At a glance
- Audio DSP with Raspberry Pi
- Stereo analog input
- Raspberry Pi I2S input and output (2 channels)
- 4 Channel analog output
- You can design your filters by yourself and upload them from the Raspberry
- Standalone operations possible
- 4 GPIO ports from the DSP for external controls (potentiometers, switches, LEDs)
This is our first DSP project. It is based on a small Analog audio DSP chip. The board can be used for all kinds of audio manipulations. It is especially interesting for loudspeaker crossovers. You can implement a crossover for a stereo speaker pair or a single 4-way crossover.
While we have a prototype of this board running, we don’t plan to produce and sell these in the near future.
- The thread on raspberrypi.org where the development of I2S sound for the Raspberry Pi started: http://www.raspberrypi.org/phpBB3/viewtopic.php?t=8496
- How to compile a Linux kernel with I2S support: http://www.noiseisgood.co.nz/?p=365
- Another guide to compile the kernel for the Raspberry Pi with I2S: http://blog.koalo.de/2013/05/i2s-support-for-raspberry-pi.html
- Phil Pool created an ALSA driver for the Raspberry Pi and I2S: https://github.com/philpoole