chain word and better save/load UI

crates/forth/src/ops.rs

@@ -79,4 +79,5 @@ pub enum Op {
     Ramp,
     Range,
     Noise,
+    Chain,
 }

crates/forth/src/types.rs

@@ -19,6 +19,7 @@ pub struct ExecutionTrace {
 pub struct StepContext {
     pub step: usize,
     pub beat: f64,
+    pub bank: usize,
     pub pattern: usize,
     pub tempo: f64,
     pub phase: f64,

crates/forth/src/vm.rs

@@ -299,6 +299,7 @@ impl Forth {
                     let val = match name.as_str() {
                         "step" => Value::Int(ctx.step as i64, None),
                         "beat" => Value::Float(ctx.beat, None),
+                        "bank" => Value::Int(ctx.bank as i64, None),
                         "pattern" => Value::Int(ctx.pattern as i64, None),
                         "tempo" => Value::Float(ctx.tempo, None),
                         "phase" => Value::Float(ctx.phase, None),
@@ -628,6 +629,24 @@ impl Forth {
                         .insert("__tempo__".to_string(), Value::Float(clamped, None));
                 }
 
+                Op::Chain => {
+                    let pattern = stack.pop().ok_or("stack underflow")?.as_int()? - 1;
+                    let bank = stack.pop().ok_or("stack underflow")?.as_int()? - 1;
+                    if bank < 0 || pattern < 0 {
+                        return Err("chain: bank and pattern must be >= 1".into());
+                    }
+                    if bank as usize == ctx.bank && pattern as usize == ctx.pattern {
+                        // chaining to self is a no-op
+                    } else {
+                        let key = format!("__chain_{}_{}__", ctx.bank, ctx.pattern);
+                        let val = format!("{bank}:{pattern}");
+                        self.vars
+                            .lock()
+                            .unwrap()
+                            .insert(key, Value::Str(val, None));
+                    }
+                }
+
                 Op::ListStart => {
                     stack.push(Value::Marker);
                 }

crates/forth/src/words.rs

@@ -428,6 +428,13 @@ pub const WORDS: &[Word] = &[
         example: "pattern => 0",
         compile: Context("pattern"),
     },
+    Word {
+        name: "pbank",
+        stack: "(-- n)",
+        desc: "Current pattern's bank index",
+        example: "pbank => 0",
+        compile: Context("bank"),
+    },
     Word {
         name: "tempo",
         stack: "(-- f)",
@@ -621,6 +628,13 @@ pub const WORDS: &[Word] = &[
         example: "140 tempo!",
         compile: Simple,
     },
+    Word {
+        name: "chain",
+        stack: "(bank pattern --)",
+        desc: "Chain to bank/pattern (1-indexed) when current pattern ends",
+        example: "1 4 chain",
+        compile: Simple,
+    },
     // Lists
     Word {
         name: "[",
@@ -1550,6 +1564,7 @@ pub(super) fn simple_op(name: &str) -> Option<Op> {
         "ramp" => Op::Ramp,
         "range" => Op::Range,
         "noise" => Op::Noise,
+        "chain" => Op::Chain,
         _ => return None,
     })
 }

crates/ratatui/src/file_browser.rs

@@ -0,0 +1,110 @@
+use ratatui::layout::{Constraint, Layout, Rect};
+use ratatui::style::{Color, Style};
+use ratatui::text::{Line, Span};
+use ratatui::widgets::Paragraph;
+use ratatui::Frame;
+
+use super::ModalFrame;
+
+pub struct FileBrowserModal<'a> {
+    title: &'a str,
+    input: &'a str,
+    entries: &'a [(String, bool)],
+    selected: usize,
+    scroll_offset: usize,
+    border_color: Color,
+    width: u16,
+    height: u16,
+}
+
+impl<'a> FileBrowserModal<'a> {
+    pub fn new(title: &'a str, input: &'a str, entries: &'a [(String, bool)]) -> Self {
+        Self {
+            title,
+            input,
+            entries,
+            selected: 0,
+            scroll_offset: 0,
+            border_color: Color::White,
+            width: 60,
+            height: 16,
+        }
+    }
+
+    pub fn selected(mut self, idx: usize) -> Self {
+        self.selected = idx;
+        self
+    }
+
+    pub fn scroll_offset(mut self, offset: usize) -> Self {
+        self.scroll_offset = offset;
+        self
+    }
+
+    pub fn border_color(mut self, c: Color) -> Self {
+        self.border_color = c;
+        self
+    }
+
+    pub fn width(mut self, w: u16) -> Self {
+        self.width = w;
+        self
+    }
+
+    pub fn height(mut self, h: u16) -> Self {
+        self.height = h;
+        self
+    }
+
+    pub fn render_centered(self, frame: &mut Frame, term: Rect) {
+        let inner = ModalFrame::new(self.title)
+            .width(self.width)
+            .height(self.height)
+            .border_color(self.border_color)
+            .render_centered(frame, term);
+
+        let rows = Layout::vertical([Constraint::Length(1), Constraint::Min(1)]).split(inner);
+
+        // Input line
+        frame.render_widget(
+            Paragraph::new(Line::from(vec![
+                Span::raw("> "),
+                Span::styled(self.input, Style::new().fg(Color::Cyan)),
+                Span::styled("█", Style::new().fg(Color::White)),
+            ])),
+            rows[0],
+        );
+
+        // Entries list
+        let visible_height = rows[1].height as usize;
+        let visible_entries = self
+            .entries
+            .iter()
+            .skip(self.scroll_offset)
+            .take(visible_height);
+
+        let lines: Vec<Line> = visible_entries
+            .enumerate()
+            .map(|(i, (name, is_dir))| {
+                let abs_idx = i + self.scroll_offset;
+                let is_selected = abs_idx == self.selected;
+                let prefix = if is_selected { "> " } else { "  " };
+                let display = if *is_dir {
+                    format!("{prefix}{name}/")
+                } else {
+                    format!("{prefix}{name}")
+                };
+                let color = if is_selected {
+                    Color::Yellow
+                } else if *is_dir {
+                    Color::Blue
+                } else {
+                    Color::White
+                };
+                Line::from(Span::styled(display, Style::new().fg(color)))
+            })
+            .collect();
+
+        frame.render_widget(Paragraph::new(lines), rows[1]);
+    }
+}

