blueberrymountains
Posts: 4
Joined: Fri Jun 07, 2019 9:28 pm

Do you use a USB audio interface with Raspberry Pi?

Mon Jun 17, 2019 7:18 pm

If so, which USB audio interface do you use?

Have you been happy with it?

[Edit: added "with Raspberry Pi" to the subject, and "If so," to the first line of the post.]

IanS
Posts: 229
Joined: Wed Jun 20, 2012 2:51 pm
Location: Southampton, England

Re: Do you use a USB audio interface with Raspberry Pi?

Tue Jun 18, 2019 10:18 am

I use Behringer UCA202/222s, because I need something with RCA connectors rather than jack sockets but still cheap. The sound quality is good, but I cannot get them to work in stereo mode for some reason. ALSA sees them as a single channel device.

LTolledo
Posts: 1548
Joined: Sat Mar 17, 2018 7:29 am

Re: Do you use a USB audio interface with Raspberry Pi?

Tue Jun 18, 2019 9:23 pm

During my early months with the RPi I did a lot of experimenting on improving audio quality on my setup, as the default method had unsatisfactory results (hiss, hum, crackles)

My test unit then consist of
a. RPi3B, 2.4GHz wireless keyboard and mouse, 7" monitor
b. DIY Stereo Amp based on NJM2073D audio amp IC (quite sensitive to power line noise). connected to RPi3B's audio jack
c. DIY Setero audio VU meter based on LM3915 IC (still in breadboard setup), connected in parallel with audio amp's audio input
d. single power supply 5v 3.0A, supplying the 3 above (except for the monitor)
e. a pair of small 1w 8ohm speaker in make-shift cardboard baffles
f. OS was Raspbian Jessie with Pixel.

So I tested some of my USB Audio Dongles
1. an old Sound Blaster XFi Go: Audio was better than with RPi's on-board audio, and yes, definitely stereo output
2. a cheap Pluggable "brand" USB audio dongle: very good results, not much different from Sound Blaster, stereo output
3. another cheapo no-name USB dongle "7.1 channel capable": same as with 2, but configured as stereo only.

confirmation of audio "separation" was done using
https://www.youtube.com/watch?v=hTvJoYnpeRQ
visually can be seen on the VU meter display.
settled on using the Pluggable audio dongle for the mean time...

For the best possible audio experience with the setup above I had to use separate 5v 1A power supply for the audio amp and VU meter combo.
Used the setup for about 3 months before I decided to upgrade further...
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"

Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"

blueberrymountains
Posts: 4
Joined: Fri Jun 07, 2019 9:28 pm

Re: Do you use a USB audio interface with Raspberry Pi?

Wed Jun 19, 2019 8:31 pm

Thanks very much for your responses, IanS and LTolledo. :)

The Sound Blaster-style USB dongles are an interesting angle, I was looking more for an interface with XLR inputs and mic preamps like the Lexicon Alpha (which is reasonably priced), but I'll look into this other avenue too — thanks for the suggestions and all the detailed notes.

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