<div dir="ltr">I don't want to discourage you, but from my experience there's definitely some things to be wary of with the Raspberry Pi. For example, a lot of people have reported needing to use USB 2.0 devices in USB 1.1 mode. I don't know if this would necessarily hinder the functionality of the device, but it seems like it could be a nuisance.<div>
<br></div><div>Personally, I've been using an interface with a single stereo input and output (Behringer UCG102) for my guitar. Performance for that device has been fairly satisfactory, but there are some problems I can't seem to resolve...</div>
<div><br></div><div>I get buffer xruns every ten seconds or so when running PD, even in -nogui mode with realtime priorities. This sounds like a little "pop," a one sample impulse, and while it's not unplayable, it is annoying. I am running at a pretty low latency (~8ms, which is awesome), but even raising the latency a little and messing around with the signal vector size doesn't seem to help stop the popping.</div>
<div><br></div><div>Also, while it's not super important for my guitar processing, I've been unable to run duplex audio at a samplerate higher than 32kHz. It seems that this is related to an issue in newer versions of the kernel (there's an issue posted here: <a href="https://github.com/raspberrypi/firmware/issues/197">https://github.com/raspberrypi/firmware/issues/197</a>). I don't know anything about Operating System code, so I have no idea if this could be addressed somehow.</div>
<div><br></div><div>So while I can't say that multi-channel input and output won't work, I will say that even stereo I/O is a little broken. </div><div><br></div><div>I wonder if the BeagleBone xM would be better for this project? It is a bit pricier, but it seems like Stanford CCRMA students have had some success with it (more than the Pi, anyway) </div>
<div>Check out this link for examples of that:</div><div><a href="https://ccrma.stanford.edu/~eberdahl/satellite/">https://ccrma.stanford.edu/~eberdahl/satellite/</a></div><div><br></div><div>Good luck,</div><div><br></div>
<div>Brian</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Jan 23, 2014 at 7:31 PM, Chris McCormick <span dir="ltr"><<a href="mailto:chris@mccormick.cx" target="_blank">chris@mccormick.cx</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hey Jaime,<br>
<br>
On 24/01/14 01:48, Jaime E Oliver wrote:<br>
> there was a thread on this just a while back and someone reported multiple inputs, I cannot find it right now, but it;s there!<br>
<br>
I spent a fair bit of time reading back through the archives and various<br>
other sources yesterday and I did see mention of someone running four<br>
inputs but a later post seemed to contradict what they'd said, and I<br>
couldn't find anything on pd-list about that in particular.<br>
<br>
Would love to be wrong about that of course!<br>
<br>
In any case, I will report back here if successful.<br>
<div class="HOEnZb"><div class="h5"><br>
Cheers,<br>
<br>
Chris.<br>
<br>
--<br>
<a href="http://mccormick.cx/" target="_blank">http://mccormick.cx/</a><br>
<br>
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