Results 1 to 6 of 6

Thread: LONG: Start guide to get multichannel sound for MP3, DVD, SAT, etc.?

  1. #1
    Constant Bitrate
    Join Date
    Sep 2005
    Posts
    161

    LONG: Start guide to get multichannel sound for MP3, DVD, SAT, etc.?

    First, sorry about the length of this post. I dunno if I should post this in the Car Audio
    section, but as this relates at least partially to how RR plays different media types I will start here. Anyway, my current setup includes a 7.1 soundcard in 5.1 mode (a Turtle Beach Montego DDL) driving the 6 speakers in my car. I'd previously tried the onboard sound (ALC650 on my nForce3 150 mobo), which had good volume levels but seemed to restrict me because plugging into the MIC and LINE IN jacks on the front panel prevented 6 channel mode from working. I also had an Audigy 2 NX, but I switched to the Montego when I was trying to t oubleshoot one of the following issues. My main problem is that when I use RR to listen to SIRIUS via the SIRIUS RS232 adapter I got
    from rush112.net about a year ago, I only get sound out of the center channel. Regardless of whether or not I connect it to my carpc
    via OPTICAL IN or LINE IN, I get 2 channel sound. However, when I play MP3s, I get sound out of at least my front and rears, and when I play DVDs I get 5.1 surround sound. Now, I know RR uses Winamp for playing mp3s, and I THINK it is up to my soundcard to convert that stereo source to multichannel sound. I think there are software solutions via Winamp plugins, but I don't think they have a good reputation and the hardware solution is probably better. I know RR uses Media Player Classic (in my case) when playing DVDs or other videos, and I believe in that case if the DVD is 5.1 MPC decodes it and my carpc plays it multichannel, and I believe if the video is a
    non 5.1 source, I still get multichannel sound, similar to MP3 stereo with cloned rears.

    To rehash, the main problem I have is that I can't figure out how to get RR or whatever app it is using to play multichannel. I don't care that the source is
    often mono or stereo, I would like the audio to come out of my rears as well for rear seat passengers, and also to help the volume be similar to when it plays other stuff, because with the sound only coming out of the center speakers, the volume is of course much lower relative to the other things I play in RR. I figure since anyone who knows how to do this is likely a carpc ninja with this stuff, I'd see if I could get a definitive answer on how to get
    multichannel sound from these different types, because it is really hard to tell when you are getting 4 channel sound, 5.1 or 6 channel sound, etc. in a car
    because of the environment. It's also not clear if different manufacturers or chipsets, at least, do stereo to multichannel conversion differently (e.g some for all stereo sources, some only on certain interfaces depending upon if they are ALC650, CM8768, etc.)

    Maybe it would be helpful if there was some sort of table we could then sticky, something like this:

    Media type: MP3
    Default RR player: Winamp
    Typical media encoding type: stereo
    Multichannel sound requirements:
    Creative Labs Audigy 2 software clones stereo automatically, on Turtle Beach you much enable DSP (this may not be accurate, it is just an example).

    Media type: DVD
    Default RR player: Media Player Classic
    Typical media encoding type: 5.1 surround sound
    Multichannel sound requirements: 1 5.1 capable soundcard. MPC decodes and sends it to your card, which then outputs it in 5.1.

    Media type: Satellite Streaming Audio (Sirius, XM)
    Default RR player: Road Runner
    Typical media encoding type: mono split to 2 channels
    Multichannel sound requirements: Most soundcards will not automatically convert this to multichannel ala MP3, etc. A Winamp plugin such as ExamplePlugin will allow it. On the Sirius RS232 interface, you must be using the standard line out instead of the optical cable, as the soundcard will not present the sound to the plugin properly if received via the optical interface (OK, this particular example is likely a load of BS, but I haven't figured it out and I wanted to present an example).

    If someone comes up with a good way to collect and present this, I will consolidate the first bit of it if others think it would be helpful to folks like me who didn't realize that there were all of these differences in sound output options....

