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Frank 7a7d087b01 rmv comment 8 år sedan
examples Document FIR filter requirements, fixes #114 8 år sedan
extras Len noticed a bug in binary velocity output 8 år sedan
gui Update maximum delay recommendations 8 år sedan
utility rmv volatile from q-bit functions, 1 cycle less for clr 8 år sedan
.travis.yml Update Travis CI settings 8 år sedan
Audio.h Add CS4272 control (thanks William Hollender) 8 år sedan
AudioControl.h Add AudioSynthWaveformSine 10 år sedan
README.md remove Travis CI status from readme (it's too unreliable) 8 år sedan
analyze_fft256.cpp Initial work on FFT256 for Teensy-LC (untested) 9 år sedan
analyze_fft256.h Fix FFT read range (now inclusive) 9 år sedan
analyze_fft1024.cpp Fix some Teensy-LC compiler errors 9 år sedan
analyze_fft1024.h Fix FFT read range (now inclusive) 9 år sedan
analyze_notefreq.cpp Rename AudioAnalyzeGuitarTuner to AudioAnalyzeNoteFrequency 8 år sedan
analyze_notefreq.h Rename AudioAnalyzeGuitarTuner to AudioAnalyzeNoteFrequency 8 år sedan
analyze_peak.cpp Add TODO for analyze peak optimization 8 år sedan
analyze_peak.h Add readPeakToPeak() to AudioAnalyzePeak 8 år sedan
analyze_print.cpp Change AudioAnalyzePrint name API 10 år sedan
analyze_print.h Change AudioAnalyzePrint name API 10 år sedan
analyze_rms.cpp Don't compile M4 code on LC (but LC still not working) 8 år sedan
analyze_rms.h rewrite AudioAnalyzeRMS - arm math version doesn't work! 8 år sedan
analyze_tonedetect.cpp Fix more Teensy-LC compiler errors 9 år sedan
analyze_tonedetect.h Add MIT license 10 år sedan
control_ak4558.cpp Fixed control functions, examples, GUI elements 8 år sedan
control_ak4558.h Fixed control functions, examples, GUI elements 8 år sedan
control_cs4272.cpp Add CS4272 control (thanks William Hollender) 8 år sedan
control_cs4272.h Add CS4272 control (thanks William Hollender) 8 år sedan
control_sgtl5000.cpp Add ability to control two SGTL5000 chips 8 år sedan
control_sgtl5000.h Add ability to control two SGTL5000 chips 8 år sedan
control_wm8731.cpp AudioControlWM8731::inputLevel(float n) 9 år sedan
control_wm8731.h AudioControlWM8731::inputLevel(float n) 9 år sedan
data_ulaw.c Add missing open source license headers 10 år sedan
data_waveforms.c Remove old AudioSynthWaveform 10 år sedan
data_windows.c Add other window types for 1024 point FFT 10 år sedan
effect_bitcrusher.cpp Fix compiler warning 9 år sedan
effect_bitcrusher.h Add Bitcrusher effect (thanks Pensive) 9 år sedan
effect_chorus.cpp Remove debug Serial.print... 8 år sedan
effect_chorus.h remove unimplemented stop() 10 år sedan
effect_delay.cpp Remove unused multiplier 10 år sedan
effect_delay.h Add AudioEffectDelay 10 år sedan
effect_delay_ext.cpp Add support for Frank's 6-chip Memoryboard4 (AUDIO_MEMORY_MEMORYBOARD) 9 år sedan
effect_delay_ext.h Add support for Frank's 6-chip Memoryboard4 (AUDIO_MEMORY_MEMORYBOARD) 9 år sedan
effect_envelope.cpp Add AudioEffectEnvelope 10 år sedan
effect_envelope.h Add AudioEffectEnvelope 10 år sedan
effect_fade.cpp Add MIT license 10 år sedan
effect_fade.h Add MIT license 10 år sedan
effect_flange.cpp Change Flange effect to one channel 10 år sedan
effect_flange.h remove unimplemented stop() 10 år sedan
effect_midside.cpp Don't compile M4 code on LC (but LC still not working) 8 år sedan
effect_midside.h Add AudioEffectMidSide (thanks Hedde Bosman) 8 år sedan
effect_multiply.cpp Fix more Teensy-LC compiler errors 9 år sedan
effect_multiply.h Add AudioEffectMultiply 10 år sedan
filter_biquad.cpp Fix more Teensy-LC compiler errors 9 år sedan
filter_biquad.h Improve Biquad filter 10 år sedan
filter_fir.cpp Impove and document FIR filter 10 år sedan
filter_fir.h Document FIR filter requirements, fixes #114 8 år sedan