crates/ratatui/src/lib.rs

@@ -1,4 +1,6 @@
 mod confirm;
+mod file_browser;
+mod list_select;
 mod modal;
 mod scope;
 mod spectrum;
@@ -6,6 +8,8 @@ mod text_input;
 mod vu_meter;
 
 pub use confirm::ConfirmModal;
+pub use file_browser::FileBrowserModal;
+pub use list_select::ListSelect;
 pub use modal::ModalFrame;
 pub use scope::{Orientation, Scope};
 pub use spectrum::Spectrum;

crates/ratatui/src/list_select.rs

@@ -0,0 +1,103 @@
+use ratatui::layout::Rect;
+use ratatui::style::{Color, Modifier, Style};
+use ratatui::text::{Line, Span};
+use ratatui::widgets::Paragraph;
+use ratatui::Frame;
+
+pub struct ListSelect<'a> {
+    items: &'a [String],
+    selected: usize,
+    cursor: usize,
+    focused: bool,
+    visible_count: usize,
+    scroll_offset: usize,
+}
+
+impl<'a> ListSelect<'a> {
+    pub fn new(items: &'a [String], selected: usize, cursor: usize) -> Self {
+        Self {
+            items,
+            selected,
+            cursor,
+            focused: false,
+            visible_count: 5,
+            scroll_offset: 0,
+        }
+    }
+
+    pub fn focused(mut self, focused: bool) -> Self {
+        self.focused = focused;
+        self
+    }
+
+    pub fn scroll_offset(mut self, offset: usize) -> Self {
+        self.scroll_offset = offset;
+        self
+    }
+
+    pub fn visible_count(mut self, n: usize) -> Self {
+        self.visible_count = n;
+        self
+    }
+
+    pub fn height(&self) -> u16 {
+        let item_lines = self.items.len().min(self.visible_count) as u16;
+        if self.items.len() > self.visible_count {
+            item_lines + 1
+        } else {
+            item_lines
+        }
+    }
+
+    pub fn render(self, frame: &mut Frame, area: Rect) {
+        let cursor_style = Style::new().fg(Color::Yellow).add_modifier(Modifier::BOLD);
+        let selected_style = Style::new().fg(Color::Cyan);
+        let normal_style = Style::default();
+        let indicator_style = Style::new().fg(Color::DarkGray);
+
+        let visible_end = (self.scroll_offset + self.visible_count).min(self.items.len());
+        let has_above = self.scroll_offset > 0;
+        let has_below = visible_end < self.items.len();
+
+        let mut lines: Vec<Line> = Vec::new();
+
+        for i in self.scroll_offset..visible_end {
+            let name = &self.items[i];
+            let is_cursor = self.focused && i == self.cursor;
+            let is_selected = i == self.selected;
+
+            let style = if is_cursor {
+                cursor_style
+            } else if is_selected {
+                selected_style
+            } else {
+                normal_style
+            };
+
+            let prefix = if is_selected { "● " } else { "  " };
+            let mut spans = vec![
+                Span::styled(prefix.to_string(), style),
+                Span::styled(name.clone(), style),
+            ];
+
+            if has_above && i == self.scroll_offset {
+                spans.push(Span::styled(" ▲", indicator_style));
+            } else if has_below && i == visible_end - 1 {
+                spans.push(Span::styled(" ▼", indicator_style));
+            }
+
+            lines.push(Line::from(spans));
+        }
+
+        if self.items.len() > self.visible_count {
+            let position = self.cursor + 1;
+            let total = self.items.len();
+            lines.push(Line::from(Span::styled(
+                format!("  ({position}/{total})"),
+                indicator_style,
+            )));
+        }
+
+        frame.render_widget(Paragraph::new(lines), area);
+    }
+}

src/app.rs

@@ -279,6 +279,7 @@ impl App {
         let ctx = StepContext {
             step: step_idx,
             beat: link.beat(),
+            bank,
             pattern,
             tempo: link.tempo(),
             phase: link.phase(),
@@ -353,6 +354,7 @@ impl App {
             let ctx = StepContext {
                 step: step_idx,
                 beat: 0.0,
+                bank,
                 pattern,
                 tempo: link.tempo(),
                 phase: 0.0,

src/engine/sequencer.rs

@@ -6,7 +6,7 @@ use std::time::Duration;
 
 use super::LinkState;
 use crate::model::{MAX_BANKS, MAX_PATTERNS};
-use crate::model::{Dictionary, ExecutionTrace, Rng, ScriptEngine, StepContext, Variables};
+use crate::model::{Dictionary, ExecutionTrace, Rng, ScriptEngine, StepContext, Value, Variables};
 use crate::state::LiveKeyState;
 
