Commit1af5062bRecorded18 Sep 2026Repositorysigil-dsp

Release v0.3.2: fm4 voice and the chorus, crush and comp nodes

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 package.sgl |  2 +-
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# sigil-dsp Releases
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## v0.3.2 — 2026-09-18
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This release gives motif the primitives for a fat, FM-heavy tracker sound: a real multi-operator FM voice instead of the two-operator `fosc`, and the three effects a demoscene mix is made of. Everything is plain C99, builds for wasm32-wasi as well as native, and renders the same samples on both.
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## Changes
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- `make-fm4` / `fm4-compute` in `(sigil dsp osc)`: four sine operators, an eight-entry DX/OPL-style algorithm table (stack, two-into-one, branch, three-into-one, pairs, stack-plus-one, one-into-three, additive), per-operator ratio, level and ADSR, feedback on operator 4, a modulation index that is a per-sample argument, and a velocity-to-index curve. With index 0 every carrier is a pure sine, so a `fosc`-style patch is a special case.
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- `make-chorus` / `chorus-compute` in `(sigil dsp fx)`: two LFO-modulated taps on one delay line, with rate, depth and mix as per-sample arguments.
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- `make-crush` / `crush-compute`: tanh drive, bit-depth quantisation and sample-and-hold rate reduction in one node; drive 0, 16 bits and rate 1 pass the signal through untouched.
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- `make-comp` / `comp-compute`: a feed-forward peak compressor with one-pole attack and release; threshold and ratio are per-sample arguments, attack, release and makeup are set at creation. It is mono; a host that wants linked stereo runs one instance on a shared detector or waits for a stereo variant.
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- The new declarations carry specs and docstrings, so `sigil exports` and the MCP tools show their signatures.
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- `src/c` is now an exported include directory, so a consumer that links the static library can `#include "fm4.h"`, `"fx4.h"` or `"ks.h"` instead of mirroring the structs.
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## Upgrade notes
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No existing binding changed. Consumers that mirror `sp_ks` in their own C can switch to `#include "ks.h"` now that the header is on the include path.
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## v0.3.1 — 2026-07-12
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Add a first-class web (wasm32-wasi) build config so sigil-dsp compiles for the browser via `sigil build --config web`, alongside the native build.
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## v0.3.0 — 2026-06-25
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### Changed
package.sglmodified
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(package
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name: "sigil-dsp"
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version: "0.3.1"
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version: "0.3.2"
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sigil: "0.20"
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description: "DSP primitives for Sigil (SoundPipe bindings)"
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url: "https://codeberg.org/sigil/sigil-dsp"