Roonserver Docker container running in unRAID 6.9.2
Xeon E3-1245v5, 32GB RAM, Docker containers in Samsung Evo 860 250GB SSD
Networking Gear & Setup Details
Ubiquiti UDM Pro, USW-16 / USW-24-G2 switches
Connected Audio Devices
Matrix Mini-i Pro 3 (Ethernet to USW-24-G2)
Lumin X1 (Ethernet to USW-24-G2)
Number of Tracks in Library
Description of Issue
RAAT playback on Matrix Mini-i Pro 3 consistently fails with the following error:
“Unexpected failure communicating with audio device”
“Too many failures. Stopping playback”
Playback on Lumin X1 is flawless and stable, both connected via Ethernet to the same switch.
Roon via Airplay to Matrix Mini-i Pro 3 also works flawlessly.
Prior to today, RAAT on the Matrix Mini-i Pro 3 was spotty but worked. Playback would simply stop after a random amount of time (30-90 minutes). Have performed a cold restart of both the Matrix Mini and the Core (including the unRAID host).
Ok so after numerous restarts of Core and endpoint to no avail, what finally got it to work was disabling Parametric EQ and Procedural EQ (which I had been using for mono output). Oddly, toggling it back on still works, but for now I have it off to test and RAAT has been streaming for over an hour without issue…
Thanks for chiming in Peter. Yes, it’s likely the source sample rate has something to do with it. When it consistently failed previously I was attempting to play an album - all with the same sample rate. When cycling through Roon Radio, it works for a while then eventually stops.
Here’s what the signal path looks like this when it works:
So it looks like nothing to do with the Matrix Mini - I tried the same DSP on the Lumin X1 with the same error. Drilling down further, it’s only the Procedural EQ (to create a mono mix) that’s causing this. I followed the instructions from this post:
And furthermore the error only seems to occur with higher bit rate material (16/44 is fine).
Peter, not sure why it appears as a “7.1 channel mapping” but I’m simply creating a matrix routing in the procedural EQ to route Left->Left, Left->Right, Right->Right and Right->Left, each reduced by 3dB, to create a mono output (wish there was a simpler way to do this).