Roon Core Machine
NUC PC with i3 processor and 4Gb of RAM running Windows 10 Pro.
Networking Gear & Setup Details
Ethernet connection to Synology Diskstation over Google Wifi Pro.
Connected Audio Devices
HDMI to Sony STR-DA5300ES AVR.
Number of Tracks in Library
32440 tracks
Description of Issue
As well as stereo albums, my music collection contains many multi-channel albums (I have 4.0, 5.0, 5.1 and 7.1 albums, mostly FLAC with a few DSD).
I like to listen to all my music in surround sound: so my AVR automatically applies ProLogic IIx to every stereo file, whilst multi-channel files are played as they are.
I use a convolution filter provided as a .zip containing multiple cfg files along with the necessary impulse response files. Separate cfg files cover sample rates of 44, 48, 88 and 96kbs and each of stereo, 4-channel, 5-channel, 6-channel and 8-channel files. I can send you the zip file if you need it.
I am told Roon will choose the best match filter according to the sample rate and channel configuration, but for me this doesn’t appear to be on a track by track basis. What I find is if I first play a stereo track and then any multi-channel track, only the front two speakers of the multi-channel track play. If I play a multi-channel track and then a stereo track, my AVR sees the stereo track as multi-channel and doesn’t apply ProLogic IIx. It appears to me that the first track played in a session determines the filter used thereafter.
Is this an error in my setup, is it a bug or is it a design limitation?
I have a sort of work around: separate convolution filters for stereo and surround albums; but that fails with Roon Radio because tracks of random channel configuration are played consecutively.