 #[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
@@ -367,10 +367,13 @@ fn sequencer_loop(
                 step_traces.retain(|&(bank, pattern, _), _| {
                     bank != id.bank || pattern != id.pattern
                 });
+                let chain_key = format!("__chain_{}_{}__", id.bank, id.pattern);
+                variables.lock().unwrap().remove(&chain_key);
             }
         }
 
         let prev_beat = audio_state.prev_beat;
+        let mut chain_transitions: Vec<(PatternId, PatternId)> = Vec::new();
 
         for (_id, active) in audio_state.active_patterns.iter_mut() {
             let Some(pattern) = pattern_cache.get(active.bank, active.pattern) else {
@@ -397,6 +400,7 @@ fn sequencer_loop(
                         let ctx = StepContext {
                             step: step_idx,
                             beat,
+                            bank: active.bank,
                             pattern: active.pattern,
                             tempo,
                             phase: beat % quantum,
@@ -440,11 +444,44 @@ fn sequencer_loop(
                 let next_step = active.step_index + 1;
                 if next_step >= pattern.length {
                     active.iter += 1;
+                    let chain_key = format!("__chain_{}_{}__", active.bank, active.pattern);
+                    let chain_target = {
+                        let vars = variables.lock().unwrap();
+                        vars.get(&chain_key).and_then(|v| {
+                            if let Value::Str(s, _) = v {
+                                let parts: Vec<&str> = s.split(':').collect();
+                                if parts.len() == 2 {
+                                    let b = parts[0].parse::<usize>().ok()?;
+                                    let p = parts[1].parse::<usize>().ok()?;
+                                    Some(PatternId { bank: b, pattern: p })
+                                } else {
+                                    None
+                                }
+                            } else {
+                                None
+                            }
+                        })
+                    };
+                    if let Some(target) = chain_target {
+                        let source = PatternId { bank: active.bank, pattern: active.pattern };
+                        chain_transitions.push((source, target));
+                    }
                 }
                 active.step_index = next_step % pattern.length;
             }
         }
 
+        for (source, target) in chain_transitions {
+            if !audio_state.pending_stops.contains(&source) {
+                audio_state.pending_stops.push(source);
+            }
+            if !audio_state.pending_starts.contains(&target) {
+                audio_state.pending_starts.push(target);
+            }
+            let chain_key = format!("__chain_{}_{}__", source.bank, source.pattern);
+            variables.lock().unwrap().remove(&chain_key);
+        }
+
         {
             let mut state = shared_state.lock().unwrap();
             state.active_patterns = audio_state

