Back home again, and did some testing. I am now sure of the following :
Codec pack that is currently linked in the knowledge base has the problem, contistently. Each time, playback on left channel only.
My own old 3.3.1 codecs are playing fine. Two-channel, and yes, it really is stereo.
(Nice to hear the Parametric Stereo in effect, by the way : The stream starts out as two-channel mono. After approx. half a second, you can hear it changing to stereo. Very obvious, and fun to hear that my suspicion seemed right).
Tried most of the previous releases on johnvansickle.com, but, no joy⌠Most of them even have the right channel, instead of the left channel (?!)
That leaves me with no other choice, than to send you my old file.
I will send you a Private Message, later this evening.
Remove your own codec
Install âmyâ codec as described in the knowledge base
Restart Roon Server, and all should be fine.
Next up : Somebody should be informed of this bug. I donât know who, but itâs not Roon.
An FFMPEG developer, or one of its libraries ? This John van Sickle ? No ideaâŚ
So, i have successfully installed your codec file, and re-started. I have not re-added the AAC WNYC stream to test it. I will get to it, hopefully later tonight. I have not compared the two WQXR streams, but the MP3 one seems good, and in fact i was simply going down the path of âwhy fight it?â. None are idealâŚ
I will report what happens with the new (old) codec and the WNYC (93.9-FM) AAC stream.
Thanks for making the ffmpeg suggestion, this is very useful information indeed.
I have re-tested this behavior with an updated ffmpeg version and a rebooted ROCK and I am noticing the same behavior that @Just_Me reported, with audio only playing from the left side. This does indicate that it could be related to which version of ffmpeg ROCK is currently running and is very possible that itâs due to the AAC+ sideband that Marco mentioned.
I have noted this information with the technical team for closer inspection, we have had a few similar reports but the results have been different when testing for this behavior in the lab compared to different staff-members home setups.
Thanks again for bringing this to our attention and do let me know if you hear any difference with the ffmpeg version that Marco provided.
I wanted to touch base with some good news, which is that our technical team has also been able to reproduce this behavior and weâve opened up a bug report with the dev team. While I canât say for certain when this bug will be fixed, getting things reproduced in-house is a critical first step.
We are still investigating as to what the exact differences are between the codec versions and where itâs best appropriate to address this issue, but once I have any new information to share I will be sure to update this thread.
Any update on this? I just coupled my Rock with the amplifier (really quick one, using 3.5 mm plug) - and all the music plays with left only. Ropiee & other locations work fine. The only reasons I could imagine causing this is a cable issue (need to check) and possible issues on ROCK?
Well, the answer is that the recent AAC+ codecs have a bug. So either 1) use old ones or 2) use the MP3 codecs. Have heard of no âfixâ from Roon - they really need ot find a way to curate codecs and make this less of a science project.
This issue only affects AAC+ content. If the behavior is the same for your amp with other types of file formats such as FLAC, it may indeed be the cable.
We have an active ticket and are looking into why the newer versions of FFMPEG only cause one channel to be heard on AAC+ content, but I do not have any further updates at this time, the ticket is still pending review by the dev team.
Thanks :). Have to be honest : I wouldnât have found the solution, if I did not have this old file installed⌠
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