Linux + Roon + Mutec MC3+ USB problem

Support
1

Hello,

This might be tricky (hopefully it won’t be! hah).

I have custom music server:
i7
16Gb Ram
m.2 30Gb System drive
SSD 1Tb music drive
Tidal
Running Euphony (Linux) + Roon Server
Connceted via ethernet

  • Mutec MC3+ USB

It all sounds great when it works BUT
from time to time when playback changes (from one track to another) it just “loses the signal”. I have to restart Mutec to make it work again.
It looks like it struggles when changing a track from 16bit to 24bit… I’m not 100% sure.
I adjusted delay up to 7000ms in Roon - it didn’t help.

The fact is when I use Euphony’s Stylus (built in audio player app) it works fine.

Any help would be appreciated.

cheers,
Adam

2

This may be the USB chip bug that is discussed in another thread here. If so, Mutec will need to update their firmware to correct it.

3

OK, thanks.

For now I’m testing Euphony’s native player… we will see if the same problem occur.

If it’s “USB chip bug” it should be a problem on Euphony’s player app as well… I think.

5

If the MC3+ uses an XMOS chip, then it’s almost assuredly bugged unless they’ve released a firmware update recently. And it CAN show differently based on the software used. The bug is triggered in a race condition, and Roon is very quick when switching modes between tracks. If other players introduce delay, then they might not exhibit it.

Have a look at the master thread for more details: DAC issues with XMOS usb chipset and Roon on Linux

6

thanks @cwichura! I will contact Mutec…

7

Yep sounds like the XMOS bug as it effects the bit depth change in this manor. I could not repeat it using MPD but Roon it would happen most of the time but only via Linux it never happens in Windows or Mac.

8

yup, MPD works fine… damn it.