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Frank e5df3287eb Optimize CPU Usage il y a 8 ans
examples Document FIR filter requirements, fixes #114 il y a 8 ans
extras Len noticed a bug in binary velocity output il y a 8 ans
gui Update maximum delay recommendations il y a 8 ans
utility Access Q-bitn from c il y a 8 ans
.travis.yml Update Travis CI settings il y a 8 ans
Audio.h Add CS4272 control (thanks William Hollender) il y a 8 ans
AudioControl.h Add AudioSynthWaveformSine il y a 10 ans
README.md remove Travis CI status from readme (it's too unreliable) il y a 8 ans
analyze_fft256.cpp Initial work on FFT256 for Teensy-LC (untested) il y a 9 ans
analyze_fft256.h Fix FFT read range (now inclusive) il y a 9 ans
analyze_fft1024.cpp Fix some Teensy-LC compiler errors il y a 9 ans
analyze_fft1024.h Fix FFT read range (now inclusive) il y a 9 ans
analyze_notefreq.cpp Rename AudioAnalyzeGuitarTuner to AudioAnalyzeNoteFrequency il y a 9 ans
analyze_notefreq.h Rename AudioAnalyzeGuitarTuner to AudioAnalyzeNoteFrequency il y a 9 ans
analyze_peak.cpp Add TODO for analyze peak optimization il y a 8 ans
analyze_peak.h Add readPeakToPeak() to AudioAnalyzePeak il y a 8 ans
analyze_print.cpp Change AudioAnalyzePrint name API il y a 10 ans
analyze_print.h Change AudioAnalyzePrint name API il y a 10 ans
analyze_rms.cpp Don't compile M4 code on LC (but LC still not working) il y a 8 ans
analyze_rms.h rewrite AudioAnalyzeRMS - arm math version doesn't work! il y a 8 ans
analyze_tonedetect.cpp Fix more Teensy-LC compiler errors il y a 9 ans
analyze_tonedetect.h Add MIT license il y a 10 ans
control_ak4558.cpp Fixed control functions, examples, GUI elements il y a 9 ans
control_ak4558.h Fixed control functions, examples, GUI elements il y a 9 ans
control_cs4272.cpp Add CS4272 control (thanks William Hollender) il y a 8 ans
control_cs4272.h Add CS4272 control (thanks William Hollender) il y a 8 ans
control_sgtl5000.cpp Add ability to control two SGTL5000 chips il y a 8 ans
control_sgtl5000.h Add ability to control two SGTL5000 chips il y a 8 ans
control_wm8731.cpp AudioControlWM8731::inputLevel(float n) il y a 9 ans
control_wm8731.h AudioControlWM8731::inputLevel(float n) il y a 9 ans
data_ulaw.c Add missing open source license headers il y a 10 ans
data_waveforms.c Remove old AudioSynthWaveform il y a 10 ans
data_windows.c Add other window types for 1024 point FFT il y a 10 ans
effect_bitcrusher.cpp Fix compiler warning il y a 9 ans
effect_bitcrusher.h Add Bitcrusher effect (thanks Pensive) il y a 9 ans
effect_chorus.cpp Optimize CPU Usage il y a 8 ans
effect_chorus.h remove unimplemented stop() il y a 10 ans
effect_delay.cpp Remove unused multiplier il y a 10 ans
effect_delay.h Add AudioEffectDelay il y a 10 ans
effect_delay_ext.cpp Add support for Frank's 6-chip Memoryboard4 (AUDIO_MEMORY_MEMORYBOARD) il y a 9 ans
effect_delay_ext.h Add support for Frank's 6-chip Memoryboard4 (AUDIO_MEMORY_MEMORYBOARD) il y a 9 ans
effect_envelope.cpp Add AudioEffectEnvelope il y a 10 ans
effect_envelope.h Add AudioEffectEnvelope il y a 10 ans
effect_fade.cpp Add MIT license il y a 10 ans
effect_fade.h Add MIT license il y a 10 ans
effect_flange.cpp Change Flange effect to one channel il y a 10 ans
effect_flange.h remove unimplemented stop() il y a 10 ans
effect_midside.cpp Don't compile M4 code on LC (but LC still not working) il y a 8 ans
effect_midside.h Add AudioEffectMidSide (thanks Hedde Bosman) il y a 8 ans
effect_multiply.cpp Fix more Teensy-LC compiler errors il y a 9 ans
effect_multiply.h Add AudioEffectMultiply il y a 10 ans
filter_biquad.cpp Fix more Teensy-LC compiler errors il y a 9 ans
filter_biquad.h Improve Biquad filter il y a 10 ans
filter_fir.cpp Impove and document FIR filter il y a 10 ans
filter_fir.h Document FIR filter requirements, fixes #114 il y a 8 ans
