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audio Flanger FX implementation #11175

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7d1fa89
audio Flanger FX
FoamyGuy Aug 4, 2026
d6b0cb2
fix unix port build
FoamyGuy Aug 4, 2026
0738583
disable audioeffects for pico_dv_base_w
FoamyGuy Aug 4, 2026
bbe4ec6
rename delay_ms to min_delay_ms, remove unneeded returns
FoamyGuy Aug 5, 2026
305dfe1
lfo_value property
FoamyGuy Aug 5, 2026
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1 change: 1 addition & 0 deletions ports/raspberrypi/boards/pimoroni_pico_dv_base_w/mpconfigboard.mk
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@ CIRCUITPY_SOCKETPOOL = 1
CIRCUITPY_WIFI = 1

CIRCUITPY_PICODVI = 1
CIRCUITPY_AUDIOEFFECTS = 0
CIRCUITPY_AUDIOFILEWRITER = 0
CIRCUITPY_BLEIO_HCI = 0

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2 changes: 2 additions & 0 deletions ports/unix/variants/coverage/mpconfigvariant.mk
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Expand Up @@ -39,6 +39,7 @@ SRC_BITMAP := \
shared-bindings/audiodelays/PitchShift.c \
shared-bindings/audiodelays/GranularPitchShift.c \
shared-bindings/audiodelays/MultiTapDelay.c \
shared-bindings/audiodelays/Flanger.c \
shared-bindings/audiodelays/__init__.c \
shared-bindings/audiofilters/Distortion.c \
shared-bindings/audiofilters/Filter.c \
Expand Down Expand Up @@ -88,6 +89,7 @@ SRC_BITMAP := \
shared-module/audiodelays/PitchShift.c \
shared-module/audiodelays/GranularPitchShift.c \
shared-module/audiodelays/MultiTapDelay.c \
shared-module/audiodelays/Flanger.c \
shared-module/audiodelays/__init__.c \
shared-module/audiofilters/Distortion.c \
shared-module/audiofilters/Filter.c \
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1 change: 1 addition & 0 deletions py/circuitpy_defns.mk
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Expand Up @@ -712,6 +712,7 @@ SRC_SHARED_MODULE_ALL = \
audiospeed/__init__.c \
audiodelays/Echo.c \
audiodelays/Chorus.c \
audiodelays/Flanger.c \
audiodelays/PitchShift.c \
audiodelays/GranularPitchShift.c \
audiodelays/MultiTapDelay.c \
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389 changes: 389 additions & 0 deletions shared-bindings/audiodelays/Flanger.c
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43 changes: 43 additions & 0 deletions shared-bindings/audiodelays/Flanger.h
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Original file line number Diff line number Diff line change
@@ -0,0 +1,43 @@
// This file is part of the CircuitPython project: https://circuitpython.org
//
// SPDX-FileCopyrightText: Copyright (c) 2026 Tim Cocks for Adafruit Industries
//
// SPDX-License-Identifier: MIT

#pragma once

#include "shared-module/audiodelays/Flanger.h"

extern const mp_obj_type_t audiodelays_flanger_type;

void common_hal_audiodelays_flanger_construct(audiodelays_flanger_obj_t *self, uint32_t max_delay_ms,
mp_obj_t min_delay_ms, mp_obj_t rate, mp_obj_t depth, mp_obj_t feedback, mp_obj_t mix, bool invert,
uint32_t buffer_size, uint8_t bits_per_sample,
bool samples_signed, uint8_t channel_count, uint32_t sample_rate);

void common_hal_audiodelays_flanger_deinit(audiodelays_flanger_obj_t *self);
bool common_hal_audiodelays_flanger_deinited(audiodelays_flanger_obj_t *self);

mp_obj_t common_hal_audiodelays_flanger_get_min_delay_ms(audiodelays_flanger_obj_t *self);
void common_hal_audiodelays_flanger_set_min_delay_ms(audiodelays_flanger_obj_t *self, mp_obj_t min_delay_ms);

mp_obj_t common_hal_audiodelays_flanger_get_rate(audiodelays_flanger_obj_t *self);
void common_hal_audiodelays_flanger_set_rate(audiodelays_flanger_obj_t *self, mp_obj_t rate);

mp_obj_t common_hal_audiodelays_flanger_get_depth(audiodelays_flanger_obj_t *self);
void common_hal_audiodelays_flanger_set_depth(audiodelays_flanger_obj_t *self, mp_obj_t depth);

mp_obj_t common_hal_audiodelays_flanger_get_feedback(audiodelays_flanger_obj_t *self);
void common_hal_audiodelays_flanger_set_feedback(audiodelays_flanger_obj_t *self, mp_obj_t feedback);

mp_obj_t common_hal_audiodelays_flanger_get_mix(audiodelays_flanger_obj_t *self);
void common_hal_audiodelays_flanger_set_mix(audiodelays_flanger_obj_t *self, mp_obj_t arg);

mp_float_t common_hal_audiodelays_flanger_get_lfo_value(audiodelays_flanger_obj_t *self);

bool common_hal_audiodelays_flanger_get_invert(audiodelays_flanger_obj_t *self);
void common_hal_audiodelays_flanger_set_invert(audiodelays_flanger_obj_t *self, bool invert);

bool common_hal_audiodelays_flanger_get_playing(audiodelays_flanger_obj_t *self);
void common_hal_audiodelays_flanger_play(audiodelays_flanger_obj_t *self, mp_obj_t sample, bool loop);
void common_hal_audiodelays_flanger_stop(audiodelays_flanger_obj_t *self);
2 changes: 2 additions & 0 deletions shared-bindings/audiodelays/__init__.c
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@
#include "shared-bindings/audiodelays/__init__.h"
#include "shared-bindings/audiodelays/Echo.h"
#include "shared-bindings/audiodelays/Chorus.h"
#include "shared-bindings/audiodelays/Flanger.h"
#include "shared-bindings/audiodelays/PitchShift.h"
#include "shared-bindings/audiodelays/GranularPitchShift.h"
#include "shared-bindings/audiodelays/MultiTapDelay.h"
Expand All @@ -26,6 +27,7 @@ static const mp_rom_map_elem_t audiodelays_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_audiodelays) },
{ MP_ROM_QSTR(MP_QSTR_Echo), MP_ROM_PTR(&audiodelays_echo_type) },
{ MP_ROM_QSTR(MP_QSTR_Chorus), MP_ROM_PTR(&audiodelays_chorus_type) },
{ MP_ROM_QSTR(MP_QSTR_Flanger), MP_ROM_PTR(&audiodelays_flanger_type) },
{ MP_ROM_QSTR(MP_QSTR_PitchShift), MP_ROM_PTR(&audiodelays_pitch_shift_type) },
{ MP_ROM_QSTR(MP_QSTR_GranularPitchShift), MP_ROM_PTR(&audiodelays_granular_pitch_shift_type) },
{ MP_ROM_QSTR(MP_QSTR_MultiTapDelay), MP_ROM_PTR(&audiodelays_multi_tap_delay_type) },
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