src/input.rs

@@ -190,31 +190,32 @@ fn handle_modal_input(ctx: &mut InputContext, key: KeyEvent) -> InputResult {
                 _ => {}
             }
         }
-        Modal::SaveAs(path) => match key.code {
+        Modal::FileBrowser(state) => match key.code {
             KeyCode::Enter => {
-                let save_path = PathBuf::from(path.as_str());
+                use crate::state::file_browser::FileBrowserMode;
+                let mode = state.mode.clone();
+                if let Some(path) = state.confirm() {
                     ctx.dispatch(AppCommand::CloseModal);
-                ctx.dispatch(AppCommand::Save(save_path));
-            }
-            KeyCode::Esc => ctx.dispatch(AppCommand::CloseModal),
-            KeyCode::Backspace => {
-                path.pop();
-            }
-            KeyCode::Char(c) => path.push(c),
-            _ => {}
-        },
-        Modal::LoadFrom(path) => match key.code {
-            KeyCode::Enter => {
-                let load_path = PathBuf::from(path.as_str());
-                ctx.dispatch(AppCommand::CloseModal);
-                ctx.dispatch(AppCommand::Load(load_path));
+                    match mode {
+                        FileBrowserMode::Save => ctx.dispatch(AppCommand::Save(path)),
+                        FileBrowserMode::Load => {
+                            ctx.dispatch(AppCommand::Load(path));
                             load_project_samples(ctx);
                         }
-            KeyCode::Esc => ctx.dispatch(AppCommand::CloseModal),
-            KeyCode::Backspace => {
-                path.pop();
                     }
-            KeyCode::Char(c) => path.push(c),
+                }
+            }
+            KeyCode::Esc => ctx.dispatch(AppCommand::CloseModal),
+            KeyCode::Tab => state.autocomplete(),
+            KeyCode::Left => state.go_up(),
+            KeyCode::Right => state.enter_selected(),
+            KeyCode::Up => state.select_prev(12),
+            KeyCode::Down => state.select_next(12),
+            KeyCode::Backspace => state.backspace(),
+            KeyCode::Char(c) => {
+                state.input.push(c);
+                state.refresh_entries();
+            }
             _ => {}
         },
         Modal::RenameBank { bank, name } => match key.code {
@@ -438,13 +439,23 @@ fn handle_main_page(ctx: &mut InputContext, key: KeyEvent, ctrl: bool) -> InputR
         KeyCode::Enter => ctx.dispatch(AppCommand::OpenModal(Modal::Editor)),
         KeyCode::Char('t') => ctx.dispatch(AppCommand::ToggleStep),
         KeyCode::Char('s') => {
-            ctx.dispatch(AppCommand::OpenModal(Modal::SaveAs(String::new())));
+            use crate::state::file_browser::FileBrowserState;
+            let initial = ctx
+                .app
+                .project_state
+                .file_path
+                .as_ref()
+                .map(|p| p.display().to_string())
+                .unwrap_or_default();
+            let state = FileBrowserState::new_save(initial);
+            ctx.dispatch(AppCommand::OpenModal(Modal::FileBrowser(state)));
         }
         KeyCode::Char('c') if ctrl => ctx.dispatch(AppCommand::CopyStep),
         KeyCode::Char('v') if ctrl => ctx.dispatch(AppCommand::PasteStep),
         KeyCode::Char('b') if ctrl => ctx.dispatch(AppCommand::LinkPasteStep),
         KeyCode::Char('h') if ctrl => ctx.dispatch(AppCommand::HardenStep),
         KeyCode::Char('l') => {
+            use crate::state::file_browser::FileBrowserState;
             let default_dir = ctx
                 .app
                 .project_state
@@ -459,7 +470,8 @@ fn handle_main_page(ctx: &mut InputContext, key: KeyEvent, ctrl: bool) -> InputR
                     s
                 })
                 .unwrap_or_default();
-            ctx.dispatch(AppCommand::OpenModal(Modal::LoadFrom(default_dir)));
+            let state = FileBrowserState::new_load(default_dir);
+            ctx.dispatch(AppCommand::OpenModal(Modal::FileBrowser(state)));
         }
         KeyCode::Char('+') | KeyCode::Char('=') => ctx.dispatch(AppCommand::TempoUp),
         KeyCode::Char('-') => ctx.dispatch(AppCommand::TempoDown),
@@ -589,12 +601,62 @@ fn handle_audio_page(ctx: &mut InputContext, key: KeyEvent) -> InputResult {
                 selected: false,
             }));
         }
-        KeyCode::Up | KeyCode::Char('k') => ctx.app.audio.prev_focus(),
-        KeyCode::Down | KeyCode::Char('j') => ctx.app.audio.next_focus(),
+        KeyCode::Tab => ctx.app.audio.next_focus(),
+        KeyCode::BackTab => ctx.app.audio.prev_focus(),
+        KeyCode::Up => match ctx.app.audio.focus {
+            AudioFocus::OutputDevice => ctx.app.audio.output_list.move_up(),
+            AudioFocus::InputDevice => ctx.app.audio.input_list.move_up(),
+            _ => {}
+        },
+        KeyCode::Down => match ctx.app.audio.focus {
+            AudioFocus::OutputDevice => {
+                let count = ctx.app.audio.output_devices.len();
+                ctx.app.audio.output_list.move_down(count);
+            }
+            AudioFocus::InputDevice => {
+                let count = ctx.app.audio.input_devices.len();
+                ctx.app.audio.input_list.move_down(count);
+            }
+            _ => {}
+        },
+        KeyCode::PageUp => match ctx.app.audio.focus {
+            AudioFocus::OutputDevice => ctx.app.audio.output_list.page_up(),
+            AudioFocus::InputDevice => ctx.app.audio.input_list.page_up(),
+            _ => {}
+        },
+        KeyCode::PageDown => match ctx.app.audio.focus {
+            AudioFocus::OutputDevice => {
+                let count = ctx.app.audio.output_devices.len();
+                ctx.app.audio.output_list.page_down(count);
+            }
+            AudioFocus::InputDevice => {
+                let count = ctx.app.audio.input_devices.len();
+                ctx.app.audio.input_list.page_down(count);
+            }
+            _ => {}
+        },
+        KeyCode::Enter => match ctx.app.audio.focus {
+            AudioFocus::OutputDevice => {
+                let cursor = ctx.app.audio.output_list.cursor;
+                if cursor < ctx.app.audio.output_devices.len() {
+                    ctx.app.audio.config.output_device =
+                        Some(ctx.app.audio.output_devices[cursor].name.clone());
+                    ctx.app.save_settings(ctx.link);
+                }
+            }
+            AudioFocus::InputDevice => {
+                let cursor = ctx.app.audio.input_list.cursor;
+                if cursor < ctx.app.audio.input_devices.len() {
+                    ctx.app.audio.config.input_device =
+                        Some(ctx.app.audio.input_devices[cursor].name.clone());
+                    ctx.app.save_settings(ctx.link);
+                }
+            }
+            _ => {}
+        },
         KeyCode::Left => {
             match ctx.app.audio.focus {
-                AudioFocus::OutputDevice => ctx.app.audio.prev_output_device(),
-                AudioFocus::InputDevice => ctx.app.audio.prev_input_device(),
+                AudioFocus::OutputDevice | AudioFocus::InputDevice => {}
                 AudioFocus::Channels => ctx.app.audio.adjust_channels(-1),
                 AudioFocus::BufferSize => ctx.app.audio.adjust_buffer_size(-64),
                 AudioFocus::RefreshRate => ctx.app.audio.toggle_refresh_rate(),
@@ -614,14 +676,16 @@ fn handle_audio_page(ctx: &mut InputContext, key: KeyEvent) -> InputResult {
                     .set_start_stop_sync_enabled(!ctx.link.is_start_stop_sync_enabled()),
                 AudioFocus::Quantum => ctx.link.set_quantum(ctx.link.quantum() - 1.0),
             }
-            if ctx.app.audio.focus != AudioFocus::SamplePaths {
+            if !matches!(
+                ctx.app.audio.focus,
+                AudioFocus::SamplePaths | AudioFocus::OutputDevice | AudioFocus::InputDevice
+            ) {
                 ctx.app.save_settings(ctx.link);
             }
         }
         KeyCode::Right => {
             match ctx.app.audio.focus {
-                AudioFocus::OutputDevice => ctx.app.audio.next_output_device(),
-                AudioFocus::InputDevice => ctx.app.audio.next_input_device(),
+                AudioFocus::OutputDevice | AudioFocus::InputDevice => {}
                 AudioFocus::Channels => ctx.app.audio.adjust_channels(1),
                 AudioFocus::BufferSize => ctx.app.audio.adjust_buffer_size(64),
                 AudioFocus::RefreshRate => ctx.app.audio.toggle_refresh_rate(),
@@ -641,7 +705,10 @@ fn handle_audio_page(ctx: &mut InputContext, key: KeyEvent) -> InputResult {
                     .set_start_stop_sync_enabled(!ctx.link.is_start_stop_sync_enabled()),
                 AudioFocus::Quantum => ctx.link.set_quantum(ctx.link.quantum() + 1.0),
             }
-            if ctx.app.audio.focus != AudioFocus::SamplePaths {
+            if !matches!(
+                ctx.app.audio.focus,
+                AudioFocus::SamplePaths | AudioFocus::OutputDevice | AudioFocus::InputDevice
+            ) {
                 ctx.app.save_settings(ctx.link);
             }
         }

