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PaulStoffregen 0af537f2ca Add TODO for analyze peak optimization il y a 8 ans
examples Add AudioEffectMidSide documentation & example (thanks Hedde Bosman) il y a 9 ans
extras/wav2sketch Rename AudioAnalyzeGuitarTuner to AudioAnalyzeNoteFrequency il y a 9 ans
gui Opps, CSS class "tooltip" has baggage il y a 9 ans
utility rewrite AudioAnalyzeRMS - arm math version doesn't work! il y a 9 ans
.travis.yml Skip unused source files il y a 9 ans
Audio.h Add AudioEffectMidSide documentation & example (thanks Hedde Bosman) il y a 9 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 9 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 9 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_sgtl5000.cpp Add SGTL5000 dacVolumeRamp functions & example il y a 9 ans
control_sgtl5000.h Add SGTL5000 dacVolumeRamp functions & example il y a 9 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 Remove debug Serial.print... 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 9 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 Impove and document FIR filter il y a 10 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
keywords.txt Add AudioEffectMidSide (thanks Hedde Bosman) il y a 9 ans
library.json Handle all nested examples il y a 9 ans
library.properties Increase to version 1.03 il y a 9 ans
memcpy_audio.S Optimize I2S output memory copy (thanks Frank Bösing) il y a 8 ans
memcpy_audio.h Optimize I2S output memory copy (thanks Frank Bösing) 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 Initial work on DAC for Teensy-LC (still incomplete) il y a 9 ans
output_dac.h Initial work on DAC for Teensy-LC (still incomplete) il y a 9 ans
output_i2s.cpp Optimize I2S output memory copy (thanks Frank Bösing) il y a 8 ans
output_i2s.h Use DMAChannel begin() il y a 10 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 Fix more Teensy-LC compiler errors il y a 9 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 Oops, transmit the hires sine low bits properly il y a 9 ans
synth_sine.h Add AudioSynthWaveformSineHires - High Precision Sine Wave il y a 9 ans
synth_tonesweep.cpp Fix up synth_tonesweep and the example to conform (more closely) to the naming conventions il y a 10 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