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website/src/content/lowpass.md

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+---
+title: "Lowpass Filter"
+slug: "lowpass"
+group: "effects"
+order: 110
+---
+
+<script lang="ts">
+  import CodeEditor from '$lib/components/CodeEditor.svelte';
+  import CommandEntry from '$lib/components/CommandEntry.svelte';
+</script>
+
+A lowpass filter attenuates frequencies above the cutoff. Each filter has its own ADSR envelope that modulates the cutoff frequency.
+
+<CommandEntry name="lpf" type="number" min={20} max={20000} unit="Hz">
+
+Cutoff frequency in Hz. Frequencies above this are attenuated.
+
+<CodeEditor code={`/sound/saw/lpf/200`} rows={2} />
+
+</CommandEntry>
+
+<CommandEntry name="lpq" type="number" min={0} max={1} default={0.2}>
+
+Resonance (0-1). Boosts frequencies near the cutoff.
+
+<CodeEditor code={`/sound/saw/lpf/200/lpq/.5`} rows={2} />
+
+</CommandEntry>
+
+<CommandEntry name="lpe" type="number" default={0}>
+
+Envelope amount. Positive values sweep the cutoff up, negative values sweep down.
+
+<CodeEditor code={`/sound/saw/lpf/100/lpe/5/lpd/.25`} rows={2} />
+
+</CommandEntry>
+
+<CommandEntry name="lpa" type="number" min={0} default={0} unit="s">
+
+Envelope attack time in seconds.
+
+<CodeEditor code={`/sound/saw/lpf/100/lpa/.25`} rows={2} />
+
+</CommandEntry>
+
+<CommandEntry name="lpd" type="number" min={0} default={0} unit="s">
+
+Envelope decay time in seconds.
+
+<CodeEditor code={`/sound/saw/lpf/100/lpd/.25`} rows={2} />
+
+</CommandEntry>
+
+<CommandEntry name="lps" type="number" min={0} max={1} default={1}>
+
+Envelope sustain level (0-1).
+
+<CodeEditor code={`/sound/saw/lpf/100/lpd/.25/lps/.4`} rows={2} />
+
+</CommandEntry>
+
+<CommandEntry name="lpr" type="number" min={0} default={0} unit="s">
+
+Envelope release time in seconds.
+
+<CodeEditor code={`/sound/saw/lpf/100/lpr/.25/duration/.1/release/.25`} rows={2} />
+
+</CommandEntry>