src/model/mod.rs

@@ -2,4 +2,4 @@ mod script;
 
 pub use cagire_forth::{Word, WordCompile, WORDS};
 pub use cagire_project::{load, save, Bank, Pattern, PatternSpeed, Project, MAX_BANKS, MAX_PATTERNS};
-pub use script::{Dictionary, ExecutionTrace, Rng, ScriptEngine, SourceSpan, StepContext, Variables};
+pub use script::{Dictionary, ExecutionTrace, Rng, ScriptEngine, SourceSpan, StepContext, Value, Variables};

src/model/script.rs

@@ -1,6 +1,6 @@
 use cagire_forth::Forth;
 
-pub use cagire_forth::{Dictionary, ExecutionTrace, Rng, SourceSpan, StepContext, Variables};
+pub use cagire_forth::{Dictionary, ExecutionTrace, Rng, SourceSpan, StepContext, Value, Variables};
 
 pub struct ScriptEngine {
     forth: Forth,

src/state/audio.rs

@@ -77,6 +77,45 @@ impl Default for AudioConfig {
     }
 }
 
+pub struct ListSelectState {
+    pub cursor: usize,
+    pub scroll_offset: usize,
+}
+
+impl ListSelectState {
+    pub fn move_up(&mut self) {
+        if self.cursor > 0 {
+            self.cursor -= 1;
+            if self.cursor < self.scroll_offset {
+                self.scroll_offset = self.cursor;
+            }
+        }
+    }
+
+    pub fn move_down(&mut self, item_count: usize) {
+        if self.cursor + 1 < item_count {
+            self.cursor += 1;
+            if self.cursor >= self.scroll_offset + 5 {
+                self.scroll_offset = self.cursor - 4;
+            }
+        }
+    }
+
+    pub fn page_up(&mut self) {
+        self.cursor = self.cursor.saturating_sub(5);
+        if self.cursor < self.scroll_offset {
+            self.scroll_offset = self.cursor;
+        }
+    }
+
+    pub fn page_down(&mut self, item_count: usize) {
+        self.cursor = (self.cursor + 5).min(item_count.saturating_sub(1));
+        if self.cursor >= self.scroll_offset + 5 {
+            self.scroll_offset = self.cursor.saturating_sub(4);
+        }
+    }
+}
+
 #[derive(Clone, Copy, PartialEq, Eq, Default)]
 pub enum AudioFocus {
     #[default]
@@ -127,6 +166,8 @@ pub struct AudioSettings {
     pub focus: AudioFocus,
     pub output_devices: Vec<AudioDeviceInfo>,
     pub input_devices: Vec<AudioDeviceInfo>,
+    pub output_list: ListSelectState,
+    pub input_list: ListSelectState,
     pub restart_pending: bool,
     pub error: Option<String>,
 }
@@ -138,6 +179,8 @@ impl Default for AudioSettings {
             focus: AudioFocus::default(),
             output_devices: doux::audio::list_output_devices(),
             input_devices: doux::audio::list_input_devices(),
+            output_list: ListSelectState { cursor: 0, scroll_offset: 0 },
+            input_list: ListSelectState { cursor: 0, scroll_offset: 0 },
             restart_pending: false,
             error: None,
         }
@@ -184,25 +227,7 @@ impl AudioSettings {
         };
     }
 
-    pub fn next_output_device(&mut self) {
-        if self.output_devices.is_empty() {
-            return;
-        }
-        let current_idx = self.current_output_device_index();
-        let next_idx = (current_idx + 1) % self.output_devices.len();
-        self.config.output_device = Some(self.output_devices[next_idx].name.clone());
-    }
-
-    pub fn prev_output_device(&mut self) {
-        if self.output_devices.is_empty() {
-            return;
-        }
-        let current_idx = self.current_output_device_index();
-        let prev_idx = (current_idx + self.output_devices.len() - 1) % self.output_devices.len();
-        self.config.output_device = Some(self.output_devices[prev_idx].name.clone());
-    }
-
-    fn current_output_device_index(&self) -> usize {
+    pub fn current_output_device_index(&self) -> usize {
         match &self.config.output_device {
             Some(name) => self
                 .output_devices
@@ -217,25 +242,7 @@ impl AudioSettings {
         }
     }
 
