Add BlockBiquad shelf & peaking, AudioFilter support

ports/atmel-samd/boards/pybadge/mpconfigboard.mk

@@ -21,3 +21,13 @@ CIRCUITPY_PARALLELDISPLAYBUS= 0
 CIRCUITPY_STAGE = 1
 
 FROZEN_MPY_DIRS += $(TOP)/frozen/circuitpython-stage/pybadge
+
+# We don't have room for the fonts for terminalio for certain languages,
+# so turn off terminalio, and if it's off and displayio is on,
+# force a clean build.
+# Note that we cannot test $(CIRCUITPY_DISPLAYIO) directly with an
+# ifeq, because it's not set yet.
+ifneq (,$(filter $(TRANSLATION),ja ko ru))
+CIRCUITPY_TERMINALIO = 0
+RELEASE_NEEDS_CLEAN_BUILD = $(CIRCUITPY_DISPLAYIO)
+endif

ports/atmel-samd/boards/pygamer/mpconfigboard.mk

@@ -21,3 +21,13 @@ CIRCUITPY_PARALLELDISPLAYBUS= 0
 CIRCUITPY_STAGE = 1
 
 FROZEN_MPY_DIRS += $(TOP)/frozen/circuitpython-stage/pygamer
+
+# We don't have room for the fonts for terminalio for certain languages,
+# so turn off terminalio, and if it's off and displayio is on,
+# force a clean build.
+# Note that we cannot test $(CIRCUITPY_DISPLAYIO) directly with an
+# ifeq, because it's not set yet.
+ifneq (,$(filter $(TRANSLATION),ja ko ru))
+CIRCUITPY_TERMINALIO = 0
+RELEASE_NEEDS_CLEAN_BUILD = $(CIRCUITPY_DISPLAYIO)
+endif

shared-bindings/audiofilters/Filter.c

@@ -24,7 +24,7 @@
 //|
 //|     def __init__(
 //|         self,
-//|         filter: Optional[synthio.Biquad | Tuple[synthio.Biquad]] = None,
+//|         filter: Optional[synthio.AnyBiquad | Tuple[synthio.AnyBiquad]] = None,
 //|         mix: synthio.BlockInput = 1.0,
 //|         buffer_size: int = 512,
 //|         sample_rate: int = 8000,
@@ -39,7 +39,7 @@
 //|            The mix parameter allows you to change how much of the unchanged sample passes through to
 //|            the output to how much of the effect audio you hear as the output.
 //|
-//|         :param Optional[synthio.Biquad|Tuple[synthio.Biquad]] filter: A normalized biquad filter object or tuple of normalized biquad filter objects. The sample is processed sequentially by each filter to produce the output samples.
+//|         :param Optional[synthio.AnyBiquad|Tuple[synthio.AnyBiquad]] filter: A normalized biquad filter object or tuple of normalized biquad filter objects. The sample is processed sequentially by each filter to produce the output samples.
 //|         :param synthio.BlockInput mix: The mix as a ratio of the sample (0.0) to the effect (1.0).
 //|         :param int buffer_size: The total size in bytes of each of the two playback buffers to use
 //|         :param int sample_rate: The sample rate to be used
@@ -73,7 +73,7 @@
 static mp_obj_t audiofilters_filter_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
     enum { ARG_filter, ARG_mix, ARG_buffer_size, ARG_sample_rate, ARG_bits_per_sample, ARG_samples_signed, ARG_channel_count, };
     static const mp_arg_t allowed_args[] = {
-        { MP_QSTR_filter, MP_ARG_OBJ | MP_ARG_KW_ONLY, {.u_obj = MP_OBJ_NULL} },
+        { MP_QSTR_filter, MP_ARG_OBJ | MP_ARG_KW_ONLY, {.u_obj = MP_ROM_NONE } },
         { MP_QSTR_mix, MP_ARG_OBJ | MP_ARG_KW_ONLY,  {.u_obj = MP_ROM_INT(1)} },
         { MP_QSTR_buffer_size, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 512} },
         { MP_QSTR_sample_rate, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 8000} },
@@ -132,7 +132,7 @@ static mp_obj_t audiofilters_filter_obj___exit__(size_t n_args, const mp_obj_t *
 static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audiofilters_filter___exit___obj, 4, 4, audiofilters_filter_obj___exit__);
 
