[mythtv-commits] Ticket #8408: 24-bit audio support
MythTV
mythtv at cvs.mythtv.org
Sun May 2 01:52:04 UTC 2010
#8408: 24-bit audio support
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Reporter: anonymous | Owner: jyavenard
Type: enhancement | Status: new
Priority: minor | Milestone: unknown
Component: MythTV - Audio Output | Version: Unspecified
Severity: medium | Mlocked: 0
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Here's a patch for 32-bit audio support on NVIDIA Geforce 8300 mGPU and
GT2XX cards. The patch needs more work to play nicely with other audio
configurations. In particular, encoding to Dolby Digital is desirable when
32-bit audio isn't available.
ALSA 1.0.23 must be installed for the GT2XX to work. On the NVIDIA GeForce
8300 mGPU, the channel order is in SMPTE not ALSA so a remap is needed. On
Mythbuntu 9.10, the PCM buffer defaults to 64KB which isn't enough for
reliable audio playback. To get a buffer of 400 ms, I suggest:
echo 512 > /proc/asound/card1/pcm7p/sub0/prealloc
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Ticket URL: <http://svn.mythtv.org/trac/ticket/8408>
MythTV <http://www.mythtv.org/>
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