    Thanks!!

  2. #2
    Constant Bitrate
    Join Date
    Sep 2005
    Posts
    161
    Just thought I'd bump this. I am concerned a lot of folks read this and initially think this is a non-issue, because they may not have a 5.1 configuration or Sirius/XM playing via RR. I know a lot of others do, and a bit of confirmation in a few areas would go a long way to us being able to help the future n00bs that come after us...

  3. #3
    Variable Bitrate fonseca's Avatar
    Join Date
    Apr 2005
    Location
    Virginia
    Posts
    323
    You would get more responses in the audio forum.

    Usually you just need to ensure that your speaker configuration is set to 5.1 in Windows audio properties, and enable 5.1 output/upmixing in your soundcard drivers as well.

    A definitive guide will be difficult as there are so many different setups in use. Some will upmix stereo sources in software, others use an external processor that does it, depending on the file types. I'm currently using the WinampAC3 plugin for sending dolby digital, the directshow filter for DTS, and Directsound for FLAC, MP3 and whatever else. DD and DTS are automatically sent completely unaltered to be decoded by my DSP and downmixed to 4.1. Everything else goes through the Windows mixer as PCM (which unfortunately resamples everything to 48khz) and my DSP upmixes to 4.1.

    In MPC I have spdif selected in FFDShow for AC3 and DTS. It upmixes stereo.

    For similar volume between sources, I disabled Winamp volume and mapped master to wave in RR, which I keep around 60%. MPC is at max, and I actually have some gain to get videos to be close to the same volume as Winamp. I believe I have normalization enabled as well.
    In progress: M10000; Travla c134; Xenarc 700TSV; Hitachi 80GB 2.5"; 256MB ULP; M2-ATX; ITPS; Powermate; iKEY SL-88 KB; Holux GM-210; Audiobahn ADD51T w/ COAX/optical converter; Road Runner; iGuidance 2.1

  4. #4
    Constant Bitrate
    Join Date
    Sep 2005
    Posts
    161
    Cool. This is good info, and I will try your suggustions. I do have WIndows and the soundcard info at 5.1 - I cannot figure out why it won't go to 5.1 sound with the Sirius stream unless it is something RR is doing. I believe this has been the same behavior using all three sound cards I'd tried now.

  5. #5
    Constant Bitrate
    Join Date
    Sep 2005
    Posts
    161
    Quote Originally Posted by fonseca
    You would get more responses in the audio forum.

    Usually you just need to ensure that your speaker configuration is set to 5.1 in Windows audio properties, and enable 5.1 output/upmixing in your soundcard drivers as well.

    ...For similar volume between sources, I disabled Winamp volume and mapped master to wave in RR, which I keep around 60%. MPC is at max, and I actually have some gain to get videos to be close to the same volume as Winamp. I believe I have normalization enabled as well.
    Fonseca - I ensured I had a similar config, but I still have the same issue, FWIW, so I think it is RR and the way it handles line in with or without the plugin.

  6. #6
    Constant Bitrate
    Join Date
    Sep 2005
    Posts
    161
    Due to lack of response, only focusing on the core problem for now:

    http://www.mp3car.com/vbulletin/show...d=1#post875194

Similar Threads

  1. Embedding BSPlayer
    By Needstorage in forum Software & Software Development
    Replies: 17
    Last Post: 01-29-2007, 04:15 AM
  2. USB sound + USB DVD = SLOW
    By TimW in forum General Hardware Discussion
    Replies: 4
    Last Post: 06-23-2006, 02:19 PM
  3. win dvd no sound
    By aco in forum Road Runner
    Replies: 3
    Last Post: 11-11-2005, 03:24 AM
  4. Programming Question in VB
    By az1324 in forum Software & Software Development
    Replies: 8
    Last Post: 10-01-2004, 10:24 PM
  5. never lose focus
    By marsjell in forum Software & Software Development
    Replies: 21
    Last Post: 08-12-2002, 02:18 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •