Wolfson Audio Card as guitar effect unit

Question

Hello,
does anybody know, if it would be possible to use the Audio Card as a guitar effect unit?
We are a group of three students, trying to achieve this project at our university. So far, we thought it should be possible after reading the datasheet and wanted to test it. The problem is, that we don't have the time to write our own drivers, so we tried to understand how the existing one works in c-files we found but were not able to comprehend.
Is there any documentaition available which explains for example how to route a signal from the line in jack to the line out jack?

-Ingo

Former Member · Answer

Hi,

It is possible but keep in mind that you will need a preamp stage (I am designing one at the moment) for instrument level to line level. Also if you want to drive a guitar amp then the output stage must be adjusted too (line level to instrument level - I'm not sure of this information).

Then it's just a matter of using the right configuration (rt-kernel - system tweaking (limits.conf)) & the right software (in my case pure data, there's also guitarix).

The good news is that Wolfson is very good at low latency when the system is configured correctly. I can get down to 4ms!! when patching the line in to line out directly using pure data / alsa. I didn't have any luck with jackd for the moment (xruns...).

Cheers!