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PaulStoffregen 45dda0de35 Decay resonance (loop gain) slightly in Karplus Strong pirms 8 gadiem
examples Add more note & chord defs to Guitar example pirms 8 gadiem
extras Len noticed a bug in binary velocity output pirms 8 gadiem
gui Merge pull request #173 from Jacquot-SFE/master pirms 8 gadiem
utility Typo pirms 8 gadiem
.travis.yml Update Travis CI settings pirms 8 gadiem
Audio.h Add very basic Karplus-Strong synthesis 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 Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
analyze_fft1024.cpp Fix some Teensy-LC compiler errors pirms 9 gadiem
analyze_fft1024.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
analyze_notefreq.cpp Removed debug code, updated comments pirms 8 gadiem
analyze_notefreq.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
analyze_peak.cpp Add TODO for analyze peak optimization pirms 8 gadiem
analyze_peak.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
analyze_print.cpp Change AudioAnalyzePrint name API pirms 10 gadiem
analyze_print.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
analyze_rms.cpp Don't compile M4 code on LC (but LC still not working) pirms 8 gadiem
analyze_rms.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
analyze_tonedetect.cpp Fix more Teensy-LC compiler errors pirms 9 gadiem
analyze_tonedetect.h Do not assume AudioStream.h includes Arduino.h pirms 8 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 Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
effect_chorus.cpp Merge pull request #166 from FrankBoesing/patch-2 pirms 8 gadiem
effect_chorus.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
effect_delay.cpp Remove unused multiplier pirms 10 gadiem
effect_delay.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
effect_delay_ext.cpp Add SPI external memory timing comment pirms 8 gadiem
effect_delay_ext.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
effect_envelope.cpp Add AudioEffectEnvelope pirms 10 gadiem
effect_envelope.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
effect_fade.cpp Add MIT license pirms 10 gadiem
effect_fade.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
effect_flange.cpp use AUDIO_SAMPLE_RATE_EXACT pirms 8 gadiem
effect_flange.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
effect_midside.cpp Don't compile M4 code on LC (but LC still not working) pirms 8 gadiem
effect_midside.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
effect_multiply.cpp Fix more Teensy-LC compiler errors pirms 9 gadiem
effect_multiply.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
filter_biquad.cpp Don't cause a loud pop when changing biquad filter coefficients pirms 8 gadiem
filter_biquad.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
filter_fir.cpp Impove and document FIR filter pirms 10 gadiem
filter_fir.h Do not assume AudioStream.h includes Arduino.h pirms 8 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 Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
input_adc.cpp Fix some Teensy-LC compiler errors pirms 9 gadiem
input_adc.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
input_i2s.cpp Fix more Teensy-LC compiler errors pirms 9 gadiem
input_i2s.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
input_i2s_quad.cpp More hardware defs pirms 8 gadiem
input_i2s_quad.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
keywords.txt Add Synthesis Guitar example 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 Do not assume AudioStream.h includes Arduino.h pirms 8 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 Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
output_i2s.cpp Be more careful when configuring MCLK pirms 8 gadiem
output_i2s.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
output_i2s_quad.cpp Be more careful when configuring MCLK pirms 8 gadiem
output_i2s_quad.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
output_pwm.cpp Fix more Teensy-LC compiler errors pirms 9 gadiem
output_pwm.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
output_spdif.cpp Be more careful when configuring MCLK pirms 8 gadiem
output_spdif.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
play_memory.cpp Add status and position functions to AudioPlayMemory pirms 10 gadiem
play_memory.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
play_queue.cpp do not forget - your own addition :-) pirms 10 gadiem
play_queue.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
play_sd_raw.cpp Do not disable all interrupts while opening RAW files pirms 9 gadiem
play_sd_raw.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
play_sd_wav.cpp Fix stereo WAV file startup & end (first and last 3 milliseconds) pirms 9 gadiem
play_sd_wav.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
play_serialflash_raw.cpp remove leftover debug code from AudioPlaySerialflashRaw pirms 9 gadiem
play_serialflash_raw.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
record_queue.cpp Fix harmless compiler warnings in AudioRecordQueue pirms 10 gadiem
record_queue.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
spi_interrupt.cpp Add SPI interrupt registration layer pirms 10 gadiem
spi_interrupt.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
synth_dc.cpp Add AudioSynthWaveformDc pirms 10 gadiem
synth_dc.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
synth_karplusstrong.cpp Decay resonance (loop gain) slightly in Karplus Strong pirms 8 gadiem
synth_karplusstrong.h Add Synthesis Guitar example pirms 8 gadiem
synth_pinknoise.cpp Clean up harmless compiler warnings pirms 10 gadiem
synth_pinknoise.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
synth_simple_drum.cpp Adding SimpleDrum synthesis object to audio library. pirms 8 gadiem
synth_simple_drum.h Adding SimpleDrum synthesis object to audio library. pirms 8 gadiem
synth_sine.cpp fix incorrect comment pirms 8 gadiem
synth_sine.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
synth_tonesweep.cpp fix tonesweep pirms 8 gadiem
synth_tonesweep.h Do not assume AudioStream.h includes Arduino.h pirms 8 gadiem
synth_waveform.cpp #144: Add the reverse sawtooth and sample-and-hold waveforms. pirms 9 gadiem
synth_waveform.h Do not assume AudioStream.h includes Arduino.h pirms 8 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 Do not assume AudioStream.h includes Arduino.h pirms 8 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.

Inputs Outputs

Teensy 3.1 12 bit DAC

DAC Output

Teensy 3.1 or 3.0 ADC Input

ADC Input

Teensy 3.1 or 3.0 PWM Output

PWM Output