[LAU] Low latency audio interface for the Beagle Bone Black?

[Martin Peach]

On 2014-02-20 15:34, Rafael Vega wrote:
> Hi, has anyone tried a usb sound card with the BBB? I want to connect my
> guitar to it and run some PD patches so something with low latency would
> be niiice :)
>

I have a Behringer UCA-202 attached to a BBB running Ubuntu. It's 
running a csound score that implements a variable delay line. Audio is 
48kHz stereo 16bit via ALSA, not sure what the latency is exactly but 
it's small.

> Also wondering how hard it would be to directly connect some ADCs and
> DACs. Has anyone tried?

The PRUSS is very interesting for high speed hardware interfacing, but 
it seems difficult to integrate with linux, you would need to write 
kernel drivers to work with ALSA or JACK. Connecting DACs and ADCs using 
I2C or SPI could work but how to synchronize with the audio system?


Martin