Feat: internal recording / overdubbing

tests/forth/sound.rs

@@ -227,6 +227,24 @@ fn noall_clears_across_evaluations() {
     assert!(!outputs[0].contains("lpf"), "lpf should be cleared: {}", outputs[0]);
 }
 
+#[test]
+fn rec() {
+    let outputs = expect_outputs(r#""loop1" rec"#, 1);
+    assert_eq!(outputs[0], "/rec/rec/sound/loop1");
+}
+
+#[test]
+fn overdub() {
+    let outputs = expect_outputs(r#""loop1" overdub"#, 1);
+    assert_eq!(outputs[0], "/rec/rec/sound/loop1/overdub/1");
+}
+
+#[test]
+fn overdub_alias_dub() {
+    let outputs = expect_outputs(r#""loop1" dub"#, 1);
+    assert_eq!(outputs[0], "/rec/rec/sound/loop1/overdub/1");
+}
+
 #[test]
 fn all_replaces_previous_global() {
     let f = forth();