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

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