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  1. #1

    Distorted output with Behringer UCA202 USB sound card

    Having enjoyed piCorePlayer with just it's analog output for a couple of years, I fancied upgrading the audio output. As I already have a Behringer UCA202 USB interface which does me proud from my laptop, I thought I'd use that - not the best, but really not bad.

    Connected & configured in piCorePlayer nice and easily, and sounds great. The next day, I suddenly noticed some distortion on one channel. Rebooted the Pi and all was well, until a day or so later and the distortion had returned. It seems like piCorePlayer will play fine through the interface for 24-36 hours before the distortion appears. Restarting Squeezelite appears to be the minimum required to reset it back to correct operation - but only for a while.

    I've got two of these interfaces, and both appear to misbehave in the same way.

    I've uploaded recordings of this in action on Soundcloud here with well behaved playback, distorted playback, along with a recording from the analog output.

    Has anyone else experienced this problem? Or uses the Behringer UCA202 interface without problem?

    Unless there's anything obvious, I'm tempted to give up on this and either return to the analog output or get a HiFiBerry hat - which could be slightly awkward, given the Aluminium Amour heatsink case I'm using.
    Server: LMS 8.1.1 on piCorePlayer 7.0.0 on Pi 4B 2GB with library on 512GB USB drive
    Listening on: 2 x Squeezebox Radios 8.0.1 , and direct from the Pi using a Behringer UCA202 USB audio interface

  2. #2
    Senior Member paul-'s Avatar
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    Not sure what would cause one channel to act up. From your sig, looks like you are using a RPI4. Which USB ports are you using?
    piCorePlayer a small player for the Raspberry Pi in RAM.
    Homepage: https://www.picoreplayer.org

    Please donate if you like the piCorePlayer

  3. #3
    Quote Originally Posted by paul- View Post
    Not sure what would cause one channel to act up. From your sig, looks like you are using a RPI4. Which USB ports are you using?
    I'm mystified too! Especially as it's all fine for a day or so, and then turns bad.

    Yes, a RPi 4. I've got a 512GB USB key for my music library in the bottom right (USB3) port. I've had the UCA202 initially in the bottom left (USB2) port, and then tried it in the top right (USB3) port - the problem is the same in both. And it does seem to be a sudden onset - I've heard the distortion arrive on two occasions.

    From googling around, I can't find much info from others using this interface on their piCorePlayer setup. Though, like I said, the interface has performed flawlessly on a Windows PC for years before this.
    Server: LMS 8.1.1 on piCorePlayer 7.0.0 on Pi 4B 2GB with library on 512GB USB drive
    Listening on: 2 x Squeezebox Radios 8.0.1 , and direct from the Pi using a Behringer UCA202 USB audio interface

  4. #4
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    Quote Originally Posted by AlecSp View Post
    I'm mystified too! Especially as it's all fine for a day or so, and then turns bad.

    Yes, a RPi 4. I've got a 512GB USB key for my music library in the bottom right (USB3) port. I've had the UCA202 initially in the bottom left (USB2) port, and then tried it in the top right (USB3) port - the problem is the same in both. And it does seem to be a sudden onset - I've heard the distortion arrive on two occasions.

    From googling around, I can't find much info from others using this interface on their piCorePlayer setup. Though, like I said, the interface has performed flawlessly on a Windows PC for years before this.
    A couple or so ideas:

    Try both on the usb2

    Which power supply are you using for the rpi4

    Can you connect both devices through a powered usb hub?

    ronnie

  5. #5
    Some good suggestions.

    I'll try both UCA 202 and USB memory stick on the two USB 2 sockets. Not an ideal outcome, as one of the reasons I recently updated from Pi 3B+ to 4 was to get the fast USB 3 port to bring the local library on the memory stick up to decent speed (which it does in spades, a full library scan went from 40 mins on the Pi 3B+ to 9 mins on the Pi 4).

    I could also try using the Pi 4 with the UCA 202 and no USB memory stick, with a remote mounted network share for the music library. Again, not a great solution, but might help shed light on the problem.

    Good point on the PSU - it's not an official Raspberry Pi one, but it does claim to have a 3A output. For what it's worth, the model number is XBS-0530, sold as a Pi & PSU package here.

    The UCA 202 documentation does give the current draw of the UCA 202 over USB as 100mA at 5v. Hard to know what the memory stick could consume - USB 3 can in theory deliver 900 mA, but not sure if a memory stick would draw this much?

    I don't have a powered USB hub to try.

    I still have my Pi 3B+, which I hadn't tried the UCA 202 with. I've just set it up to have a play with too.

    Given that it takes 24 hours or so for the problem to show up, it'll be a few days before I've got anything to show from my experiments. Appreciate the input!
    Server: LMS 8.1.1 on piCorePlayer 7.0.0 on Pi 4B 2GB with library on 512GB USB drive
    Listening on: 2 x Squeezebox Radios 8.0.1 , and direct from the Pi using a Behringer UCA202 USB audio interface

  6. #6
    Senior Member
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    @AlecSp

    Well I did a search for raspberry pi power supply XBS-0530

    and found this (note the conclusion)

    https://lygte-info.dk/review/USBpowe...0530%20UK.html


    Official PS are available

    https://shop.pimoroni.com/collections/raspberry-pi?filter=Power



    It might be worth looking in a few logs thext time it happens.

    On LMS go to Settings > Information > scroll to the bottom of the page for Server log info.

    On pCP, Main Page > Diagnostics.

    ronnie

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