Katja, that's some good research especially considering the size of those interfaces. I'm mainly sticking with larger boxes which have XLR and jack inputs.

How is the performance overall ala dropouts, latency, etc?

I ran into issues with RPIs before that simply could not handle asynchronous with a more pro-sumer USB audio interface, leading to constant dropouts when running full duplex. I'm mainly using older but very solid Roland boxes (UA-25 and UA-25EX) which are stereo duplex USB 1.1, fully standard USB audio compliant, and work with pretty much anything including my iPhone.

I'm asking as I'd rather not go through the process of setting up a new system on yet another embedded device and get *less* performance than with my 500 Mhz wearable 10 years ago. :)

On Oct 10, 2017, at 5:49 PM, katja <katjavetter@gmail.com> wrote:

What I found is, small USB audio dongles don't process low frequencies
well because they use too small capacitors. This can be improved by
DIY soldering. Also some of them do a bad job in noise shaping,
leaving quantization noise in audible range. That is something you
can't improve. Here is a page describing some of my findings:

http://www.katjaas.nl/audiodongle/audiodongle.html

Good old Griffin iMic is better than the dongles I tried. But it is
nice to hack a dongle and make it a tiny bit better. Maybe it's time
to design our own audio dongle.

Katja

On Tue, Oct 10, 2017 at 3:41 PM, Dan Wilcox <danomatika@gmail.com> wrote:
For those of you using RPI 3s with Pd, how is the audio performance using a
standard stereo USB audio interface?

I'm talking simple, USB 1.1 full duplex at 16 bit, nothing fancy. No special
RPI-only backpack boards or GPIO audio debs, just regular usb audio devices.

--------
Dan Wilcox
@danomatika
danomatika.com
robotcowboy.com




_______________________________________________
Pd-list@lists.iem.at mailing list
UNSUBSCRIBE and account-management ->
https://lists.puredata.info/listinfo/pd-list


--------
Dan Wilcox
@danomatika
danomatika.com
robotcowboy.com