 
-//|     filter: synthio.Biquad | Tuple[synthio.Biquad] | None
+//|     filter: synthio.AnyBiquad | Tuple[synthio.AnyBiquad] | None
 //|     """A normalized biquad filter object or tuple of normalized biquad filter objects. The sample is processed sequentially by each filter to produce the output samples."""
 //|
 static mp_obj_t audiofilters_filter_obj_get_filter(mp_obj_t self_in) {

shared-bindings/synthio/Biquad.c

@@ -47,6 +47,8 @@ static const mp_arg_t biquad_properties[] = {
 //|         rather than directly from coefficients.
 //|
 //|         https://github.com/WebAudio/Audio-EQ-Cookbook/blob/main/Audio-EQ-Cookbook.txt
+//|
+//|         .. note:: This is deprecated in ``9.x.x`` and will be removed in ``10.0.0``. Use `BlockBiquad` objects instead.
 //|         """
 //|
 //|

shared-bindings/synthio/BlockBiquad.c

@@ -21,19 +21,31 @@
 //|     """A band-pass filter"""
 //|     NOTCH: FilterMode
 //|     """A notch filter"""
+//|     LOW_SHELF: FilterMode
+//|     """A notch filter"""
+//|     HIGH_SHELF: FilterMode
+//|     """A notch filter"""
+//|     PEAKING_EQ: FilterMode
+//|     """A notch filter"""
 //|
 //|
 
 MAKE_ENUM_VALUE(synthio_filter_mode_type, mode, LOW_PASS, SYNTHIO_LOW_PASS);
 MAKE_ENUM_VALUE(synthio_filter_mode_type, mode, HIGH_PASS, SYNTHIO_HIGH_PASS);
 MAKE_ENUM_VALUE(synthio_filter_mode_type, mode, BAND_PASS, SYNTHIO_BAND_PASS);
 MAKE_ENUM_VALUE(synthio_filter_mode_type, mode, NOTCH, SYNTHIO_NOTCH);
+MAKE_ENUM_VALUE(synthio_filter_mode_type, mode, LOW_SHELF, SYNTHIO_LOW_SHELF);
+MAKE_ENUM_VALUE(synthio_filter_mode_type, mode, HIGH_SHELF, SYNTHIO_HIGH_SHELF);
+MAKE_ENUM_VALUE(synthio_filter_mode_type, mode, PEAKING_EQ, SYNTHIO_PEAKING_EQ);
 
 MAKE_ENUM_MAP(synthio_filter_mode) {
     MAKE_ENUM_MAP_ENTRY(mode, LOW_PASS),
     MAKE_ENUM_MAP_ENTRY(mode, HIGH_PASS),
     MAKE_ENUM_MAP_ENTRY(mode, BAND_PASS),
     MAKE_ENUM_MAP_ENTRY(mode, NOTCH),
+    MAKE_ENUM_MAP_ENTRY(mode, LOW_SHELF),
+    MAKE_ENUM_MAP_ENTRY(mode, HIGH_SHELF),
+    MAKE_ENUM_MAP_ENTRY(mode, PEAKING_EQ),
 };
 
 static MP_DEFINE_CONST_DICT(synthio_filter_mode_locals_dict, synthio_filter_mode_locals_table);
@@ -52,8 +64,17 @@ static synthio_filter_mode validate_synthio_filter_mode(mp_obj_t obj, qstr arg_n
 //|         mode: FilterMode,
 //|         frequency: BlockInput,
 //|         Q: BlockInput = 0.7071067811865475,
+//|         A: BlockInput = None,
 //|     ) -> None:
-//|         """Construct a biquad filter object with dynamic center frequency & q factor
+//|         """Construct a biquad filter object with given settings.
+//|
+//|         ``frequency`` gives the center frequency or corner frequency of the filter,
+//|         depending on the mode.
+//|
+//|         ``Q`` gives the gain or sharpness of the filter.
+//|
+//|         ``A`` controls the gain of peaking and shelving filters according to the
+//|         formula ``A = 10^(dBgain/40)``. For other filter types it is ignored.
 //|
 //|         Since ``frequency`` and ``Q`` are `BlockInput` objects, they can
 //|         be varied dynamically. Internally, this is evaluated as "direct form 1"
@@ -70,6 +91,7 @@ static const mp_arg_t block_biquad_properties[] = {
     { MP_QSTR_mode, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = MP_OBJ_NULL } },
     { MP_QSTR_frequency, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = MP_OBJ_NULL } },
     { MP_QSTR_Q, MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL } },
+    { MP_QSTR_A, MP_ARG_OBJ, {.u_obj = MP_ROM_NONE } },
 };
 
 static mp_obj_t synthio_block_biquad_make_new(const mp_obj_type_t *type_in, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
@@ -83,7 +105,9 @@ static mp_obj_t synthio_block_biquad_make_new(const mp_obj_type_t *type_in, size
     }
 
     synthio_filter_mode mode = validate_synthio_filter_mode(args[ARG_mode].u_obj, MP_QSTR_mode);
-    return common_hal_synthio_block_biquad_new(mode, args[ARG_frequency].u_obj, args[ARG_Q].u_obj);
+    mp_obj_t result = common_hal_synthio_block_biquad_new(mode);
+    properties_construct_helper(result, block_biquad_properties + 1, args + 1, MP_ARRAY_SIZE(block_biquad_properties) - 1);
+    return result;
 }
 
