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PaulStoffregen 88535e1164 ToneSweep improvements (thanks Pio) 7 lat temu
examples Add ADAT 8 channel TOSLINK output by Ernstjan Freriks 7 lat temu
extras Fix format error: header chunkSize can be 16, 18, or 40 7 lat temu
gui ToneSweep improvements (thanks Pio) 7 lat temu
utility Replace DC removal algorithm with IIR HPF, 2 Hz 7 lat temu
.gitignore Add documentation for new objects 8 lat temu
.travis.yml Update Travis CI settings 8 lat temu
Audio.h Add ADAT 8 channel TOSLINK output by Ernstjan Freriks 7 lat temu
AudioControl.h Add AudioSynthWaveformSine 10 lat temu
README.md Update readme 7 lat temu
analyze_fft256.cpp Initial work on FFT256 for Teensy-LC (untested) 9 lat temu
analyze_fft256.h Fix problem with optimized loops like do {} while (!myFFT.available()); 7 lat temu
analyze_fft1024.cpp Fix some Teensy-LC compiler errors 9 lat temu
analyze_fft1024.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
analyze_notefreq.cpp Remove leftover debug code 8 lat temu
analyze_notefreq.h NoteFrequency fixes 8 lat temu
analyze_peak.cpp Add TODO for analyze peak optimization 8 lat temu
analyze_peak.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
analyze_print.cpp Change AudioAnalyzePrint name API 10 lat temu
analyze_print.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
analyze_rms.cpp AudioAnalyzeRMS needs to treat no input as zeros 7 lat temu
analyze_rms.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
analyze_tonedetect.cpp Fix more Teensy-LC compiler errors 9 lat temu
analyze_tonedetect.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
control_ak4558.cpp Fixed control functions, examples, GUI elements 9 lat temu
control_ak4558.h Fixed control functions, examples, GUI elements 9 lat temu
control_cs4272.cpp Add CS4272 control (thanks William Hollender) 8 lat temu
control_cs4272.h Add CS4272 control (thanks William Hollender) 8 lat temu
control_cs42448.cpp Add AudioControlCS42448 7 lat temu
control_cs42448.h Add AudioControlCS42448 7 lat temu
control_sgtl5000.cpp Add ability to control two SGTL5000 chips 8 lat temu
control_sgtl5000.h Add ability to control two SGTL5000 chips 8 lat temu
control_wm8731.cpp AudioControlWM8731::inputLevel(float n) 9 lat temu
control_wm8731.h AudioControlWM8731::inputLevel(float n) 9 lat temu
data_ulaw.c Add missing open source license headers 10 lat temu
data_waveforms.c Remove old AudioSynthWaveform 10 lat temu
data_windows.c Add other window types for 1024 point FFT 10 lat temu
effect_bitcrusher.cpp Fix compiler warning 9 lat temu
effect_bitcrusher.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
effect_chorus.cpp Merge pull request #166 from FrankBoesing/patch-2 8 lat temu
effect_chorus.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
effect_delay.cpp Fix delay effect on Teensy 3.5 & 3.6 7 lat temu
effect_delay.h Fix delay effect on Teensy 3.5 & 3.6 7 lat temu
effect_delay_ext.cpp Add F-RAM 7 lat temu
effect_delay_ext.h Add F-RAM 7 lat temu
effect_envelope.cpp Add AudioEffectEnvelope releaseNoteOn 7 lat temu
effect_envelope.h Add AudioEffectEnvelope releaseNoteOn 7 lat temu
effect_fade.cpp Fix minor compiler warning 8 lat temu
effect_fade.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
effect_flange.cpp Calculation of delay_rate_incr 8 lat temu
effect_flange.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
effect_midside.cpp Don't compile M4 code on LC (but LC still not working) 8 lat temu
effect_midside.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
effect_multiply.cpp Fix more Teensy-LC compiler errors 9 lat temu
effect_multiply.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
effect_reverb.cpp Add reverb effect, from Joao Rossi Filho 8 lat temu
effect_reverb.h Add reverb effect, from Joao Rossi Filho 8 lat temu
effect_waveshaper.cpp Accept floats instead of int16_ts for waveshape in shape() 7 lat temu
effect_waveshaper.h Accept floats instead of int16_ts for waveshape in shape() 7 lat temu
filter_biquad.cpp Don't cause a loud pop when changing biquad filter coefficients 8 lat temu
filter_biquad.h Add shelving filter support for biquad 8 lat temu
filter_fir.cpp Impove and document FIR filter 10 lat temu
filter_fir.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
filter_fir.md Change FIR filter (as suggested by rheslip) to filter one channel instead of two. Updated example, added documenting file 10 lat temu
filter_variable.cpp Fix more Teensy-LC compiler errors 9 lat temu
filter_variable.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
input_adc.cpp Further precision increase eliminates DC offset 7 lat temu
input_adc.h Fix indentation and move filtercoefficient to #define constant instead of int32_t variable 7 lat temu
input_adcs.cpp Further precision increase eliminates DC offset 7 lat temu
input_adcs.h Fix indentation and move filtercoefficient to #define constant instead of int32_t variable 7 lat temu
input_i2s.cpp Use 64 bit frame size for I2S master mode 7 lat temu