-    pub fn next_input_device(&mut self) {
-        if self.input_devices.is_empty() {
-            return;
-        }
-        let current_idx = self.current_input_device_index();
-        let next_idx = (current_idx + 1) % self.input_devices.len();
-        self.config.input_device = Some(self.input_devices[next_idx].name.clone());
-    }
-
-    pub fn prev_input_device(&mut self) {
-        if self.input_devices.is_empty() {
-            return;
-        }
-        let current_idx = self.current_input_device_index();
-        let prev_idx = (current_idx + self.input_devices.len() - 1) % self.input_devices.len();
-        self.config.input_device = Some(self.input_devices[prev_idx].name.clone());
-    }
-
-    fn current_input_device_index(&self) -> usize {
+    pub fn current_input_device_index(&self) -> usize {
         match &self.config.input_device {
             Some(name) => self
                 .input_devices
@@ -264,29 +271,6 @@ impl AudioSettings {
         self.config.refresh_rate = self.config.refresh_rate.toggle();
     }
 
-    pub fn current_output_device_name(&self) -> &str {
-        match &self.config.output_device {
-            Some(name) => name,
-            None => self
-                .output_devices
-                .iter()
-                .find(|d| d.is_default)
-                .map(|d| d.name.as_str())
-                .unwrap_or("Default"),
-        }
-    }
-
-    pub fn current_input_device_name(&self) -> &str {
-        match &self.config.input_device {
-            Some(name) => name,
-            None => self
-                .input_devices
-                .iter()
-                .find(|d| d.is_default)
-                .map(|d| d.name.as_str())
-                .unwrap_or("None"),
-        }
-    }
 
     pub fn add_sample_path(&mut self, path: PathBuf) {
         if !self.config.sample_paths.contains(&path) {

src/state/file_browser.rs

@@ -0,0 +1,266 @@
+use std::cmp::Ordering;
+use std::fs;
+use std::path::{Path, PathBuf};
+
+#[derive(Clone, PartialEq, Eq)]
+pub enum FileBrowserMode {
+    Save,
+    Load,
+}
+
+#[derive(Clone, PartialEq, Eq)]
+pub struct DirEntry {
+    pub name: String,
+    pub is_dir: bool,
+}
+
+#[derive(Clone, PartialEq, Eq)]
+pub struct FileBrowserState {
+    pub mode: FileBrowserMode,
+    pub input: String,
+    pub entries: Vec<DirEntry>,
+    pub selected: usize,
+    pub scroll_offset: usize,
+}
+
+impl FileBrowserState {
+    pub fn new_save(initial_path: String) -> Self {
+        let mut state = Self {
+            mode: FileBrowserMode::Save,
+            input: initial_path,
+            entries: Vec::new(),
+            selected: 0,
+            scroll_offset: 0,
+        };
+        state.refresh_entries();
+        state
+    }
+
+    pub fn new_load(initial_path: String) -> Self {
+        let mut state = Self {
+            mode: FileBrowserMode::Load,
+            input: initial_path,
+            entries: Vec::new(),
+            selected: 0,
+            scroll_offset: 0,
+        };
+        state.refresh_entries();
+        state
+    }
+
+    fn current_dir(&self) -> PathBuf {
+        if self.input.is_empty() {
+            return std::env::current_dir().unwrap_or_else(|_| PathBuf::from("/"));
+        }
+        let path = Path::new(&self.input);
+        if self.input.ends_with('/') {
+            path.to_path_buf()
+        } else {
+            match path.parent() {
+                Some(p) if !p.as_os_str().is_empty() => p.to_path_buf(),
+                _ => std::env::current_dir().unwrap_or_else(|_| PathBuf::from("/")),
+            }
+        }
+    }
+
+    fn partial_name(&self) -> &str {
+        if self.input.is_empty() || self.input.ends_with('/') {
+            ""
+        } else if !self.input.contains('/') {
+            &self.input
+        } else {
+            Path::new(&self.input)
+                .file_name()
+                .and_then(|n| n.to_str())
+                .unwrap_or("")
+        }
+    }
+
+    pub fn refresh_entries(&mut self) {
+        let dir = self.current_dir();
+        let prefix = self.partial_name().to_lowercase();
+
+        let mut entries = Vec::new();
+
+        if prefix.is_empty() && dir.parent().is_some() {
+            entries.push(DirEntry {
+                name: "..".to_string(),
+                is_dir: true,
+            });
+        }
+
+        if let Ok(read_dir) = fs::read_dir(&dir) {
+            for entry in read_dir.flatten() {
+                let name = entry.file_name().to_string_lossy().into_owned();
+                if name.starts_with('.') {
+                    continue;
+                }
+                let is_dir = entry.file_type().map(|ft| ft.is_dir()).unwrap_or(false);
+                if prefix.is_empty() || name.to_lowercase().starts_with(&prefix) {
+                    entries.push(DirEntry { name, is_dir });
+                }
+            }
+        }
+
+        entries.sort_by(|a, b| match (a.name.as_str(), b.name.as_str()) {
+            ("..", _) => Ordering::Less,
+            (_, "..") => Ordering::Greater,
+            _ => match (a.is_dir, b.is_dir) {
+                (true, false) => Ordering::Less,
+                (false, true) => Ordering::Greater,
+                _ => a.name.to_lowercase().cmp(&b.name.to_lowercase()),
+            },
+        });
+
+        self.entries = entries;
+        self.selected = 0;
+        self.scroll_offset = 0;
+    }
+
+    pub fn autocomplete(&mut self) {
+        let real_entries: Vec<&DirEntry> =
+            self.entries.iter().filter(|e| e.name != "..").collect();
+        if real_entries.is_empty() {
+            return;
+        }
+
+        let lcp = longest_common_prefix(&real_entries);
+        if lcp.is_empty() {
+            return;
+        }
+
+        let dir = self.current_dir();
+        let mut new_input = dir.join(&lcp).display().to_string();
+
+        if real_entries.len() == 1 && real_entries[0].is_dir && !new_input.ends_with('/') {
+            new_input.push('/');
+        }
+
+        if new_input != self.input {
+            self.input = new_input;
+            self.refresh_entries();
+        }
+    }
+
+    pub fn select_next(&mut self, visible_height: usize) {
+        if self.selected + 1 < self.entries.len() {
+            self.selected += 1;
+            if self.selected >= self.scroll_offset + visible_height {
+                self.scroll_offset = self.selected + 1 - visible_height;
+            }
+        }
+    }
+
+    pub fn select_prev(&mut self, _visible_height: usize) {
+        if self.selected > 0 {
+            self.selected -= 1;
+            if self.selected < self.scroll_offset {
+                self.scroll_offset = self.selected;
+            }
+        }
+    }
+
+    pub fn confirm(&mut self) -> Option<PathBuf> {
+        if !self.entries.is_empty() {
+            let entry = &self.entries[self.selected];
+            if entry.is_dir {
+                self.navigate_to_selected();
+                return None;
+            }
+            let path = self.current_dir().join(&entry.name);
+            if self.mode == FileBrowserMode::Save {
+                ensure_parent_dirs(&path);
+            }
+            return Some(path);
+        }
+
+        if self.mode == FileBrowserMode::Save && !self.input.is_empty() {
+            let path = PathBuf::from(&self.input);
+            ensure_parent_dirs(&path);
+            return Some(path);
+        }
+
+        None
+    }
+
+    pub fn enter_selected(&mut self) {
+        if let Some(entry) = self.entries.get(self.selected) {
+            if entry.is_dir {
+                self.navigate_to_selected();
+            }
+        }
+    }
+
+    pub fn go_up(&mut self) {
+        let dir = self.current_dir();
+        if let Some(parent) = dir.parent() {
+            self.input = format_dir_path(parent);
+            self.refresh_entries();
+        }
+    }
+
+    pub fn backspace(&mut self) {
+        if self.input.is_empty() {
+            return;
+        }
+        if self.input.ends_with('/') && self.input.len() > 1 {
+            let trimmed = &self.input[..self.input.len() - 1];
+            match trimmed.rfind('/') {
+                Some(pos) => self.input = trimmed[..=pos].to_string(),
+                None => self.input.clear(),
+            }
+        } else {
+            self.input.pop();
+        }
+        self.refresh_entries();
+    }
+
+    fn navigate_to_selected(&mut self) {
+        let entry = &self.entries[self.selected];
+        if entry.name == ".." {
+            self.go_up();
+        } else {
+            let dir = self.current_dir();
+            self.input = format_dir_path(&dir.join(&entry.name));
+            self.refresh_entries();
+        }
+    }
+}
+
+fn format_dir_path(path: &Path) -> String {
+    let mut s = path.display().to_string();
+    if !s.ends_with('/') {
+        s.push('/');
+    }
+    s
+}
+
+fn ensure_parent_dirs(path: &Path) {
+    if let Some(parent) = path.parent() {
+        if !parent.exists() {
+            let _ = fs::create_dir_all(parent);
+        }
+    }
+}
+
+fn longest_common_prefix(entries: &[&DirEntry]) -> String {
+    if entries.is_empty() {
+        return String::new();
+    }
+    let first = &entries[0].name;
+    let mut len = first.len();
+    for entry in &entries[1..] {
+        len = first
+            .chars()
+            .zip(entry.name.chars())
+            .take_while(|(a, b)| a.to_lowercase().eq(b.to_lowercase()))
+            .count()
+            .min(len);
+    }
+    first[..first
+        .char_indices()
+        .nth(len)
+        .map(|(i, _)| i)
+        .unwrap_or(first.len())]
+    .to_string()
+}

