better source matching is still on our list, just behind things like the bloody 
button…
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I’m slowly migrating my music library from iTunes to my Plex server as Plexamp is getting more usable (finally a repeat button!). Still missing a “proper” desktop client or at least a bigger window listing more tracks at once but that’s for another day.
I’m having a similar (or the same) issue on Android and OSX as Plexamp is only playing two FLAC 5.1 channels. It’s not downmixing at all, just dropping the “other” 4 channels all together.
Hoping for a fix soon as this is one of the last few hurdles before finally throwing myself and my collection onto my Plex server.
we’ll be adding better “source matching” at some point, yeah.
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elan, adding source matching would really open the shield to the audiophile audience, Also would be great to play DTS .wav multichannel files.
Definitely would like support for 5.1 albums in both Plex and Plexamp
We all would…
Ok…
Now its feb 2021…
Any update?
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still on the list.
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Mind letting us know where it falls on the list?
thanks
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Still broken. Testing out my new Apple TV 4K. Would love this to finally be fixed and not have to use my ps4 with its old ps4 plex app just to hear 5.1 music. 
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I would like it too. I have a 5.1 setup on my PC.
By the way, for Plex on Android TV too It would be great too (for my 5.1 AVR setup) !!!
Just one more voice in the crowd looking for Plexamp PC 5.1 & 4.0 playback. I have a huge library of 90+ albums @ 4.0 and I have lost count of my 5.1 music. Foobar2000 is my go to player at the moment for surround music, but would really like it to be Plexamp. If I had my way, I would move this item to the top of the to do list! Thanks for listening, if you are 
While I’m at it, support for 5.1 wav as well, of course!!! I’m sure I would be pushing it to want support for dts, dff and the like, lol.
I am very pleased with Plexamp overall and look forward to it’s development and continued improvements!!!
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Gonna add to the pile…
My biggest confusion over this entire situation is that Plex on my PS3, years ago, could do this function fine. Then one day, one update, and it’s gone.
Please, what changed? What did you gain to cut this feature? How about why?
I understand the folks that want multichannel audio aren’t the largest population, and that we’re probably at the bottom of the list and will stay there. It’s what we are used to.
I mean, any “music” audio settings for some of the versions of the player would be nice…
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Gotta say, I’m jealous. Updated my PS3 and lost the functionality.
But what I really want is Roku support, much like your AppleTv desires…
Gonna jump into this here as well. I don’t mean to be a nag about it or anything, buuuuut…it has been promised to be addressed multiple times and its been well over a year since that was said. Based on how many people are commenting here, it seems like enough people want this resolved that it might be worth bumping up on the priority list a bit. I actually have a number of 5.1 FLAC files that get mixed down by Plexamp to a strange stereo hybrid that actually manages to drop audio from tracks entirely, making things sound very weird indeed.
This is for sure a Plexamp issue and not a limitation of PMS, because playing through the standard Plex desktop app (the PC Windows version, at least) actually separates the tracks just fine. If it can work on the general Plex app, why not Plexamp?
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Totally different player stacks. Short answer—it can, but it needs work.
On the list.
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Thanks. In fairness, I can use the standard Plex app for 5.1 audio in the meantime. Here’s an interesting observation though, which may either be of interest to you, or you may already be aware of it but, whatever. I figure more info, even if not needed, is better than not enough so here’s the interesting thing I noticed.
I did some testing with 5.1 FLAC on my 5.1 speaker setup connected to my PC. Tested on both a SoundBlaster Recond3Di (integrated soundcard) as well as a SoundBlaster ZxR audio card, set to default configuration for baseline. As far as I can tell, the results are the same between both audio solutions, but that would make some sense since they use the same SoundCore 3D chipset - the Recon3Di just has fewer features like no ASIO and other features that shouldn’t make a difference here. The only reason I mention it is that I have read that the DAC is quite different between the two (The Recon3Di being a significant downgrade from the ZxR) though I am hardly an expert in that. This is based on internet research from discussions in message boards. And of course, there is no way that info from an internet message board could be wrong…
Anyway, I’m only posting my audio specs in case somehow there is a factor at work here that involves the audio device on the PC either on the hardware or software level, because the issue with 5.1 not coming through on Plexamp seems to be in the mixdown and, as I said I’m not an expert, so I don’t know how much of this is handled by Plexamp versus the audio hardware\driver.
But the real interesting thing I found, and the real reason I wanted to bring this all up, was that the results I got when casting to my Sonos speaker out in the garage was significantly different. On the Sonos (casting from Plexamp) it actually seems to handle the 5.1 to stereo mixdown pretty well as far as I can tell. In truth, I didn’t detect any real problems at all. I did a test of this playing the 5.1 version of the Nine Inch Nails album The Downward Spiral, which I found is a great test because on some tracks, the vocals are separated into the rear channels, so if the mixdown isn’t processed right, I can tell immediately because some vocals will just vanish entirely, which is the case on my PC.
However, when casting to the Sonos, those channels don’t seem to get lost at all. In fact, even when it mixes down, it still actually sounds a bit richer and retains some separation of tracks versus the standard stereo version of the album. I should point out that I am playing this through a single PLAY:3 speaker, not as a mesh with any other speakers. I find this very interesting. I don’t pretend to know what is going on internally with the Sonos, but is this because the Sonos is handling the mixdown on the hardware level, and Plexamp is not a factor at all? Or does Plexamp still have some influence even if the audio is being streamed to the unit itself, as opposed to bluetooth? I suppose if it’s the former, then I’m a bit surprised with the Sonos. I honestly had somewhat written off the Sonos as being way overpriced for what it is, and too much of a walled garden system as opposed to other smart speaker solutions, despite admittedly sounding nice. But if the hardware is handling all that mixdown and doing a good job with it, I suppose I regret dabbling with Sonos a tad less now. But I was always under the impression that when casting to a device like a Sonos or Chromecast or whatever, it essentially was activating a version of the app in question that is installed on the device itself. So wouldn’t that mean that the Sonos is essentially running a slimmed down version of Plexamp that is locally installed on the speaker, or am I completely wrong in how casting actually works?
Anyway, I thought I’d just share that finding in the chance that it might prove useful. There’s a good chance that the two things aren’t related at all, you already know why this is and I’m not telling you anything new. In which case, I suppose the worst that came of this is I wrote up this post for nothing. But even in the off chance that this observation is useful or interesting to you, then I suppose it was worth a shot. Sorry if it was all a bit long winded, but like I said, the devil is often in the details, so I’d rather be overly detailed then risk leaving out a seemingly irrelevant detail that may be more critical than it would seem at first blush.
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Yeah, sorry! The Sonos is streaming directly from the media server.
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The regular 'ol Plex iOS app downmixes FLAC 5.1 just fine.
Many users have FLAC 5.1 music.
Plex app, and not Plexamp, will be the only way for them to hear their FLAC 5.1 music properly.
This is like the old tonemapping bugaboo except writ sonically. I kid!
While I wait for Plexamp to play my 5.1 files, how can I play these files on Plex? I have my files on an external hard drive connected to a NUC. The NUC is connected to my preamp.
As an aside, I have several FLAC 2.0 files that are downsampled, too. Is there any way keep the sample rate the same?