 //|
@@ -122,7 +146,6 @@ MP_PROPERTY_GETSET(synthio_block_biquad_frequency_obj,
 //|     Q: BlockInput
 //|     """The sharpness (Q) of the filter"""
 //|
-//|
 static mp_obj_t synthio_block_biquad_get_Q(mp_obj_t self_in) {
     synthio_block_biquad_t *self = MP_OBJ_TO_PTR(self_in);
     return common_hal_synthio_block_biquad_get_Q(self);
@@ -139,10 +162,36 @@ MP_PROPERTY_GETSET(synthio_block_biquad_Q_obj,
     (mp_obj_t)&synthio_block_biquad_get_Q_obj,
     (mp_obj_t)&synthio_block_biquad_set_Q_obj);
 
+//|
+//|     A: BlockInput
+//|     """The gain (A) of the filter
+//|
+//|     This setting only has an effect for peaking and shelving EQ filters. It is related
+//|     to the filter gain according to the formula ``A = 10^(dBgain/40)``.
+//|     """
+//|
+//|
+static mp_obj_t synthio_block_biquad_get_A(mp_obj_t self_in) {
+    synthio_block_biquad_t *self = MP_OBJ_TO_PTR(self_in);
+    return common_hal_synthio_block_biquad_get_A(self);
+}
+MP_DEFINE_CONST_FUN_OBJ_1(synthio_block_biquad_get_A_obj, synthio_block_biquad_get_A);
+
+static mp_obj_t synthio_block_biquad_set_A(mp_obj_t self_in, mp_obj_t arg) {
+    synthio_block_biquad_t *self = MP_OBJ_TO_PTR(self_in);
+    common_hal_synthio_block_biquad_set_A(self, arg);
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_2(synthio_block_biquad_set_A_obj, synthio_block_biquad_set_A);
+MP_PROPERTY_GETSET(synthio_block_biquad_A_obj,
+    (mp_obj_t)&synthio_block_biquad_get_A_obj,
+    (mp_obj_t)&synthio_block_biquad_set_A_obj);
+
 static const mp_rom_map_elem_t synthio_block_biquad_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_mode), MP_ROM_PTR(&synthio_block_biquad_mode_obj) },
     { MP_ROM_QSTR(MP_QSTR_frequency), MP_ROM_PTR(&synthio_block_biquad_frequency_obj) },
     { MP_ROM_QSTR(MP_QSTR_Q), MP_ROM_PTR(&synthio_block_biquad_Q_obj) },
+    { MP_ROM_QSTR(MP_QSTR_A), MP_ROM_PTR(&synthio_block_biquad_A_obj) },
 };
 static MP_DEFINE_CONST_DICT(synthio_block_biquad_locals_dict, synthio_block_biquad_locals_dict_table);
 

shared-bindings/synthio/BlockBiquad.h

@@ -13,10 +13,15 @@ extern const mp_obj_type_t synthio_filter_mode_type;
 typedef struct synthio_block_biquad synthio_block_biquad_t;
 
 typedef enum {
-    SYNTHIO_LOW_PASS, SYNTHIO_HIGH_PASS, SYNTHIO_BAND_PASS, SYNTHIO_NOTCH
+    SYNTHIO_LOW_PASS, SYNTHIO_HIGH_PASS, SYNTHIO_BAND_PASS, SYNTHIO_NOTCH,
+    // filters beyond this line use the "A" parameter (in addition to f0 and Q)
+    SYNTHIO_PEAKING_EQ, SYNTHIO_LOW_SHELF, SYNTHIO_HIGH_SHELF
 } synthio_filter_mode;
 
 
+mp_obj_t common_hal_synthio_block_biquad_get_A(synthio_block_biquad_t *self);
+void common_hal_synthio_block_biquad_set_A(synthio_block_biquad_t *self, mp_obj_t A);
+
 mp_obj_t common_hal_synthio_block_biquad_get_Q(synthio_block_biquad_t *self);
 void common_hal_synthio_block_biquad_set_Q(synthio_block_biquad_t *self, mp_obj_t Q);
 
@@ -25,4 +30,4 @@ void common_hal_synthio_block_biquad_set_frequency(synthio_block_biquad_t *self,
 
 synthio_filter_mode common_hal_synthio_block_biquad_get_mode(synthio_block_biquad_t *self);
 
