Ivan Kravets 4881034ea3 Use tagged source code from repo		pirms 8 gadiem
examples	Add link to FFT log band scaling conversation & scripts	pirms 8 gadiem
extras	Len noticed a bug in binary velocity output	pirms 8 gadiem
gui	Fix AudioEffectFlange documentation	pirms 8 gadiem
utility	rewrite AudioAnalyzeRMS - arm math version doesn't work!	pirms 9 gadiem
.travis.yml	Update Travis CI settings	pirms 8 gadiem
Audio.h	Add CS4272 control (thanks William Hollender)	pirms 8 gadiem
AudioControl.h	Add AudioSynthWaveformSine	pirms 10 gadiem
README.md	remove Travis CI status from readme (it's too unreliable)	pirms 8 gadiem
analyze_fft256.cpp	Initial work on FFT256 for Teensy-LC (untested)	pirms 9 gadiem
analyze_fft256.h	Fix FFT read range (now inclusive)	pirms 9 gadiem
analyze_fft1024.cpp	Fix some Teensy-LC compiler errors	pirms 9 gadiem
analyze_fft1024.h	Fix FFT read range (now inclusive)	pirms 9 gadiem
analyze_notefreq.cpp	Rename AudioAnalyzeGuitarTuner to AudioAnalyzeNoteFrequency	pirms 9 gadiem
analyze_notefreq.h	Rename AudioAnalyzeGuitarTuner to AudioAnalyzeNoteFrequency	pirms 9 gadiem
analyze_peak.cpp	Add TODO for analyze peak optimization	pirms 8 gadiem
analyze_peak.h	Add readPeakToPeak() to AudioAnalyzePeak	pirms 9 gadiem
analyze_print.cpp	Change AudioAnalyzePrint name API	pirms 10 gadiem
analyze_print.h	Change AudioAnalyzePrint name API	pirms 10 gadiem
analyze_rms.cpp	Don't compile M4 code on LC (but LC still not working)	pirms 8 gadiem
analyze_rms.h	rewrite AudioAnalyzeRMS - arm math version doesn't work!	pirms 9 gadiem
analyze_tonedetect.cpp	Fix more Teensy-LC compiler errors	pirms 9 gadiem
analyze_tonedetect.h	Add MIT license	pirms 10 gadiem
control_ak4558.cpp	Fixed control functions, examples, GUI elements	pirms 9 gadiem
control_ak4558.h	Fixed control functions, examples, GUI elements	pirms 9 gadiem
control_cs4272.cpp	Add CS4272 control (thanks William Hollender)	pirms 8 gadiem
control_cs4272.h	Add CS4272 control (thanks William Hollender)	pirms 8 gadiem
control_sgtl5000.cpp	Add ability to control two SGTL5000 chips	pirms 8 gadiem
control_sgtl5000.h	Add ability to control two SGTL5000 chips	pirms 8 gadiem
control_wm8731.cpp	AudioControlWM8731::inputLevel(float n)	pirms 9 gadiem
control_wm8731.h	AudioControlWM8731::inputLevel(float n)	pirms 9 gadiem
data_ulaw.c	Add missing open source license headers	pirms 10 gadiem
data_waveforms.c	Remove old AudioSynthWaveform	pirms 10 gadiem
data_windows.c	Add other window types for 1024 point FFT	pirms 10 gadiem
effect_bitcrusher.cpp	Fix compiler warning	pirms 9 gadiem
effect_bitcrusher.h	Add Bitcrusher effect (thanks Pensive)	pirms 9 gadiem
effect_chorus.cpp	Remove debug Serial.print...	pirms 8 gadiem
effect_chorus.h	remove unimplemented stop()	pirms 10 gadiem
effect_delay.cpp	Remove unused multiplier	pirms 10 gadiem
effect_delay.h	Add AudioEffectDelay	pirms 10 gadiem
effect_delay_ext.cpp	Add support for Frank's 6-chip Memoryboard4 (AUDIO_MEMORY_MEMORYBOARD)	pirms 9 gadiem
effect_delay_ext.h	Add support for Frank's 6-chip Memoryboard4 (AUDIO_MEMORY_MEMORYBOARD)	pirms 9 gadiem
effect_envelope.cpp	Add AudioEffectEnvelope	pirms 10 gadiem
effect_envelope.h	Add AudioEffectEnvelope	pirms 10 gadiem
effect_fade.cpp	Add MIT license	pirms 10 gadiem
effect_fade.h	Add MIT license	pirms 10 gadiem
effect_flange.cpp	Change Flange effect to one channel	pirms 10 gadiem
effect_flange.h	remove unimplemented stop()	pirms 10 gadiem
effect_midside.cpp	Don't compile M4 code on LC (but LC still not working)	pirms 8 gadiem
effect_midside.h	Add AudioEffectMidSide (thanks Hedde Bosman)	pirms 9 gadiem
effect_multiply.cpp	Fix more Teensy-LC compiler errors	pirms 9 gadiem
effect_multiply.h	Add AudioEffectMultiply	pirms 10 gadiem
filter_biquad.cpp	Fix more Teensy-LC compiler errors	pirms 9 gadiem
filter_biquad.h	Improve Biquad filter	pirms 10 gadiem
filter_fir.cpp	Impove and document FIR filter	pirms 10 gadiem
filter_fir.h	Impove and document FIR filter	pirms 10 gadiem
filter_fir.md	Change FIR filter (as suggested by rheslip) to filter one channel instead of two. Updated example, added documenting file	pirms 10 gadiem
filter_variable.cpp	Fix more Teensy-LC compiler errors	pirms 9 gadiem
filter_variable.h	Finish AudioFilterStateVariable (signal control of corner frequency)	pirms 10 gadiem
input_adc.cpp	Fix some Teensy-LC compiler errors	pirms 9 gadiem
