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PaulStoffregen b8cab1745d Add SPI external memory timing comment 8 лет назад
examples Document FIR filter requirements, fixes #114 8 лет назад
extras Len noticed a bug in binary velocity output 8 лет назад
gui Update maximum delay recommendations 8 лет назад
utility Typo 8 лет назад
.travis.yml Update Travis CI settings 8 лет назад
Audio.h Add CS4272 control (thanks William Hollender) 8 лет назад
AudioControl.h Add AudioSynthWaveformSine 10 лет назад
README.md remove Travis CI status from readme (it's too unreliable) 8 лет назад
analyze_fft256.cpp Initial work on FFT256 for Teensy-LC (untested) 9 лет назад
analyze_fft256.h Fix FFT read range (now inclusive) 9 лет назад
analyze_fft1024.cpp Fix some Teensy-LC compiler errors 9 лет назад
analyze_fft1024.h Fix FFT read range (now inclusive) 9 лет назад
analyze_notefreq.cpp Rename AudioAnalyzeGuitarTuner to AudioAnalyzeNoteFrequency 9 лет назад
analyze_notefreq.h Rename AudioAnalyzeGuitarTuner to AudioAnalyzeNoteFrequency 9 лет назад
analyze_peak.cpp Add TODO for analyze peak optimization 8 лет назад
analyze_peak.h Add readPeakToPeak() to AudioAnalyzePeak 9 лет назад
analyze_print.cpp Change AudioAnalyzePrint name API 10 лет назад
analyze_print.h Change AudioAnalyzePrint name API 10 лет назад
analyze_rms.cpp Don't compile M4 code on LC (but LC still not working) 8 лет назад
analyze_rms.h rewrite AudioAnalyzeRMS - arm math version doesn't work! 9 лет назад
analyze_tonedetect.cpp Fix more Teensy-LC compiler errors 9 лет назад
analyze_tonedetect.h Add MIT license 10 лет назад
control_ak4558.cpp Fixed control functions, examples, GUI elements 9 лет назад
control_ak4558.h Fixed control functions, examples, GUI elements 9 лет назад
control_cs4272.cpp Add CS4272 control (thanks William Hollender) 8 лет назад
control_cs4272.h Add CS4272 control (thanks William Hollender) 8 лет назад
control_sgtl5000.cpp Add ability to control two SGTL5000 chips 8 лет назад
control_sgtl5000.h Add ability to control two SGTL5000 chips 8 лет назад
control_wm8731.cpp AudioControlWM8731::inputLevel(float n) 9 лет назад
control_wm8731.h AudioControlWM8731::inputLevel(float n) 9 лет назад
data_ulaw.c Add missing open source license headers 10 лет назад
data_waveforms.c Remove old AudioSynthWaveform 10 лет назад
data_windows.c Add other window types for 1024 point FFT 10 лет назад
effect_bitcrusher.cpp Fix compiler warning 9 лет назад
effect_bitcrusher.h Add Bitcrusher effect (thanks Pensive) 9 лет назад
effect_chorus.cpp Merge pull request #166 from FrankBoesing/patch-2 8 лет назад
effect_chorus.h remove unimplemented stop() 10 лет назад
effect_delay.cpp Remove unused multiplier 10 лет назад
effect_delay.h Add AudioEffectDelay 10 лет назад
effect_delay_ext.cpp Add SPI external memory timing comment 8 лет назад
effect_delay_ext.h Add support for Frank's 6-chip Memoryboard4 (AUDIO_MEMORY_MEMORYBOARD) 9 лет назад
effect_envelope.cpp Add AudioEffectEnvelope 10 лет назад
effect_envelope.h Add AudioEffectEnvelope 10 лет назад
effect_fade.cpp Add MIT license 10 лет назад
effect_fade.h Add MIT license 10 лет назад
effect_flange.cpp use AUDIO_SAMPLE_RATE_EXACT 8 лет назад
effect_flange.h remove unimplemented stop() 10 лет назад
effect_midside.cpp Don't compile M4 code on LC (but LC still not working) 8 лет назад
effect_midside.h Add AudioEffectMidSide (thanks Hedde Bosman) 9 лет назад
effect_multiply.cpp Fix more Teensy-LC compiler errors 9 лет назад
effect_multiply.h Add AudioEffectMultiply 10 лет назад
filter_biquad.cpp Fix more Teensy-LC compiler errors 9 лет назад
filter_biquad.h Improve Biquad filter 10 лет назад
filter_fir.cpp Impove and document FIR filter 10 лет назад
filter_fir.h Document FIR filter requirements, fixes #114 8 лет назад
