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Frank 1602348981
Add PROGMEM to output array 		3 lat temu
docs Add issue template 6 lat temu
examples Merge pull request #365 from standarddeviant/sdwav-pausable 3 lat temu
extras Add PROGMEM to output array 3 lat temu
gui Merge pull request #378 from FrankBoesing/fix-doc 3 lat temu
utility Fixes for Teensy LC 3 lat temu
.gitignore Add documentation for new objects 8 lat temu
.travis.yml Update Travis CI settings 8 lat temu
Audio.h Add rectifier effect 4 lat temu
AudioControl.h Add AudioSynthWaveformSine 10 lat temu
Quantizer.cpp prevent clipping 4 lat temu
Quantizer.h async spdif input added 4 lat temu
README.md Mention Teensy 4.x in readme 3 lat temu
Resampler.cpp added the maximum filter length to the parameters 4 lat temu
Resampler.h added the maximum filter length to the parameters 4 lat temu
analyze_fft256.cpp Fixes for Teensy LC 3 lat temu
analyze_fft256.h Fix problem with optimized loops like do {} while (!myFFT.available()); 7 lat temu
analyze_fft1024.cpp Import all of Frank's T4 edits 5 lat temu
analyze_fft1024.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
analyze_notefreq.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
analyze_notefreq.h NoteFrequency fixes 8 lat temu
analyze_peak.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
analyze_peak.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
analyze_print.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
analyze_print.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
analyze_rms.cpp Import all of Frank's T4 edits 5 lat temu
analyze_rms.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
analyze_tonedetect.cpp Import all of Frank's T4 edits 5 lat temu
analyze_tonedetect.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
async_input_spdif3.cpp FLASHMEM instead of PROGMEM for functions 4 lat temu
async_input_spdif3.h prevent clipping 4 lat temu
biquad.h async spdif input added 4 lat temu
control_ak4558.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
control_ak4558.h Fixed control functions, examples, GUI elements 9 lat temu
control_cs4272.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
control_cs4272.h Add CS4272 control (thanks William Hollender) 9 lat temu
control_cs42448.cpp Add comment about strange CS42448 issue and undocumented bit 5 lat temu
control_cs42448.h Add AudioControlCS42448 7 lat temu
control_sgtl5000.cpp Merge pull request #373 from grahamwhaley/20201229_5k_hishelf 3 lat temu
control_sgtl5000.h Merge pull request #334 from jurgenbelien/master 3 lat temu
control_tlv320aic3206.cpp AIC3206: rename channel macros, add comments 6 lat temu
control_tlv320aic3206.h AIC3206: rename channel macros, add comments 6 lat temu
control_wm8731.cpp WM8731 has flaky I2C communication workaround 5 lat temu
control_wm8731.h Add WM8731 inputSelect() function and update example 6 lat temu
data_bandlimit_step.c Band limited versions of square and sawtooth added to AudioSynthWaveform and AudioSynthWaveformModulated 4 lat temu
data_spdif.c use common spdif bcmlookup table 5 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 Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
effect_bitcrusher.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
effect_chorus.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
effect_chorus.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
effect_combine.cpp Add AudioEffectDigitalCombine (from Bleep Labs) 6 lat temu
effect_combine.h Move combine effect constants to class enum, not global scope 6 lat temu
effect_delay.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
effect_delay.h Allow longer max delay effect on Teensy 4.0 5 lat temu
effect_delay_ext.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
effect_delay_ext.h Add F-RAM 7 lat temu
effect_envelope.cpp Add isActive() and isSustain() to envelope 6 lat temu
