initial commit

.gitignore

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+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

include/README

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+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

lib/Audio_-_Adafruit_Fork/Audio.h

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+/* Audio Library for Teensy 3.X
+ * Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
+ *
+ * Development of this audio library was funded by PJRC.COM, LLC by sales of
+ * Teensy and Audio Adaptor boards.  Please support PJRC's efforts to develop
+ * open source software by purchasing Teensy or other PJRC products.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice, development funding notice, and this permission
+ * notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef Audio_h_
+#define Audio_h_
+
+#if 0
+
+#if TEENSYDUINO < 120
+#error "Teensyduino version 1.20 or later is required to compile the Audio library."
+#endif
+#ifdef __AVR__
+#error "The Audio Library only works with Teensy 3.X.  Teensy 2.0 is unsupported."
+#endif
+
+#include "DMAChannel.h"
+#if !defined(DMACHANNEL_HAS_BEGIN) || !defined(DMACHANNEL_HAS_BOOLEAN_CTOR)
+#error "You need to update DMAChannel.h & DMAChannel.cpp"
+#error "https://github.com/PaulStoffregen/cores/blob/master/teensy3/DMAChannel.h"
+#error "https://github.com/PaulStoffregen/cores/blob/master/teensy3/DMAChannel.cpp"
+#endif
+
+#endif //0
+
+// When changing multiple audio object settings that must update at
+// the same time, these functions allow the audio library interrupt
+// to be disabled.  For example, you may wish to begin playing a note
+// in response to reading an analog sensor.  If you have "velocity"
+// information, you might start the sample playing and also adjust
+// the gain of a mixer channel.  Use AudioNoInterrupts() first, then
+// make both changes to the 2 separate objects.  Then allow the audio
+// library to update with AudioInterrupts().  Both changes will happen
+// at the same time, because AudioNoInterrupts() prevents any updates
+// while you make changes.
+//
+
+#define AudioNoInterrupts() (NVIC_DISABLE_IRQ(IRQ_SOFTWARE))
+#define AudioInterrupts()   (NVIC_ENABLE_IRQ(IRQ_SOFTWARE))
+
+// include all the library headers, so a sketch can use a single
+// #include <Audio.h> to get the whole library
+//
+#include "analyze_fft256.h"
+#include "analyze_fft1024.h"
+#include "analyze_print.h"
+#include "analyze_tonedetect.h"
+#include "analyze_notefreq.h"
+#include "analyze_peak.h"
+#include "analyze_rms.h"
+#include "control_sgtl5000.h"
+#include "control_wm8731.h"
+#include "control_ak4558.h"
+#include "control_cs4272.h"
+#include "control_cs42448.h"
+#include "effect_bitcrusher.h"
+#include "effect_chorus.h"
+#include "effect_fade.h"
+#include "effect_flange.h"
+#include "effect_envelope.h"
+#include "effect_multiply.h"
+#include "effect_delay.h"
+#include "effect_delay_ext.h"
+
+#include "effect_midside.h"
+#include "effect_reverb.h"
+#include "effect_waveshaper.h"
+#include "filter_biquad.h"
+#include "filter_fir.h"
+#include "filter_variable.h"
+#include "input_adcs.h"
+
+#if I2S_INTERFACES_COUNT > 0
+#include "input_i2s.h"
+#endif
+
+#if 0
+#include "input_adc.h"
+#include "input_i2s_quad.h"
+#include "input_tdm.h"
+#endif //0
+
+#include "mixer.h"
+#include "output_dacs.h"
+
+#if I2S_INTERFACES_COUNT > 0
+#include "output_i2s.h"
+#endif
+
+#if 0
+#include "output_dac.h"
+#include "output_i2s_quad.h"
+#include "output_pwm.h"
+#include "output_spdif.h"
+#include "output_pt8211.h"
+#include "output_tdm.h"
+#include "play_sd_raw.h"
+#include "play_sd_wav.h"
+#include "play_qspi_wav.h"
+#endif //0
+
+#include "play_memory.h"
+#include "play_queue.h"
+
+
+#if 0
+#include "play_serialflash_raw.h"
+#endif //0
+
+#include "record_queue.h"
+#include "synth_tonesweep.h"
+#include "synth_sine.h"
+#include "synth_waveform.h"
+#include "synth_dc.h"
+#include "synth_whitenoise.h"
+#include "synth_pinknoise.h"
+#include "synth_karplusstrong.h"
+#include "synth_simple_drum.h"
+#include "synth_pwm.h"
+
+#endif

lib/Audio_-_Adafruit_Fork/AudioControl.h

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+/* Audio Library for Teensy 3.X
+ * Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
+ *
+ * Development of this audio library was funded by PJRC.COM, LLC by sales of
+ * Teensy and Audio Adaptor boards.  Please support PJRC's efforts to develop
+ * open source software by purchasing Teensy or other PJRC products.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice, development funding notice, and this permission
+ * notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef AudioControl_h_
+#define AudioControl_h_
+
+#include <stdint.h>
+
+// A base class for all Codecs, DACs and ADCs, so at least the
+// most basic functionality is consistent.
+
+#define AUDIO_INPUT_LINEIN  0
+#define AUDIO_INPUT_MIC     1
+
+class AudioControl
+{
+public:
+	virtual bool enable(void) = 0;
+	virtual bool disable(void) = 0;
+	virtual bool volume(float volume) = 0;      // volume 0.0 to 1.0
+	virtual bool inputLevel(float volume) = 0;  // volume 0.0 to 1.0
+	virtual bool inputSelect(int n) = 0;
+};
+
+#endif