input_i2s.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
input_i2s_quad.cpp Quad input on Teensy 3.5 & 3.6 needs pin 38 7 lat temu
input_i2s_quad.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
input_tdm.cpp Add AudioInputTDM 7 lat temu
input_tdm.h Add AudioInputTDM 7 lat temu
keywords.txt Add ADAT 8 channel TOSLINK output by Ernstjan Freriks 7 lat temu
library.json Let PlatformIO automatically detect Arduino v1.0 library format 8 lat temu
library.properties Edit version string, for Arduino 1.6.11 compatibility 8 lat temu
memcpy_audio.S Allow blocksizes 8 and 16 8 lat temu
memcpy_audio.h Add memcpy_tointerleaveQuad (thanks Frank) 8 lat temu
mixer.cpp Fix some Teensy-LC compiler errors 9 lat temu
mixer.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
multiplier.md Add a multiplier (by rheslip) 10 lat temu
new_objects.md change format for new_objects files 11 lat temu
output_adat.cpp Add ADAT 8 channel TOSLINK output by Ernstjan Freriks 7 lat temu
output_adat.h Add ADAT 8 channel TOSLINK output by Ernstjan Freriks 7 lat temu
output_dac.cpp Fix DAC output range 7 lat temu
output_dac.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
output_dacs.cpp Fix buffer management in stereo DAC output 7 lat temu
output_dacs.h Add AudioOutputAnalogStereo 8 lat temu
output_i2s.cpp Use 64 bit frame size for I2S master mode 7 lat temu
output_i2s.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
output_i2s_quad.cpp Fix simultaneous quad input & output on Teensy 3.6 with CPU > 120 MHz 7 lat temu
output_i2s_quad.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
output_pt8211.cpp Add a comment for TDA1543 7 lat temu
output_pt8211.h changed defines to be more specific 8 lat temu
output_pwm.cpp Fix BUG for AUDIO_BLOCK_SAMPLES != 128 8 lat temu
output_pwm.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
output_spdif.cpp Support more clock speeds 8 lat temu
output_spdif.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
output_tdm.cpp Add AudioInputTDM 7 lat temu
output_tdm.h Add AudioInputTDM 7 lat temu
play_memory.cpp Fix hard-coded 128 block size limits 8 lat temu
play_memory.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
play_queue.cpp do not forget - your own addition :-) 10 lat temu
play_queue.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
play_sd_raw.cpp Fix for two little bugs 8 lat temu
play_sd_raw.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
play_sd_wav.cpp Fix AudioPlaySdWav status functions with LTO 7 lat temu
play_sd_wav.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
play_serialflash_raw.cpp remove leftover debug code from AudioPlaySerialflashRaw 9 lat temu
play_serialflash_raw.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
record_queue.cpp Fix harmless compiler warnings in AudioRecordQueue 10 lat temu
record_queue.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
spi_interrupt.cpp Add SPI interrupt registration layer 10 lat temu
spi_interrupt.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
synth_dc.cpp Fix hard-coded 128 block size limits 8 lat temu
synth_dc.h Add AudioSynthWaveformDc read() 7 lat temu
synth_karplusstrong.cpp Decay resonance (loop gain) slightly in Karplus Strong 8 lat temu
synth_karplusstrong.h Add Synthesis Guitar example 8 lat temu
synth_pinknoise.cpp Clean up harmless compiler warnings 10 lat temu
synth_pinknoise.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
synth_pwm.cpp Minor optimization in AudioSynthWaveformPWM 7 lat temu
synth_pwm.h Add AudioSynthWaveformPWM 7 lat temu
synth_simple_drum.cpp Adding SimpleDrum synthesis object to audio library. 8 lat temu
synth_simple_drum.h Adding SimpleDrum synthesis object to audio library. 8 lat temu
synth_sine.cpp fix incorrect comment 8 lat temu
synth_sine.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
synth_tonesweep.cpp ToneSweep improvements (thanks Pio) 7 lat temu
synth_tonesweep.h ToneSweep improvements (thanks Pio) 7 lat temu
synth_waveform.cpp #144: Add the reverse sawtooth and sample-and-hold waveforms. 9 lat temu
synth_waveform.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
synth_waveform.md Fixed AudioSynthWaveform. Uses LUT with linear interpolation for sinewave. 10 lat temu
synth_whitenoise.cpp Fix more Teensy-LC compiler errors 9 lat temu
synth_whitenoise.h Do not assume AudioStream.h includes Arduino.h 8 lat temu

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/index.html

Supported Hardware

Audio Adaptor Board for 16 bit stereo input and output.

Inputs Outputs

Dual Audio Adaptor Boards for quad channel 16 bit input and output.

Teensy 3.6, Teensy 3.5, Teensy 3.2, or Teensy 3.1 12 bit DAC Output (Mono)

DAC Output

Teensy 3.6, Teensy 3.5, Teensy 3.2, Teensy 3.1 or Teensy 3.0 ADC Input (Mono)

ADC Input

Teensy 3.6, Teensy 3.5, or Teensy 3.2 ADC Input (Stereo)

ADC Input

Teensy 3.6 or Teensy 3.5 12 bit DAC Output (Stereo)

DAC Output

Teensy 3.6, Teensy 3.5, Teensy 3.2, Teensy 3.1 or Teensy 3.0 PWM Output (Mono)

PWM Output

USB Audio: Bi-Directional Stereo Streaming to a PC

Inputs Outputs