[mythtv] [mythtv-commits] Ticket #1104: multi channel audiosupport

Mark Spieth mark at dclabs.com.au
Sat Jan 28 05:05:04 UTC 2006

this is planned but will happen after the rest is in place. 
assuming it is dolby prologic encoded 2ch audio.
LFE=ignore or LPF 100Hz C (not sure the correct value)
LS=RS=L-R or perhaps LS=L-R, RS=R-L with perhaps a 30ms delay.
otherwise there will be a problem playing out 2ch on a 6ch audio out system (you would only get L and R with sound)
  ----- Original Message ----- 
  From: Steven Adeff 
  To: mythtv-dev at mythtv.org 
  Sent: Saturday, January 28, 2006 2:11 PM
  Subject: Re: [mythtv] [mythtv-commits] Ticket #1104: multi channel audiosupport

  On 1/27/06, MythTV <mythtv at cvs.mythtv.org> wrote:
    #1104: multi channel audio support
    Reporter:  Mark Spieth  |        Owner:  markspieth
         Type:  enhancement  |       Status:  new
    Priority:  minor        |    Milestone:  unknown
    Component:  mythtv       |      Version:  head
    Severity:  medium       |   Resolution:
    Comment (by Mark Spieth):

    added 14 which fixes
    - ac3 audio amplitude levels are now invariant (encode/decode produces
    same levels)
    - only allow 2 and 6 channel modes
    - if 6 channel on decode and want 2 then use DOLBY surround encoding 
    - decode to and encode from L,R,LS,RS,C,LFE format

    Ticket URL: <http://svn.mythtv.org/trac/ticket/1104>
    MythTV < http://www.mythtv.org/>

  could  your work be used to convert 2 channel dolby surround into a 5.1 signal?



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