Paul Stoffregen arbeitet seit einiger Zeit intensiv an der passenden Audiobibliothek für die erwähnten 32 Bit Teensy 3.x boards mit Cortex-M4. Die Ergebnisse können sich sehen lassen.
- Teensy Audio Library, high quality sound processing in Arduino sketches on Teensy 3.1
- Audio Adaptor Board for Teensy 3.0 - 3.6
- http://openaudio.blogspot.com/search/label/Teensy
- GitHub - PaulStoffregen/Audio: Teensy Audio Library
Some quotes:
Teensy 3.x have the Cortex-M4 DSP instructions (Whitepaper) which provide plenty of computational power for real-time FFT (spectrum analysis), opening up the possibility of creating advanced sound-reactive projects.
Teensy 3.1 & 3.2 are
theoreticallycapable of quad channel I2S audio. These pads are intended to allow a second audio board to be used, for 4 channel audio input and output! (TODO: 4 channel support has not yet been tested with Teensy 3.5 or 3.6)
Update: the Teensy Audio Library now supports quad channel output. For details, see File > Examples > Audio > HardwareTesting > SGTL5000 > QuadChannelOutput.
@einsiedlerkrebs hatte dieses auch schon hier drüben erwähnt:
Danke!