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Add different wave and filter types

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This commit is contained in:
Matt Spencer
2026-03-26 10:44:18 +00:00
parent d00ac70e1c
commit f26ecda58c
10 changed files with 614 additions and 140 deletions
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41
crates/synth-core/src/audio_out.rs Normal file
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@@ -0,0 +1,41 @@
//! Audio output sink — final stage in the signal chain.
//!
//! In the patch bay this is the node you connect the last module to; it
//! represents the physical speakers / DAC.
use crate::{AudioProcessor, config::SampleRate};
use crate::descriptor::{ComponentDescriptor, Direction, JackDescriptor, ParamDescriptor, SignalKind};
pub struct AudioOut {
pub level: f32,
sample_rate: SampleRate,
}
impl AudioOut {
pub fn new(sample_rate: SampleRate) -> Self {
Self { level: 0.8, sample_rate }
}
pub const DESCRIPTOR: ComponentDescriptor = ComponentDescriptor {
kind: "out",
label: "Output",
jacks: &[
JackDescriptor { id: "audio_in", label: "In", direction: Direction::Input, signal: SignalKind::Audio },
],
params: &[
ParamDescriptor { id: "level", label: "Level", min: 0.0, max: 1.0, default: 0.8, unit: "", labels: &[] },
],
};
}
impl<const B: usize> AudioProcessor<B> for AudioOut {
fn process(&mut self, out: &mut [f32; B]) {
for s in out.iter_mut() {
*s *= self.level;
}
}
fn reset(&mut self) {
let _ = self.sample_rate; // kept for API symmetry
}
}

4
crates/synth-core/src/descriptor.rs
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@@ -50,6 +50,10 @@ pub struct ParamDescriptor {
pub default: f32,
/// Display unit string (e.g. `"Hz"`, `"s"`, `""`).
pub unit: &'static str,
/// When non-empty, this param is a discrete enum selector.
/// Each entry is the display label for that step (step 0 = index 0, etc.).
/// `min` should be 0.0 and `max` should be `(labels.len() - 1) as f32`.
pub labels: &'static [&'static str],
}
/// Full compile-time descriptor for a DSP component type.

8
crates/synth-core/src/envelope.rs
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@@ -34,10 +34,10 @@ impl Adsr {
JackDescriptor { id: "env_out", label: "Env", direction: Direction::Output, signal: SignalKind::Cv },
],
params: &[
ParamDescriptor { id: "attack_s", label: "Attack", min: 0.001, max: 4.0, default: 0.01, unit: "s" },
ParamDescriptor { id: "decay_s", label: "Decay", min: 0.001, max: 4.0, default: 0.1, unit: "s" },
ParamDescriptor { id: "sustain", label: "Sustain", min: 0.0, max: 1.0, default: 0.7, unit: "" },
ParamDescriptor { id: "release_s", label: "Release", min: 0.001, max: 8.0, default: 0.3, unit: "s" },
ParamDescriptor { id: "attack_s", label: "Attack", min: 0.001, max: 4.0, default: 0.01, unit: "s", labels: &[] },
ParamDescriptor { id: "decay_s", label: "Decay", min: 0.001, max: 4.0, default: 0.1, unit: "s", labels: &[] },
ParamDescriptor { id: "sustain", label: "Sustain", min: 0.0, max: 1.0, default: 0.7, unit: "", labels: &[] },
ParamDescriptor { id: "release_s", label: "Release", min: 0.001, max: 8.0, default: 0.3, unit: "s", labels: &[] },
],
};

5
crates/synth-core/src/filter.rs
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@@ -40,9 +40,8 @@ impl Svf {
JackDescriptor { id: "audio_out", label: "Out", direction: Direction::Output, signal: SignalKind::Audio },
],
params: &[
ParamDescriptor { id: "cutoff_hz", label: "Cutoff", min: 20.0, max: 20_000.0, default: 2_000.0, unit: "Hz" },
ParamDescriptor { id: "resonance", label: "Res", min: 0.0, max: 1.0, default: 0.5, unit: "" },
ParamDescriptor { id: "mode", label: "Mode", min: 0.0, max: 3.0, default: 0.0, unit: "" },
ParamDescriptor { id: "cutoff_hz", label: "Cutoff", min: 20.0, max: 20_000.0, default: 2_000.0, unit: "Hz", labels: &[] },
ParamDescriptor { id: "resonance", label: "Res", min: 0.0, max: 1.0, default: 0.5, unit: "", labels: &[] },
],
};

6
crates/synth-core/src/lfo.rs
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@@ -27,9 +27,9 @@ impl Lfo {
JackDescriptor { id: "cv_out", label: "Out", direction: Direction::Output, signal: SignalKind::Cv },
],
params: &[
ParamDescriptor { id: "rate_hz", label: "Rate", min: 0.01, max: 20.0, default: 2.0, unit: "Hz" },
ParamDescriptor { id: "depth", label: "Depth", min: 0.0, max: 1.0, default: 0.5, unit: "" },
ParamDescriptor { id: "waveform", label: "Wave", min: 0.0, max: 4.0, default: 0.0, unit: "" },
ParamDescriptor { id: "rate_hz", label: "Rate", min: 0.01, max: 20.0, default: 2.0, unit: "Hz", labels: &[] },
ParamDescriptor { id: "depth", label: "Depth", min: 0.0, max: 1.0, default: 0.5, unit: "", labels: &[] },
ParamDescriptor { id: "waveform", label: "Wave", min: 0.0, max: 4.0, default: 0.0, unit: "", labels: &["Sine", "Saw", "Sqr", "Tri", "Pls"] },
],
};

1
crates/synth-core/src/lib.rs
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@@ -27,6 +27,7 @@ pub mod vca;
pub mod lfo;
pub mod midi;
pub mod patch;
pub mod audio_out;
pub use config::SampleRate;
pub use math::{db_to_linear, linear_to_db, lerp, midi_note_to_hz};

4
crates/synth-core/src/oscillator.rs
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@@ -35,8 +35,8 @@ impl Vco {
JackDescriptor { id: "audio_out", label: "Out", direction: Direction::Output, signal: SignalKind::Audio },
],
params: &[
ParamDescriptor { id: "freq_hz", label: "Freq", min: 20.0, max: 20_000.0, default: 440.0, unit: "Hz" },
ParamDescriptor { id: "waveform", label: "Wave", min: 0.0, max: 4.0, default: 1.0, unit: "" },
ParamDescriptor { id: "freq_hz", label: "Freq", min: 20.0, max: 20_000.0, default: 440.0, unit: "Hz", labels: &[] },
ParamDescriptor { id: "waveform", label: "Wave", min: 0.0, max: 4.0, default: 1.0, unit: "", labels: &["Sine", "Saw", "Sqr", "Tri", "Pls"] },
],
};

2
crates/synth-core/src/vca.rs
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@@ -21,7 +21,7 @@ impl Vca {
JackDescriptor { id: "audio_out", label: "Out", direction: Direction::Output, signal: SignalKind::Audio },
],
params: &[
ParamDescriptor { id: "gain", label: "Gain", min: 0.0, max: 1.0, default: 1.0, unit: "" },
ParamDescriptor { id: "gain", label: "Gain", min: 0.0, max: 1.0, default: 1.0, unit: "", labels: &[] },
],
};
}