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Bug 248

Summary: Request for 7.1 audio support
Product: SDL Reporter: Forest Hale <lordhavoc>
Component: audioAssignee: Ryan C. Gordon <icculus>
Status: ASSIGNED --- QA Contact: Sam Lantinga <slouken>
Severity: major    
Priority: P1    
Version: 2.0.0   
Hardware: x86   
OS: All   

Description Forest Hale 2006-06-11 04:38:49 UTC 
SDL has 5.1 audio support and I am requesting that 7.1 support be added, this should be very easy to do.

The full channel layout would be:
Front, Surround (aka Rear), Center/LFE, Side.  (see also bug #247 however)
Comment 1 Ryan C. Gordon 2009-12-15 22:37:34 UTC 
Changing bug priorities...

--ryan.
Comment 2 Sam Lantinga 2013-05-21 00:48:00 UTC 
Ryan, can you take a look and see what's left for 2.0 release?
Comment 3 Ryan C. Gordon 2013-05-21 21:44:30 UTC 
As far as I know, 7.1 is supported now.

A brief check suggests these drivers are good to go:

- pulseaudio
- directsound
- xaudio2
- coreaudio

...which covers Linux, Windows, and Mac OS X.

These are problems, and might be important as fallbacks:
- winmm explicitly clamps to stereo (probably a limitation of the API).
- ALSA doesn't set up a channel swizzle for 7.1, and has a FIXME (see swizzle_alsa_channels() in src/audio/alsa/SDL_alsa_audio.c)

...other systems I didn't check (because who has a 7.1 setup on Android, or BeOS, or SunOS?).

--ryan.
Comment 4 Sam Lantinga 2013-05-21 23:47:57 UTC 
Okay, I think once we have ALSA channel swizzling in, we're good to go.