filter_fir.md Change FIR filter (as suggested by rheslip) to filter one channel instead of two. Updated example, added documenting file 10 år sedan
filter_variable.cpp Fix more Teensy-LC compiler errors 9 år sedan
filter_variable.h Finish AudioFilterStateVariable (signal control of corner frequency) 10 år sedan
input_adc.cpp Fix some Teensy-LC compiler errors 9 år sedan
input_adc.h Fix AudioInputAnalog 10 år sedan
input_i2s.cpp Fix more Teensy-LC compiler errors 9 år sedan
input_i2s.h Use DMAChannel begin() 10 år sedan
input_i2s_quad.cpp More hardware defs 8 år sedan
input_i2s_quad.h Begin work on quad channel audio input 8 år sedan
keywords.txt Add CS4272 control (thanks William Hollender) 8 år sedan
library.json Use tagged source code from repo 8 år sedan
library.properties Increase to version 1.03 9 år sedan
memcpy_audio.S More hardware defs 8 år sedan
memcpy_audio.h Add memcpy_tointerleaveQuad (thanks Frank) 8 år sedan
mixer.cpp Fix some Teensy-LC compiler errors 9 år sedan
mixer.h Allow negative/inverting mixer gain 8 år sedan
multiplier.md Add a multiplier (by rheslip) 10 år sedan
new_objects.md change format for new_objects files 10 år sedan
output_dac.cpp More hardware defs 8 år sedan
output_dac.h Initial work on DAC for Teensy-LC (still incomplete) 9 år sedan
output_i2s.cpp Be more careful when configuring MCLK 8 år sedan
output_i2s.h Use DMAChannel begin() 10 år sedan
output_i2s_quad.cpp Be more careful when configuring MCLK 8 år sedan
output_i2s_quad.h Begin work on quad channel audio input 8 år sedan
output_pwm.cpp Fix more Teensy-LC compiler errors 9 år sedan
output_pwm.h Make input ADC and output DAC play nicely together 10 år sedan
output_spdif.cpp Be more careful when configuring MCLK 8 år sedan
output_spdif.h Add keywords 9 år sedan
play_memory.cpp Add status and position functions to AudioPlayMemory 10 år sedan
play_memory.h Add status and position functions to AudioPlayMemory 10 år sedan
play_queue.cpp do not forget - your own addition :-) 10 år sedan
play_queue.h do not forget - your own addition :-) 10 år sedan
play_sd_raw.cpp Do not disable all interrupts while opening RAW files 9 år sedan
play_sd_raw.h Fix status functions in AudioPlaySdRaw 10 år sedan
play_sd_wav.cpp Fix stereo WAV file startup & end (first and last 3 milliseconds) 9 år sedan
play_sd_wav.h Fix audible click at end of Wav file playing 10 år sedan
play_serialflash_raw.cpp remove leftover debug code from AudioPlaySerialflashRaw 9 år sedan
play_serialflash_raw.h Add AudioPlaySerialflashRaw 9 år sedan
record_queue.cpp Fix harmless compiler warnings in AudioRecordQueue 10 år sedan
record_queue.h Finish AudioRecordQueue and Record example 10 år sedan
spi_interrupt.cpp Add SPI interrupt registration layer 10 år sedan
spi_interrupt.h register SPI interrupt when playing WAV & RAW files 10 år sedan
synth_dc.cpp Add AudioSynthWaveformDc 10 år sedan
synth_dc.h rmv comment 8 år sedan
synth_pinknoise.cpp Clean up harmless compiler warnings 10 år sedan
synth_pinknoise.h Add AudioSynthNoisePink 10 år sedan
synth_sine.cpp fix incorrect comment 8 år sedan
synth_sine.h Add AudioSynthWaveformSineHires - High Precision Sine Wave 8 år sedan
synth_tonesweep.cpp Bug fix so that downward tone sweeps will work. 8 år sedan
synth_tonesweep.h Clean up harmless compiler warnings 10 år sedan
synth_waveform.cpp #144: Add the reverse sawtooth and sample-and-hold waveforms. 8 år sedan
synth_waveform.h #144: Add the reverse sawtooth and sample-and-hold waveforms. 8 år sedan
synth_waveform.md Fixed AudioSynthWaveform. Uses LUT with linear interpolation for sinewave. 10 år sedan
synth_whitenoise.cpp Fix more Teensy-LC compiler errors 9 år sedan
synth_whitenoise.h Fix multiple white noise instances 10 år sedan

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