Most multi-channel material be it DTS or AC3 5.1 or anything really, usually have an overall gain of about 75db (+/-). If you have a sound system designed to accept these various multi-channel audio streams that may be OK and it may not. It depends on your system I suppose. Processing this material in the audio system may do something to it and make it OK. Couldn’t tell you. Over here at my house 75db is whisper quiet.
When things get shoved into a stereo environment - TV Speakers, External Speakers… whatever… and there is no multi-channel capabilities 75db is low, considering the industry standard for a well saturated audio stream is 89db. The result, as you may guess, is low volume. If that audio is in Direct Play Plex is unable to do anything. Some client devices and their Plex apps offer an ‘Audio Boost’ option, but that ONLY works if the audio is in Transcode. Audio gain can NOT be manipulated without actually changing the gain of the audio stream and that requires encoding - either on the fly with Plex’s transcoder or by some other means outside of Plex. Xmedia Recode, for instance.
With Xmedia Recode you have options you do NOT have in Plex - like setting the gain level to what works with your system. My system likes 89db. That’s what I feed it. I’ve got a wonder of Chinese (stolen) Technology (Cheap-Ass TV) with external speakers Frankensteined onto it. I have reasonable control over the Volume from 4 to 20 on the remote. 20 to 100 makes little difference, but if I get the gain to 89db 15 to 20 is the sweet spot.
Plex’s ‘Boost’ is the poor man’s shotgun approach to fly-swatting. It’s possibilities include: Small, Medium, Large and HUGE. What does that equate to? I haven’t got a clue and it’s very likely Plex doesn’t either and if they do they haven’t bothered telling anyone. If I use this Nuclear Audio Option I might get reasonable levels, get blown through the picture window, or have to use subtitles to read the audio I can’t hear. PITA? You betcha!
I know what my system wants, I tell Xmedia Recode to give it to me, it does, it’s over in a few moments and I can get on with my life.
An HTPC is going to be a box sitting near your TV - that you are usually in control of with an MCE Remote of some kind (10 foot system - or whatever they’re calling it). Those things can control PMP, Plexweb, OpenPHT, etc and they’re usually connected to the main TV with a wire(s).
These days that’s kind of a Dinosaur and many simply call their Plex Server their HTPC when really, it’s not, but serves the purpose I guess. If you’re using an HTPC and have an appropriate sound card in it, are sending it’s audio and video to the TV, you can make use of the built in Windows Audio Enhancements - designed for use with HTPCs oddly enough and your world is very different.
If you’re using a PC as a box to run Plex on - not actually a HTPC - not actually hooked up via a wire(s) to an input on the TV - there’s no way to use any of the Windows Audio Enhancements because Plex basically bypasses all of that. There is probably some very technical reason for doing it - or Plex is too busy developing things that annoy the hell of me to spend time figuring that bit out. Your guess is as good as mine.
I do have my Plex Server Box connected to my TV via wire(s) - for those times when nothing I do will fix DTS (Dedicated to Sound - or Dedicated to Silence? You tell me) and I have to employ Windows Enhancements and VLC/PMP/OpenPHT/Plexweb/etc., to watch something so badly encoded in the Audio Department it’s impossible to enjoy.
As my parting shot - when audio evolves to the point and has to be so advanced that it no longer falls into the range of Human Hearing I kinda think it’s time to step it back a notch or two. I’ve been listening to Stereo Audio since LONG before ‘Magic Carpet Ride’ by Steppenwolf and I have to tell ya that’s pretty much what I require of my audio. There’s a speaker for each earhole and I’m good with that.
If the gain is such that it wiggles the speaker cones creating sound waves and those waves reach my eardrums - let’s call it a day and a job well done.