effect_envelope.h Add isActive() and isSustain() to envelope 6 lat temu
effect_fade.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
effect_fade.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
effect_flange.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
effect_flange.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
effect_freeverb.cpp Round down to 0 to avoid the buzzing noise issue reported here: 4 lat temu
effect_freeverb.h Add AudioEffectFreeverbStereo 6 lat temu
effect_granular.cpp Increase granular speed range, change public function to setSpeed() 6 lat temu
effect_granular.h Increase granular speed range, change public function to setSpeed() 6 lat temu
effect_midside.cpp Import all of Frank's T4 edits 5 lat temu
effect_midside.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
effect_multiply.cpp Import all of Frank's T4 edits 5 lat temu
effect_multiply.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
effect_rectifier.cpp Update effect_rectifier.cpp 4 lat temu
effect_rectifier.h update keywords 4 lat temu
effect_reverb.cpp memset: wrong size - element size is not 1 6 lat temu
effect_reverb.h Add reverb effect, from Joao Rossi Filho 8 lat temu
effect_waveshaper.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
effect_waveshaper.h Accept floats instead of int16_ts for waveshape in shape() 7 lat temu
filter_biquad.cpp Add comment about noise shaping in biquad filter 5 lat temu
filter_biquad.h Add shelving filter support for biquad 8 lat temu
filter_fir.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 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 Update links in comments, to Laurent de Soras's exp2 approximation info 5 lat temu
filter_variable.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
input_adc.cpp Fix ADC input on Teensy 3.x 4 lat temu
input_adc.h Initial support for ADC input on Teensy 4.0 4 lat temu
input_adcs.cpp align 4 lat temu
input_adcs.h Fix indentation and move filtercoefficient to #define constant instead of int32_t variable 7 lat temu
input_i2s.cpp Add I2sInput Master 3 lat temu
input_i2s.h LC input slave 3 lat temu
input_i2s2.cpp Update input_i2s2.cpp 4 lat temu
input_i2s2.h various (see below) 5 lat temu
input_i2s_hex.cpp add DMAMEM, fix warnings 4 lat temu
input_i2s_hex.h 6 channel I2S input for Teensy 4.0 4 lat temu
input_i2s_oct.cpp 8 channel I2S input for Teensy 4.0 4 lat temu
input_i2s_oct.h 8 channel I2S input for Teensy 4.0 4 lat temu
input_i2s_quad.cpp add DMAMEM, fix warnings 4 lat temu
input_i2s_quad.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
input_pdm.cpp Kinetis K only 3 lat temu
input_pdm.h Add AudioInputPDM 6 lat temu
input_spdif3.cpp spdif-input 4 lat temu
input_spdif3.h spdif-input 4 lat temu
input_tdm.cpp Fix TDM input on Teensy 4.0 5 lat temu
input_tdm.h Add AudioInputTDM 7 lat temu
input_tdm2.cpp Fix TDM2 on Teensy 4.0 5 lat temu
input_tdm2.h T4: Input TDM, Input TDM2 5 lat temu
keywords.txt Add bandlimited pulse support 4 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 Import all of Frank's T4 edits 5 lat temu
memcpy_audio.h Add memcpy_tointerleaveQuad (thanks Frank) 9 lat temu
mixer.cpp Import all of Frank's T4 edits 5 lat temu
mixer.h Import all of Frank's T4 edits 5 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 Update output_adat.cpp 4 lat temu
output_adat.h Add ADAT 8 channel TOSLINK output by Ernstjan Freriks 7 lat temu
output_dac.cpp Remove leftover debug printing 4 lat temu
output_dac.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
output_dacs.cpp alignment 4 lat temu
output_dacs.h Add AudioOutputAnalogStereo 8 lat temu
output_i2s.cpp LC input slave 3 lat temu
output_i2s.h Teensy LC AudioOutputI2S(+slave) 3 lat temu
output_i2s2.cpp Fix simultaneous input & output on I2S2 5 lat temu
output_i2s2.h various (see below) 5 lat temu