input_adc.h	Fix AudioInputAnalog	pirms 10 gadiem
input_i2s.cpp	Fix more Teensy-LC compiler errors	pirms 9 gadiem
input_i2s.h	Use DMAChannel begin()	pirms 10 gadiem
input_i2s_quad.cpp	More hardware defs	pirms 8 gadiem
input_i2s_quad.h	Begin work on quad channel audio input	pirms 8 gadiem
keywords.txt	Add CS4272 control (thanks William Hollender)	pirms 8 gadiem
library.json	Use tagged source code from repo	pirms 8 gadiem
library.properties	Increase to version 1.03	pirms 9 gadiem
memcpy_audio.S	More hardware defs	pirms 8 gadiem
memcpy_audio.h	Add memcpy_tointerleaveQuad (thanks Frank)	pirms 8 gadiem
mixer.cpp	Fix some Teensy-LC compiler errors	pirms 9 gadiem
mixer.h	Allow negative/inverting mixer gain	pirms 9 gadiem
multiplier.md	Add a multiplier (by rheslip)	pirms 10 gadiem
new_objects.md	change format for new_objects files	pirms 11 gadiem
output_dac.cpp	More hardware defs	pirms 8 gadiem
output_dac.h	Initial work on DAC for Teensy-LC (still incomplete)	pirms 9 gadiem
output_i2s.cpp	More hardware defs	pirms 8 gadiem
output_i2s.h	Use DMAChannel begin()	pirms 10 gadiem
output_i2s_quad.cpp	More hardware defs	pirms 8 gadiem
output_i2s_quad.h	Begin work on quad channel audio input	pirms 8 gadiem
output_pwm.cpp	Fix more Teensy-LC compiler errors	pirms 9 gadiem
output_pwm.h	Make input ADC and output DAC play nicely together	pirms 10 gadiem
output_spdif.cpp	More hardware defs	pirms 8 gadiem
output_spdif.h	Add keywords	pirms 9 gadiem
play_memory.cpp	Add status and position functions to AudioPlayMemory	pirms 10 gadiem
play_memory.h	Add status and position functions to AudioPlayMemory	pirms 10 gadiem
play_queue.cpp	do not forget - your own addition :-)	pirms 10 gadiem
play_queue.h	do not forget - your own addition :-)	pirms 10 gadiem
play_sd_raw.cpp	Do not disable all interrupts while opening RAW files	pirms 9 gadiem
play_sd_raw.h	Fix status functions in AudioPlaySdRaw	pirms 10 gadiem
play_sd_wav.cpp	Fix stereo WAV file startup & end (first and last 3 milliseconds)	pirms 9 gadiem
play_sd_wav.h	Fix audible click at end of Wav file playing	pirms 10 gadiem
play_serialflash_raw.cpp	remove leftover debug code from AudioPlaySerialflashRaw	pirms 9 gadiem
play_serialflash_raw.h	Add AudioPlaySerialflashRaw	pirms 9 gadiem
record_queue.cpp	Fix harmless compiler warnings in AudioRecordQueue	pirms 10 gadiem
record_queue.h	Finish AudioRecordQueue and Record example	pirms 10 gadiem
spi_interrupt.cpp	Add SPI interrupt registration layer	pirms 10 gadiem
spi_interrupt.h	register SPI interrupt when playing WAV & RAW files	pirms 10 gadiem
synth_dc.cpp	Add AudioSynthWaveformDc	pirms 10 gadiem
synth_dc.h	simplify overflow checks somewhat	pirms 10 gadiem
synth_pinknoise.cpp	Clean up harmless compiler warnings	pirms 10 gadiem
synth_pinknoise.h	Add AudioSynthNoisePink	pirms 10 gadiem
synth_sine.cpp	fix incorrect comment	pirms 8 gadiem
synth_sine.h	Add AudioSynthWaveformSineHires - High Precision Sine Wave	pirms 9 gadiem
synth_tonesweep.cpp	Bug fix so that downward tone sweeps will work.	pirms 8 gadiem
synth_tonesweep.h	Clean up harmless compiler warnings	pirms 10 gadiem
synth_waveform.cpp	#144: Add the reverse sawtooth and sample-and-hold waveforms.	pirms 9 gadiem
synth_waveform.h	#144: Add the reverse sawtooth and sample-and-hold waveforms.	pirms 9 gadiem
synth_waveform.md	Fixed AudioSynthWaveform. Uses LUT with linear interpolation for sinewave.	pirms 10 gadiem
synth_whitenoise.cpp	Fix more Teensy-LC compiler errors	pirms 9 gadiem
synth_whitenoise.h	Fix multiple white noise instances	pirms 10 gadiem

README.md

Teensy Audio Library

16 bit, 44.1 kHz streaming audio library for Teensy 3.x, featuring:

Polyphonic Playback
Recording
Synthesis
Analysis
Effects
Filtering
Mixing
Multiple Simultaneous Inputs & Outputs
Flexible signal routing between library objects
Automatic Streaming while your Arduino sketch runs

Main Audio Library Page

http://www.pjrc.com/teensy/td_libs_Audio.html

Audio System Design Tool

Use this graphical tool to design your audio project. Easily browse the library’s many features, connect objects, export to Arduino code, and quickly access details for the functions each object provides for you to control it from your Arduino sketch!

http://www.pjrc.com/teensy/gui/

Supported Hardware

Audio Adaptor Board for 16 bit stereo input and output.

Teensy 3.1 12 bit DAC

Teensy 3.1 or 3.0 ADC Input

Teensy 3.1 or 3.0 PWM Output