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PaulStoffregen de39e6f790 WAV header parse for 44100 10 vuotta sitten
examples Shorten example folder from SGTL5000_Specific to SGTL5000 10 vuotta sitten
gui Update ADC documentation in GUI, but optional pin number 10 vuotta sitten
utility Make input ADC and output DAC play nicely together 10 vuotta sitten
Audio.h Add AudioRecordQueue (work in progress) 10 vuotta sitten
AudioControl.h Add AudioSynthWaveformSine 10 vuotta sitten
README.md Update readme still yet again 10 vuotta sitten
analyze_fft256.cpp Add proper API to FFT objects 10 vuotta sitten
analyze_fft256.h Simplify & document SGTL5000 control 10 vuotta sitten
analyze_fft1024.cpp Add proper API to FFT objects 10 vuotta sitten
analyze_fft1024.h Add proper API to FFT objects 10 vuotta sitten
analyze_peak.cpp Change peak detect API to conform to library conventions 10 vuotta sitten
analyze_peak.h Change peak detect API to conform to library conventions 10 vuotta sitten
analyze_print.cpp Change AudioAnalyzePrint name API 10 vuotta sitten
analyze_print.h Change AudioAnalyzePrint name API 10 vuotta sitten
analyze_tonedetect.cpp mode documentation in the GUI 10 vuotta sitten
analyze_tonedetect.h Add MIT license 10 vuotta sitten
control_sgtl5000.cpp Simplify & document SGTL5000 control 10 vuotta sitten
control_sgtl5000.h Document sgtl5000 10 vuotta sitten
control_wm8731.cpp Update WM8731 example 10 vuotta sitten
control_wm8731.h Update WM8731 example 10 vuotta sitten
data_ulaw.c Add missing open source license headers 10 vuotta sitten
data_waveforms.c Remove old AudioSynthWaveform 10 vuotta sitten
data_windows.c Add other window types for 1024 point FFT 10 vuotta sitten
effect_chorus.cpp Change Chrous effect to one channel 10 vuotta sitten
effect_chorus.h remove unimplemented stop() 10 vuotta sitten
effect_delay.cpp Remove unused multiplier 10 vuotta sitten
effect_delay.h Add AudioEffectDelay 10 vuotta sitten
effect_envelope.cpp Add AudioEffectEnvelope 10 vuotta sitten
effect_envelope.h Add AudioEffectEnvelope 10 vuotta sitten
effect_fade.cpp Add MIT license 10 vuotta sitten
effect_fade.h Add MIT license 10 vuotta sitten
effect_flange.cpp Change Flange effect to one channel 10 vuotta sitten
effect_flange.h remove unimplemented stop() 10 vuotta sitten
effect_multiply.cpp Add AudioEffectMultiply 10 vuotta sitten
effect_multiply.h Add AudioEffectMultiply 10 vuotta sitten
filter_biquad.cpp Improve Biquad filter 10 vuotta sitten
filter_biquad.h Improve Biquad filter 10 vuotta sitten
filter_fir.cpp Impove and document FIR filter 10 vuotta sitten
filter_fir.h Impove and document FIR filter 10 vuotta sitten
filter_fir.md Change FIR filter (as suggested by rheslip) to filter one channel instead of two. Updated example, added documenting file 10 vuotta sitten
filter_variable.cpp Add credits/references for numerical approximation algorithms 10 vuotta sitten
filter_variable.h Finish AudioFilterStateVariable (signal control of corner frequency) 10 vuotta sitten
input_adc.cpp Remove old debugging stuff from AudioInputAnalog 10 vuotta sitten
input_adc.h Allow AudioInputAnalog to use different pins 10 vuotta sitten
input_i2s.cpp Avoid allocating unneeded DMA channels 10 vuotta sitten
input_i2s.h Use DMAChannel begin() 10 vuotta sitten
keywords.txt Improve Biquad filter 10 vuotta sitten
mixer.cpp Add MIT license 10 vuotta sitten
mixer.h Add MIT license 10 vuotta sitten
multiplier.md Add a multiplier (by rheslip) 10 vuotta sitten
new_objects.md change format for new_objects files 11 vuotta sitten
output_dac.cpp Avoid allocating unneeded DMA channels 10 vuotta sitten
output_dac.h Use DMAChannel begin() 10 vuotta sitten
output_i2s.cpp Avoid allocating unneeded DMA channels 10 vuotta sitten
output_i2s.h Use DMAChannel begin() 10 vuotta sitten
output_pwm.cpp Avoid allocating unneeded DMA channels 10 vuotta sitten
output_pwm.h Make input ADC and output DAC play nicely together 10 vuotta sitten
play_memory.cpp Add status and position functions to AudioPlayMemory 10 vuotta sitten
play_memory.h Add status and position functions to AudioPlayMemory 10 vuotta sitten
play_queue.cpp Add AudioPlayQueue 10 vuotta sitten
play_queue.h Add AudioPlayQueue 10 vuotta sitten
play_sd_raw.cpp register SPI interrupt when playing WAV & RAW files 10 vuotta sitten
play_sd_raw.h Fix status functions in AudioPlaySdRaw 10 vuotta sitten
play_sd_wav.cpp WAV header parse for 44100 10 vuotta sitten
play_sd_wav.h Fix audible click at end of Wav file playing 10 vuotta sitten
record_queue.cpp Finish AudioRecordQueue and Record example 10 vuotta sitten
record_queue.h Finish AudioRecordQueue and Record example 10 vuotta sitten
spi_interrupt.cpp Add SPI interrupt registration layer 10 vuotta sitten
spi_interrupt.h register SPI interrupt when playing WAV & RAW files 10 vuotta sitten
synth_dc.cpp Add AudioSynthWaveformDc 10 vuotta sitten
synth_dc.h simplify overflow checks somewhat 10 vuotta sitten
synth_pinknoise.cpp Clean up harmless compiler warnings 10 vuotta sitten
synth_pinknoise.h Add AudioSynthNoisePink 10 vuotta sitten
synth_sine.cpp Add MemoryAndCpuUsage example 10 vuotta sitten
synth_sine.h Add phase() to waveform objects 10 vuotta sitten
synth_tonesweep.cpp Fix up synth_tonesweep and the example to conform (more closely) to the naming conventions 10 vuotta sitten
synth_tonesweep.h Clean up harmless compiler warnings 10 vuotta sitten
synth_waveform.cpp Add simple pulse waveform 10 vuotta sitten
synth_waveform.h Clean up harmless compiler warnings 10 vuotta sitten
synth_waveform.md Fixed AudioSynthWaveform. Uses LUT with linear interpolation for sinewave. 10 vuotta sitten
synth_whitenoise.cpp Fix multiple white noise instances 10 vuotta sitten
synth_whitenoise.h Fix multiple white noise instances 10 vuotta sitten

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