filter_fir.md Change FIR filter (as suggested by rheslip) to filter one channel instead of two. Updated example, added documenting file 10 лет назад
filter_variable.cpp Fix more Teensy-LC compiler errors 9 лет назад
filter_variable.h Finish AudioFilterStateVariable (signal control of corner frequency) 10 лет назад
input_adc.cpp Fix some Teensy-LC compiler errors 9 лет назад
input_adc.h Fix AudioInputAnalog 10 лет назад
input_i2s.cpp Fix more Teensy-LC compiler errors 9 лет назад
input_i2s.h Use DMAChannel begin() 10 лет назад
input_i2s_quad.cpp More hardware defs 8 лет назад
input_i2s_quad.h Begin work on quad channel audio input 8 лет назад
keywords.txt Add CS4272 control (thanks William Hollender) 8 лет назад
library.json Use tagged source code from repo 8 лет назад
library.properties Increase to version 1.03 9 лет назад
memcpy_audio.S More hardware defs 8 лет назад
memcpy_audio.h Add memcpy_tointerleaveQuad (thanks Frank) 8 лет назад
mixer.cpp Fix some Teensy-LC compiler errors 9 лет назад
mixer.h Allow negative/inverting mixer gain 9 лет назад
multiplier.md Add a multiplier (by rheslip) 10 лет назад
new_objects.md change format for new_objects files 11 лет назад
output_dac.cpp More hardware defs 8 лет назад
output_dac.h Initial work on DAC for Teensy-LC (still incomplete) 9 лет назад
output_i2s.cpp Be more careful when configuring MCLK 8 лет назад
output_i2s.h Use DMAChannel begin() 10 лет назад
output_i2s_quad.cpp Be more careful when configuring MCLK 8 лет назад
output_i2s_quad.h Begin work on quad channel audio input 8 лет назад
output_pwm.cpp Fix more Teensy-LC compiler errors 9 лет назад
output_pwm.h Make input ADC and output DAC play nicely together 10 лет назад
output_spdif.cpp Be more careful when configuring MCLK 8 лет назад
output_spdif.h Add keywords 9 лет назад
play_memory.cpp Add status and position functions to AudioPlayMemory 10 лет назад
play_memory.h Add status and position functions to AudioPlayMemory 10 лет назад
play_queue.cpp do not forget - your own addition :-) 10 лет назад
play_queue.h do not forget - your own addition :-) 10 лет назад
play_sd_raw.cpp Do not disable all interrupts while opening RAW files 9 лет назад
play_sd_raw.h Fix status functions in AudioPlaySdRaw 10 лет назад
play_sd_wav.cpp Fix stereo WAV file startup & end (first and last 3 milliseconds) 9 лет назад
play_sd_wav.h Fix audible click at end of Wav file playing 10 лет назад
play_serialflash_raw.cpp remove leftover debug code from AudioPlaySerialflashRaw 9 лет назад
play_serialflash_raw.h Add AudioPlaySerialflashRaw 9 лет назад
record_queue.cpp Fix harmless compiler warnings in AudioRecordQueue 10 лет назад
record_queue.h Finish AudioRecordQueue and Record example 10 лет назад
spi_interrupt.cpp Add SPI interrupt registration layer 10 лет назад
spi_interrupt.h register SPI interrupt when playing WAV & RAW files 10 лет назад
synth_dc.cpp Add AudioSynthWaveformDc 10 лет назад
synth_dc.h grrrr 8 лет назад
synth_pinknoise.cpp Clean up harmless compiler warnings 10 лет назад
synth_pinknoise.h Add AudioSynthNoisePink 10 лет назад
synth_sine.cpp fix incorrect comment 8 лет назад
synth_sine.h Add AudioSynthWaveformSineHires - High Precision Sine Wave 9 лет назад
synth_tonesweep.cpp fix tonesweep 8 лет назад
synth_tonesweep.h Clean up harmless compiler warnings 10 лет назад
synth_waveform.cpp #144: Add the reverse sawtooth and sample-and-hold waveforms. 9 лет назад
synth_waveform.h #144: Add the reverse sawtooth and sample-and-hold waveforms. 9 лет назад
synth_waveform.md Fixed AudioSynthWaveform. Uses LUT with linear interpolation for sinewave. 10 лет назад
synth_whitenoise.cpp Fix more Teensy-LC compiler errors 9 лет назад
synth_whitenoise.h Fix multiple white noise instances 10 лет назад

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