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Implement a collection of filters and filter building blocks #63

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colinbdclark opened this issue May 12, 2023 · 0 comments
Open

Implement a collection of filters and filter building blocks #63

colinbdclark opened this issue May 12, 2023 · 0 comments

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@colinbdclark
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Signaletic currently only has a simple one pole low pass filter for smoothing signals, but it would be nice to have a variety of filters and building blocks for implementing filtering algorithms. They will also be a useful case study for extending Signaletic to handle "property relationships"—such as the case when a cutoff frequency is updated and requires coefficients to be recalculated as a result.

A good place to start might be a characterful LPF, such as a Moog-style filter. This port of Teensy's ladder filter by Nick Donaldson looks quite good. There's also this repository of comparative implementations.
colinbdclark added a commit to colinbdclark/signaletic that referenced this issue May 20, 2023
@colinbdclark
lichen-community-systemsgh-63: Implements Puckette's Moog-style ladde…
739ec62 
…r filter.

Also includes an example of a stereo filter firmware for Bluemchen.
colinbdclark added a commit to colinbdclark/signaletic that referenced this issue May 25, 2023
@colinbdclark
lichen-community-systemsgh-63: Adds Valimaki and Huovilainen ladder a…
6e9946f 
…nd a tilt EQ.
colinbdclark added a commit to colinbdclark/signaletic that referenced this issue May 25, 2023
@colinbdclark
lichen-community-systemsgh-63: Adds parameters for passband gain and …
57bbbd0 
…overdrive.

Adds an output tap after the second stage of the ladder lpf.
colinbdclark added a commit to colinbdclark/signaletic that referenced this issue May 25, 2023
@colinbdclark
lichen-community-systemsgh-63: Also adds two pole output for Bob.
9bc7201
colinbdclark added a commit to colinbdclark/signaletic that referenced this issue May 26, 2023
@colinbdclark
lichen-community-systemsgh-63: Adds stage mixing as per Valimaki and …
85187b8 
…Huovilainen.
colinbdclark added a commit to colinbdclark/signaletic that referenced this issue May 31, 2023
@colinbdclark
lichen-community-systemsgh-63: Adds "deconstructed" filter example fo…
5d12d81 
…r the Versio platform.
colinbdclark added a commit to colinbdclark/signaletic that referenced this issue Jun 1, 2023
@colinbdclark
lichen-community-systemsgh-63: Adds encoder support to Daisy host.
122064a 
Updates Bluemchen filter example to support multiple filter modes.
colinbdclark added a commit to colinbdclark/signaletic that referenced this issue Jun 21, 2023
@colinbdclark
lichen-community-systemsgh-63: Adds support for tri-switches on Versio.
50f548a 
Updates scaling of Versio pole mixing filter knobs.
colinbdclark added a commit to colinbdclark/signaletic that referenced this issue Jun 21, 2023
@colinbdclark
lichen-community-systemsgh-63: Some comment cleanup and renaming.
b54fccb
colinbdclark added a commit to colinbdclark/signaletic that referenced this issue Jun 22, 2023
@colinbdclark
lichen-community-systemsgh-63: Updates name of filter inputs. Adds mo…
8c641bc 
…des to Bluemchen filter.
colinbdclark added a commit to colinbdclark/signaletic that referenced this issue Jul 10, 2024
@colinbdclark
lichen-community-systemsgh-63: Fixes bugs in Ladder implementation an…
63737fb 
…d bumps oversampling to 4x.

Adds a little more gain to the Bifocals filter.
colinbdclark added a commit to colinbdclark/signaletic that referenced this issue Jul 11, 2024
@colinbdclark
Merge branch 'lichen-community-systemsgh-67'
2c918ad 
* lichen-community-systemsgh-67: (39 commits)
  lichen-community-systemsgh-63: Fixes bugs in Ladder implementation and bumps oversampling to 4x. Adds a little more gain to the Bifocals filter.
  Resolves lichen-community-systemsgh-22: Updates Versio support to new Host API.
  lichen-community-systemsgh-22: Adds a Patch_init() device and updates examples to new Host API.
  lichen-community-systemsgh-67: Addresses several warning revealed by MSVC.
  Random stab in the dark for CI failure on macOS.
  lichen-community-systemsgh-22: Adds support for different types of buffered analog outputs, and for scaling outputs to accommodate situations like the DPT's offset internal DAC outputs.
  lichen-community-systemsgh-22: Updates DPT support to use new Host API.
  lichen-community-systemsgh-22: Updates Lichen Medium device to ADCController API.
  lichen-community-systemsgh-22: Adds device support for Nehcmeulb. Updates all Bluemchen examples to work with the new Host API.
  lichen-community-systemsgh-22: Brings back encoder support for Daisy host.. Updates Bluemchen calibrator and filter examples to latest API.
  lichen-community-systemsgh-22: Updates Bluemchen osc and bare board examples to latest API. Changes Freddie firmware to match Bubbles' MIDI map.
  Addresses some type coercion warnings raised by MSVC.
  lichen-community-systemsgh-25: Adds unit tests for sig_dsp_List interpolation. Fixes bugs with wrap-around behaviour and improves test coverage.
  Adds normalization for ADC inputs. Introduces device-level support and examples for Lichen Bifocals.
  lichen-community-systemsgh-22: Refactors Lichen Medium device and examples for new host API.
  lichen-community-systemsgh-22: Working bare board test for Patch Init/Lichen Medium.
  lichen-community-systemsgh-22: Still broken but improved refactoring of Daisy host infrastructure.
  Safety commit of half-working refactoring of Daisy host infrastructure.
  lichen-community-systemsgh-22: Initial, partially-working refactoring of Host API for Daisy.
  lichen-community-systemsgh-67: Improves Moorer reverb example. Adds Dattoro's "industry standard" chorus/flanger/echo effect. Adds allpass interpolation to sig_DelayLine and a fast sine impl.
  ...
colinbdclark added a commit to colinbdclark/signaletic that referenced this issue Oct 10, 2024
@colinbdclark
lichen-community-systemsgh-63: Forks Ladder filter for Bifocals, addi…
5ddad81 
…ng inline wavefolding and saturation.

Renames sig_dsp_Sine to sig_dsp_SineOscillator.
Adds new signals for clamping, wavefolding, sine, and noise gating.
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@colinbdclark