-mp_obj_t common_hal_synthio_block_biquad_new(synthio_filter_mode mode, mp_obj_t frequency, mp_obj_t Q);
+mp_obj_t common_hal_synthio_block_biquad_new(synthio_filter_mode mode);

shared-bindings/synthio/LFO.c

@@ -34,7 +34,7 @@ static const uint16_t triangle[] = {0, 32767, 0, -32767};
 //|     including indirectly via a `Note` or another intermediate LFO.
 //|
 //|     Using the same LFO as an input to multiple other LFOs or Notes is OK, but
-//|     the result if an LFO is tied to multiple Synthtesizer objects is undefined.
+//|     the result if an LFO is tied to multiple `Synthesizer` objects is undefined.
 //|
 //|     In the current implementation, LFOs are updated every 256 samples. This
 //|     should be considered an implementation detail, though it affects how LFOs

shared-bindings/synthio/Math.c

@@ -123,7 +123,7 @@ MAKE_ENUM_TYPE(synthio, MathOperation, synthio_math_operation,
 //|     including indirectly via a `Note` or another intermediate Math.
 //|
 //|     Using the same Math as an input to multiple other Maths or Notes is OK, but
-//|     the result if an Math is tied to multiple Synthtesizer objects is undefined.
+//|     the result if an Math is tied to multiple `Synthesizer` objects is undefined.
 //|
 //|     In the current implementation, Maths are updated every 256 samples. This
 //|     should be considered an implementation detail.

shared-bindings/synthio/Note.c

@@ -42,7 +42,7 @@ static const mp_arg_t note_properties[] = {
 //|         envelope: Optional[Envelope] = None,
 //|         amplitude: BlockInput = 1.0,
 //|         bend: BlockInput = 0.0,
-//|         filter: Optional[Biquad] = None,
+//|         filter: Optional[AnyBiquad] = None,
 //|         ring_frequency: float = 0.0,
 //|         ring_bend: float = 0.0,
 //|         ring_waveform: Optional[ReadableBuffer] = None,
@@ -86,7 +86,7 @@ MP_PROPERTY_GETSET(synthio_note_frequency_obj,
     (mp_obj_t)&synthio_note_get_frequency_obj,
     (mp_obj_t)&synthio_note_set_frequency_obj);
 
-//|     filter: Optional[Biquad]
+//|     filter: Optional[AnyBiquad]
 //|     """If not None, the output of this Note is filtered according to the provided coefficients.
 //|
 //|     Construct an appropriate filter by calling a filter-making method on the

shared-bindings/synthio/Synthesizer.c

@@ -295,6 +295,8 @@ MP_PROPERTY_GETTER(synthio_synthesizer_blocks_obj,
 //|         of the filter.
 //|
 //|         ``Q`` controls how peaked the response will be at the cutoff frequency. A large value makes the response more peaked.
+//|
+//|         .. note:: This is deprecated in ``9.x.x`` and will be removed in ``10.0.0``. Use `BlockBiquad` objects instead.
 //|         """
 //|
 
@@ -337,6 +339,8 @@ MP_DEFINE_CONST_FUN_OBJ_KW(synthio_synthesizer_lpf_fun_obj, 1, synthio_synthesiz
 //|         of the filter.
 //|
 //|         ``Q`` controls how peaked the response will be at the cutoff frequency. A large value makes the response more peaked.
+//|
+//|         .. note:: This is deprecated in ``9.x.x`` and will be removed in ``10.0.0``. Use `BlockBiquad` objects instead.
 //|         """
 //|
 
@@ -368,6 +372,8 @@ static mp_obj_t synthio_synthesizer_hpf(size_t n_pos, const mp_obj_t *pos_args,
 //|         ``Q`` Controls how peaked the response will be at the cutoff frequency. A large value makes the response more peaked.
 //|
 //|         The coefficients are scaled such that the filter has a 0dB peak gain.
+//|
+//|         .. note:: This is deprecated in ``9.x.x`` and will be removed in ``10.0.0``. Use `BlockBiquad` objects instead.
 //|         """
 //|
 //|

shared-bindings/synthio/__init__.c

@@ -32,8 +32,10 @@
 //| At least 2 simultaneous notes are supported.  samd5x, mimxrt10xx and rp2040 platforms support up to 12 notes.
 //| """
 //|
-//|
 
+//| AnyBiquad = Union["Biquad", "BlockBiquad"]
+//|
+//|
 //| class EnvelopeState:
 //|     ATTACK: EnvelopeState
 //|     """The note is in its attack phase"""