src/state/mod.rs

@@ -1,5 +1,6 @@
 pub mod audio;
 pub mod editor;
+pub mod file_browser;
 pub mod live_keys;
 pub mod modal;
 pub mod patterns_nav;

src/state/modal.rs

@@ -1,4 +1,5 @@
 use crate::state::editor::PatternField;
+use crate::state::file_browser::FileBrowserState;
 
 #[derive(Clone, PartialEq, Eq)]
 pub enum Modal {
@@ -21,8 +22,7 @@ pub enum Modal {
         bank: usize,
         selected: bool,
     },
-    SaveAs(String),
-    LoadFrom(String),
+    FileBrowser(FileBrowserState),
     RenameBank {
         bank: usize,
         name: String,

src/views/audio_view.rs

@@ -1,3 +1,4 @@
+use cagire_ratatui::ListSelect;
 use ratatui::layout::{Alignment, Constraint, Layout, Rect};
 use ratatui::style::{Color, Modifier, Style};
 use ratatui::text::{Line, Span};
@@ -44,8 +45,10 @@ fn render_audio_section(frame: &mut Frame, app: &App, area: Rect) {
         height: inner.height.saturating_sub(1),
     };
 
+    let devices_height = devices_section_height(app);
+
     let [devices_area, _, settings_area, _, samples_area] = Layout::vertical([
-        Constraint::Length(4),
+        Constraint::Length(devices_height),
         Constraint::Length(1),
         Constraint::Length(8),
         Constraint::Length(1),
@@ -58,39 +61,57 @@ fn render_audio_section(frame: &mut Frame, app: &App, area: Rect) {
     render_samples(frame, app, samples_area);
 }
 