output_i2s_hex.cpp 6 channel I2S output for Teensy 4.0 4 lat temu
output_i2s_hex.h 6 channel I2S output for Teensy 4.0 4 lat temu
output_i2s_oct.cpp 8 channel I2S output for Teensy 4.0 4 lat temu
output_i2s_oct.h 8 channel I2S output for Teensy 4.0 4 lat temu
output_i2s_quad.cpp Add comment with link to forum conversation 4 lat temu
output_i2s_quad.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
output_mqs.cpp MQS: Play nice 3 lat temu
output_mqs.h add output_mqs 5 lat temu
output_pt8211.cpp LC has no I2S0_TCR1 3 lat temu
output_pt8211.h Add Teensy LC Code for PT8211 3 lat temu
output_pt8211_2.cpp done :) 4 lat temu
output_pt8211_2.h add output_pt8211_2 5 lat temu
output_pwm.cpp Disable not-yet-working PWM output for Teensy 4.x 4 lat temu
output_pwm.h Add Teensy 4 PWM output 4 lat temu
output_spdif.cpp Fix compile errors on Teensy LC 4 lat temu
output_spdif.h SPDIF 5 lat temu
output_spdif2.cpp PROGMEM->FLASHMEM 4 lat temu
output_spdif2.h SPDIF 5 lat temu
output_spdif3.cpp spdif-input 4 lat temu
output_spdif3.h async spdif input -> friendclass of spdif output 4 lat temu
output_tdm.cpp Fix compile errors on Teensy LC 4 lat temu
output_tdm.h Add AudioInputTDM 7 lat temu
output_tdm2.cpp Fix TDM2 on Teensy 4.0 5 lat temu
output_tdm2.h various (see below) 5 lat temu
play_memory.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
play_memory.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
play_queue.cpp Allow larger queues on Teensy 3.5, 3.6, 4.0 5 lat temu
play_queue.h Allow larger queues on Teensy 3.5, 3.6, 4.0 5 lat temu
play_sd_raw.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
play_sd_raw.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
play_sd_wav.cpp allowing position + length to work during pause 4 lat temu
play_sd_wav.h sdwav play/pause initial commit 4 lat temu
play_serialflash_raw.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
play_serialflash_raw.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
record_queue.cpp Allow larger queues on Teensy 3.5, 3.6, 4.0 5 lat temu
record_queue.h Allow larger queues on Teensy 3.5, 3.6, 4.0 5 lat temu
spi_interrupt.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
spi_interrupt.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
synth_dc.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
synth_dc.h Import all of Frank's T4 edits 5 lat temu
synth_karplusstrong.cpp Fix compile errors on Teensy LC 4 lat temu
synth_karplusstrong.h Add Synthesis Guitar example 8 lat temu
synth_pinknoise.cpp Include Arduino.h first in all cpp files, for precompiled header speedup 6 lat temu
synth_pinknoise.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
synth_pwm.cpp Import all of Frank's T4 edits 5 lat temu
synth_pwm.h Add AudioSynthWaveformPWM 7 lat temu
synth_simple_drum.cpp Fix compile errors on Teensy LC 4 lat temu
synth_simple_drum.h Adding SimpleDrum synthesis object to audio library. 8 lat temu
synth_sine.cpp Import all of Frank's T4 edits 5 lat temu
synth_sine.h Do not assume AudioStream.h includes Arduino.h 8 lat temu
synth_tonesweep.cpp Fix discontinuity in frequency stepping in tonesweep, remove unnecessary/incorrect masking of phase 4 lat temu
synth_tonesweep.h ToneSweep improvements (thanks Pio) 7 lat temu
synth_waveform.cpp Merge pull request #362 from MarkTillotson/fix_phase_modulation 3 lat temu
synth_waveform.h Improve handling of pulse waveforms to allow sub-sample width pulses and finesse remaining issues with modulation 4 lat temu
synth_waveform.md Fixed AudioSynthWaveform. Uses LUT with linear interpolation for sinewave. 10 lat temu
synth_wavetable.cpp Fix compile errors on Teensy LC 4 lat temu
synth_wavetable.h Avoid global Wavetable defines 6 lat temu
synth_whitenoise.cpp Import all of Frank's T4 edits 5 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 and Teensy 4.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