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PaulStoffregen a8aa77327d More hardware defs 8 年前
examples Add link to FFT log band scaling conversation & scripts 8 年前
extras Len noticed a bug in binary velocity output 8 年前
gui Fix AudioEffectFlange documentation 8 年前
utility rewrite AudioAnalyzeRMS - arm math version doesn't work! 9 年前
.travis.yml Update Travis CI settings 8 年前
Audio.h Add CS4272 control (thanks William Hollender) 8 年前
AudioControl.h Add AudioSynthWaveformSine 10 年前
README.md remove Travis CI status from readme (it's too unreliable) 8 年前
analyze_fft256.cpp Initial work on FFT256 for Teensy-LC (untested) 9 年前
analyze_fft256.h Fix FFT read range (now inclusive) 9 年前
analyze_fft1024.cpp Fix some Teensy-LC compiler errors 9 年前
analyze_fft1024.h Fix FFT read range (now inclusive) 9 年前
analyze_notefreq.cpp Rename AudioAnalyzeGuitarTuner to AudioAnalyzeNoteFrequency 9 年前
analyze_notefreq.h Rename AudioAnalyzeGuitarTuner to AudioAnalyzeNoteFrequency 9 年前
analyze_peak.cpp Add TODO for analyze peak optimization 8 年前
analyze_peak.h Add readPeakToPeak() to AudioAnalyzePeak 9 年前
analyze_print.cpp Change AudioAnalyzePrint name API 10 年前
analyze_print.h Change AudioAnalyzePrint name API 10 年前
analyze_rms.cpp Don't compile M4 code on LC (but LC still not working) 8 年前
analyze_rms.h rewrite AudioAnalyzeRMS - arm math version doesn't work! 9 年前
analyze_tonedetect.cpp Fix more Teensy-LC compiler errors 9 年前
analyze_tonedetect.h Add MIT license 10 年前
control_ak4558.cpp Fixed control functions, examples, GUI elements 9 年前
control_ak4558.h Fixed control functions, examples, GUI elements 9 年前
control_cs4272.cpp Add CS4272 control (thanks William Hollender) 8 年前
control_cs4272.h Add CS4272 control (thanks William Hollender) 8 年前
control_sgtl5000.cpp Add ability to control two SGTL5000 chips 8 年前
control_sgtl5000.h Add ability to control two SGTL5000 chips 8 年前
control_wm8731.cpp AudioControlWM8731::inputLevel(float n) 9 年前
control_wm8731.h AudioControlWM8731::inputLevel(float n) 9 年前
data_ulaw.c Add missing open source license headers 10 年前
data_waveforms.c Remove old AudioSynthWaveform 10 年前
data_windows.c Add other window types for 1024 point FFT 10 年前
effect_bitcrusher.cpp Fix compiler warning 9 年前
effect_bitcrusher.h Add Bitcrusher effect (thanks Pensive) 9 年前
effect_chorus.cpp Remove debug Serial.print... 8 年前
effect_chorus.h remove unimplemented stop() 10 年前
effect_delay.cpp Remove unused multiplier 10 年前
effect_delay.h Add AudioEffectDelay 10 年前
effect_delay_ext.cpp Add support for Frank's 6-chip Memoryboard4 (AUDIO_MEMORY_MEMORYBOARD) 9 年前
effect_delay_ext.h Add support for Frank's 6-chip Memoryboard4 (AUDIO_MEMORY_MEMORYBOARD) 9 年前
effect_envelope.cpp Add AudioEffectEnvelope 10 年前
effect_envelope.h Add AudioEffectEnvelope 10 年前
effect_fade.cpp Add MIT license 10 年前
effect_fade.h Add MIT license 10 年前
effect_flange.cpp Change Flange effect to one channel 10 年前
effect_flange.h remove unimplemented stop() 10 年前
effect_midside.cpp Don't compile M4 code on LC (but LC still not working) 8 年前
effect_midside.h Add AudioEffectMidSide (thanks Hedde Bosman) 9 年前
effect_multiply.cpp Fix more Teensy-LC compiler errors 9 年前
effect_multiply.h Add AudioEffectMultiply 10 年前
filter_biquad.cpp Fix more Teensy-LC compiler errors 9 年前
filter_biquad.h Improve Biquad filter 10 年前
filter_fir.cpp Impove and document FIR filter 10 年前
filter_fir.h Impove and document FIR filter 10 年前