filter_fir.md Change FIR filter (as suggested by rheslip) to filter one channel instead of two. Updated example, added documenting file il y a 10 ans
filter_variable.cpp Fix more Teensy-LC compiler errors il y a 9 ans
filter_variable.h Finish AudioFilterStateVariable (signal control of corner frequency) il y a 10 ans
input_adc.cpp Fix some Teensy-LC compiler errors il y a 9 ans
input_adc.h Fix AudioInputAnalog il y a 10 ans
input_i2s.cpp Fix more Teensy-LC compiler errors il y a 9 ans
input_i2s.h Use DMAChannel begin() il y a 10 ans
input_i2s_quad.cpp More hardware defs il y a 8 ans
input_i2s_quad.h Begin work on quad channel audio input il y a 8 ans
keywords.txt Add CS4272 control (thanks William Hollender) il y a 8 ans
library.json Use tagged source code from repo il y a 8 ans
library.properties Increase to version 1.03 il y a 9 ans
memcpy_audio.S More hardware defs il y a 8 ans
memcpy_audio.h Add memcpy_tointerleaveQuad (thanks Frank) il y a 8 ans
mixer.cpp Fix some Teensy-LC compiler errors il y a 9 ans
mixer.h Allow negative/inverting mixer gain il y a 9 ans
multiplier.md Add a multiplier (by rheslip) il y a 10 ans
new_objects.md change format for new_objects files il y a 11 ans
output_dac.cpp More hardware defs il y a 8 ans
output_dac.h Initial work on DAC for Teensy-LC (still incomplete) il y a 9 ans
output_i2s.cpp Be more careful when configuring MCLK il y a 8 ans
output_i2s.h Use DMAChannel begin() il y a 10 ans
output_i2s_quad.cpp Be more careful when configuring MCLK il y a 8 ans
output_i2s_quad.h Begin work on quad channel audio input il y a 8 ans
output_pwm.cpp Fix more Teensy-LC compiler errors il y a 9 ans
output_pwm.h Make input ADC and output DAC play nicely together il y a 10 ans
output_spdif.cpp Be more careful when configuring MCLK il y a 8 ans
output_spdif.h Add keywords il y a 9 ans
play_memory.cpp Add status and position functions to AudioPlayMemory il y a 10 ans
play_memory.h Add status and position functions to AudioPlayMemory il y a 10 ans
play_queue.cpp do not forget - your own addition :-) il y a 10 ans
play_queue.h do not forget - your own addition :-) il y a 10 ans
play_sd_raw.cpp Do not disable all interrupts while opening RAW files il y a 9 ans
play_sd_raw.h Fix status functions in AudioPlaySdRaw il y a 10 ans
play_sd_wav.cpp Fix stereo WAV file startup & end (first and last 3 milliseconds) il y a 9 ans
play_sd_wav.h Fix audible click at end of Wav file playing il y a 10 ans
play_serialflash_raw.cpp remove leftover debug code from AudioPlaySerialflashRaw il y a 9 ans
play_serialflash_raw.h Add AudioPlaySerialflashRaw il y a 9 ans
record_queue.cpp Fix harmless compiler warnings in AudioRecordQueue il y a 10 ans
record_queue.h Finish AudioRecordQueue and Record example il y a 10 ans
spi_interrupt.cpp Add SPI interrupt registration layer il y a 10 ans
spi_interrupt.h register SPI interrupt when playing WAV & RAW files il y a 10 ans
synth_dc.cpp Add AudioSynthWaveformDc il y a 10 ans
synth_dc.h simplify overflow checks somewhat il y a 10 ans
synth_pinknoise.cpp Clean up harmless compiler warnings il y a 10 ans
synth_pinknoise.h Add AudioSynthNoisePink il y a 10 ans
synth_sine.cpp fix incorrect comment il y a 8 ans
synth_sine.h Add AudioSynthWaveformSineHires - High Precision Sine Wave il y a 8 ans
synth_tonesweep.cpp Bug fix so that downward tone sweeps will work. il y a 8 ans
synth_tonesweep.h Clean up harmless compiler warnings il y a 10 ans
synth_waveform.cpp #144: Add the reverse sawtooth and sample-and-hold waveforms. il y a 9 ans
synth_waveform.h #144: Add the reverse sawtooth and sample-and-hold waveforms. il y a 9 ans
synth_waveform.md Fixed AudioSynthWaveform. Uses LUT with linear interpolation for sinewave. il y a 10 ans
synth_whitenoise.cpp Fix more Teensy-LC compiler errors il y a 9 ans
synth_whitenoise.h Fix multiple white noise instances il y a 10 ans

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