+fn list_height(item_count: usize) -> u16 {
+    let visible = item_count.min(5) as u16;
+    if item_count > 5 { visible + 1 } else { visible }
+}
+
+fn devices_section_height(app: &App) -> u16 {
+    // header(1) + "Output" label(1) + output list + "Input" label(1) + input list
+    1 + 1 + list_height(app.audio.output_devices.len())
+      + 1 + list_height(app.audio.input_devices.len())
+}
+
 fn render_devices(frame: &mut Frame, app: &App, area: Rect) {
     let header_style = Style::new()
         .fg(Color::Rgb(100, 160, 180))
         .add_modifier(Modifier::BOLD);
-
-    let [header_area, content_area] =
-        Layout::vertical([Constraint::Length(1), Constraint::Min(1)]).areas(area);
-
-    frame.render_widget(Paragraph::new("Devices").style(header_style), header_area);
-
-    let highlight = Style::new().fg(Color::Yellow).add_modifier(Modifier::BOLD);
-    let normal = Style::new().fg(Color::White);
     let label_style = Style::new().fg(Color::Rgb(120, 125, 135));
 
-    let output_name = truncate_name(app.audio.current_output_device_name(), 35);
-    let input_name = truncate_name(app.audio.current_input_device_name(), 35);
+    let output_h = list_height(app.audio.output_devices.len());
+    let input_h = list_height(app.audio.input_devices.len());
 
-    let output_focused = app.audio.focus == AudioFocus::OutputDevice;
-    let input_focused = app.audio.focus == AudioFocus::InputDevice;
+    let [header_area, output_label_area, output_list_area, input_label_area, input_list_area] =
+        Layout::vertical([
+            Constraint::Length(1),
+            Constraint::Length(1),
+            Constraint::Length(output_h),
+            Constraint::Length(1),
+            Constraint::Length(input_h),
+        ])
+        .areas(area);
 
-    let rows = vec![
-        Row::new(vec![
-            Span::styled("Output", label_style),
-            render_selector(&output_name, output_focused, highlight, normal),
-        ]),
-        Row::new(vec![
-            Span::styled("Input", label_style),
-            render_selector(&input_name, input_focused, highlight, normal),
-        ]),
-    ];
+    frame.render_widget(Paragraph::new("Devices").style(header_style), header_area);
+    frame.render_widget(Paragraph::new(Span::styled("Output", label_style)), output_label_area);
+    frame.render_widget(Paragraph::new(Span::styled("Input", label_style)), input_label_area);
 
-    let table = Table::new(rows, [Constraint::Length(8), Constraint::Fill(1)]);
-    frame.render_widget(table, content_area);
+    let output_items: Vec<String> = app.audio.output_devices.iter()
+        .map(|d| truncate_name(&d.name, 35))
+        .collect();
+    let output_selected = app.audio.current_output_device_index();
+    ListSelect::new(&output_items, output_selected, app.audio.output_list.cursor)
+        .focused(app.audio.focus == AudioFocus::OutputDevice)
+        .scroll_offset(app.audio.output_list.scroll_offset)
+        .render(frame, output_list_area);
+
+    let input_items: Vec<String> = app.audio.input_devices.iter()
+        .map(|d| truncate_name(&d.name, 35))
+        .collect();
+    let input_selected = app.audio.current_input_device_index();
+    ListSelect::new(&input_items, input_selected, app.audio.input_list.cursor)
+        .focused(app.audio.focus == AudioFocus::InputDevice)
+        .scroll_offset(app.audio.input_list.scroll_offset)
+        .render(frame, input_list_area);
 }
 
 fn render_settings(frame: &mut Frame, app: &App, area: Rect) {

src/views/render.rs

@@ -316,16 +316,24 @@ fn render_modal(frame: &mut Frame, app: &App, snapshot: &SequencerSnapshot, term
             ConfirmModal::new("Confirm", &format!("Reset bank {}?", bank + 1), *selected)
                 .render_centered(frame, term);
         }
-        Modal::SaveAs(path) => {
-            TextInputModal::new("Save As (Enter to confirm, Esc to cancel)", path)
+        Modal::FileBrowser(state) => {
+            use crate::state::file_browser::FileBrowserMode;
+            use crate::widgets::FileBrowserModal;
+            let (title, border_color) = match state.mode {
+                FileBrowserMode::Save => ("Save As", Color::Green),
+                FileBrowserMode::Load => ("Load From", Color::Blue),
+            };
+            let entries: Vec<(String, bool)> = state
+                .entries
+                .iter()
+                .map(|e| (e.name.clone(), e.is_dir))
+                .collect();
+            FileBrowserModal::new(title, &state.input, &entries)
+                .selected(state.selected)
+                .scroll_offset(state.scroll_offset)
+                .border_color(border_color)
                 .width(60)
-                .border_color(Color::Green)
-                .render_centered(frame, term);
-        }
-        Modal::LoadFrom(path) => {
-            TextInputModal::new("Load From (Enter to confirm, Esc to cancel)", path)
-                .width(60)
-                .border_color(Color::Blue)
+                .height(18)
                 .render_centered(frame, term);
         }
         Modal::RenameBank { bank, name } => {

src/widgets/mod.rs

@@ -1 +1,4 @@
-pub use cagire_ratatui::{ConfirmModal, ModalFrame, Orientation, Scope, Spectrum, TextInputModal, VuMeter};
+pub use cagire_ratatui::{
+    ConfirmModal, FileBrowserModal, ModalFrame, Orientation, Scope, Spectrum, TextInputModal,
+    VuMeter,
+};

tests/forth/harness.rs

@@ -8,6 +8,7 @@ pub fn default_ctx() -> StepContext {
     StepContext {
         step: 0,
         beat: 0.0,
+        bank: 0,
         pattern: 0,
         tempo: 120.0,
         phase: 0.0,