filter_fir.md Change FIR filter (as suggested by rheslip) to filter one channel instead of two. Updated example, added documenting file 10 年前
filter_variable.cpp Fix more Teensy-LC compiler errors 9 年前
filter_variable.h Finish AudioFilterStateVariable (signal control of corner frequency) 10 年前
input_adc.cpp Fix some Teensy-LC compiler errors 9 年前
input_adc.h Fix AudioInputAnalog 10 年前
input_i2s.cpp Fix more Teensy-LC compiler errors 9 年前
input_i2s.h Use DMAChannel begin() 10 年前
input_i2s_quad.cpp More hardware defs 8 年前
input_i2s_quad.h Begin work on quad channel audio input 8 年前
keywords.txt Add CS4272 control (thanks William Hollender) 8 年前
library.json Handle all nested examples 9 年前
library.properties Increase to version 1.03 9 年前
memcpy_audio.S More hardware defs 8 年前
memcpy_audio.h Add memcpy_tointerleaveQuad (thanks Frank) 8 年前
mixer.cpp Fix some Teensy-LC compiler errors 9 年前
mixer.h Allow negative/inverting mixer gain 9 年前
multiplier.md Add a multiplier (by rheslip) 10 年前
new_objects.md change format for new_objects files 11 年前
output_dac.cpp More hardware defs 8 年前
output_dac.h Initial work on DAC for Teensy-LC (still incomplete) 9 年前
output_i2s.cpp More hardware defs 8 年前
output_i2s.h Use DMAChannel begin() 10 年前
output_i2s_quad.cpp More hardware defs 8 年前
output_i2s_quad.h Begin work on quad channel audio input 8 年前
output_pwm.cpp Fix more Teensy-LC compiler errors 9 年前
output_pwm.h Make input ADC and output DAC play nicely together 10 年前
output_spdif.cpp More hardware defs 8 年前
output_spdif.h Add keywords 9 年前
play_memory.cpp Add status and position functions to AudioPlayMemory 10 年前
play_memory.h Add status and position functions to AudioPlayMemory 10 年前
play_queue.cpp do not forget - your own addition :-) 10 年前
play_queue.h do not forget - your own addition :-) 10 年前
play_sd_raw.cpp Do not disable all interrupts while opening RAW files 9 年前
play_sd_raw.h Fix status functions in AudioPlaySdRaw 10 年前
play_sd_wav.cpp Fix stereo WAV file startup & end (first and last 3 milliseconds) 9 年前
play_sd_wav.h Fix audible click at end of Wav file playing 10 年前
play_serialflash_raw.cpp remove leftover debug code from AudioPlaySerialflashRaw 9 年前
play_serialflash_raw.h Add AudioPlaySerialflashRaw 9 年前
record_queue.cpp Fix harmless compiler warnings in AudioRecordQueue 10 年前
record_queue.h Finish AudioRecordQueue and Record example 10 年前
spi_interrupt.cpp Add SPI interrupt registration layer 10 年前
spi_interrupt.h register SPI interrupt when playing WAV & RAW files 10 年前
synth_dc.cpp Add AudioSynthWaveformDc 10 年前
synth_dc.h simplify overflow checks somewhat 10 年前
synth_pinknoise.cpp Clean up harmless compiler warnings 10 年前
synth_pinknoise.h Add AudioSynthNoisePink 10 年前
synth_sine.cpp fix incorrect comment 8 年前
synth_sine.h Add AudioSynthWaveformSineHires - High Precision Sine Wave 9 年前
synth_tonesweep.cpp Bug fix so that downward tone sweeps will work. 8 年前
synth_tonesweep.h Clean up harmless compiler warnings 10 年前
synth_waveform.cpp #144: Add the reverse sawtooth and sample-and-hold waveforms. 9 年前
synth_waveform.h #144: Add the reverse sawtooth and sample-and-hold waveforms. 9 年前
synth_waveform.md Fixed AudioSynthWaveform. Uses LUT with linear interpolation for sinewave. 10 年前
synth_whitenoise.cpp Fix more Teensy-LC compiler errors 9 年前
synth_whitenoise.h Fix multiple white noise instances 10 年前

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