Any details coming out of the PDC regarding the re-written audio stack?
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I too want info on this.
Scoble can you tell us when the Larry video will ship?
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scobleizer
I'm the video guy
Tomorrow.
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Minh
WOOH! WOOH!
Too much hype & anticipation. It's just gonna disappoint. Just like Star Wars ep I, II, III.scobleizer wrote:Tomorrow.
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Tom Servo
W-hat?
Since there's no NDA on beta 1... The new audio stack drops all hardware acceleration and is as of broken in multiprocessor mode. Internally, it seems to have been restructured, using things called audio transform modules (or something), that'll take care of getting the data prepared for optimal output. Other than that, details are sketchy.
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Minh
WOOH! WOOH!
How's DRM woven into this? Are the days of re-recording a DRM-protected WMA files gone for good?Tom Servo wrote:Since there's no NDA on beta 1... The new audio stack drops all hardware acceleration and is as of broken in multiprocessor mode. Internally, it seems to have been restructured, using things called audio transform modules (or something), that'll take care of getting the data prepared for optimal output. Other than that, details are sketchy.
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Tom Servo
W-hat?
No idea. I'm sure there's some DRM in there, but I don't expect Total Recorder et al to break. At least I can't remember anything about an audio equivalent of PVP-OPM.
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Minh
WOOH! WOOH!
Frankly, I'd be SHOCKED if DRM is not involved in the stack.Tom Servo wrote:No idea. I'm sure there's some DRM in there, but I don't expect Total Recorder et al to break. At least I can't remember anything about an audio equivalent of PVP-OPM.
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Minh wrote:
Frankly, I'd be SHOCKED if DRM is not involved in the stack.
Tom Servo wrote: No idea. I'm sure there's some DRM in there, but I don't expect Total Recorder et al to break. At least I can't remember anything about an audio equivalent of PVP-OPM.
You can playback DRM'ed content using the new stack, that's certainly true
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Tom Servo wrote:Since there's no NDA on beta 1... The new audio stack drops all hardware acceleration and is as of broken in multiprocessor mode. Internally, it seems to have been restructured, using things called audio transform modules (or something), that'll take care of getting the data prepared for optimal output. Other than that, details are sketchy.
It shouldn't be broken in any mode, as far as we've heard, if you're hearing bugs, I'd love to hear about them.
The audio stack is a total, bottom-up rewrite, entirely in user mode. The DSP that used to be done by sysaudio is now being done with pluggable modules called Audio Processing Objects, or APOs.
The video tomorrow will have more info than that.
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Cairo
I want my waffle sundae, give me my carbs!
"The audio stack is a total, bottom-up rewrite, entirely in user mode. "
Can drivers live in usermode now?
p.s. The new textbox is still buggy.
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Minh
WOOH! WOOH!
But can you RECORD a playing DRM'ed content?LarryOsterman wrote:Minh wrote: Frankly, I'd be SHOCKED if DRM is not involved in the stack.
You can playback DRM'ed content using the new stack, that's certainly true
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Other than security ^shrug^ I don't see the advantage in placing the audio bits in user-mode. In fact it sounds like a way to make the audio sub-system laggy to me.
Edit: This would also 'fix' fast-user switching where music can continue to play while you switch users. -
Manip wrote:
Other than security ^shrug^ I don't see the advantage in placing the audio bits in user-mode. In fact it sounds like a way to make the audio sub-system laggy to me.
Edit: This would also 'fix' fast-user switching where music can continue to play while you switch users.
Humorously enough, the "stop playing on fast user switching" feature (and yes, we had that as a feature) was left on the cutting room floor. Losing that feature was it was my biggest regret in Vista.
And there are a LOT of really good reasons, not the least of which is the ability to remove seven different device drivers. Don't understimate the impact of that, it's actually huge.
Moving the audio stack to user mode also enabled a huge amount of flexibility in what we can do with the stack, some of which will come out in the video.
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Cairo wrote:"The audio stack is a total, bottom-up rewrite, entirely in user mode. "
Can drivers live in usermode now?
p.s. The new textbox is still buggy.
Not in Vista.
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Cairo
I want my waffle sundae, give me my carbs!
A tantilizing way to phrase your answer.
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Karim
Trapped in a world he never made!
Tom Servo wrote:No idea. I'm sure there's some DRM in there, but I don't expect Total Recorder et al to break. At least I can't remember anything about an audio equivalent of PVP-OPM.
http://www.microsoft.com/whdc/device/stream/output_protect.mspx
They are calling "Protected Audio Path" a future initiative.
There's already "Secure Audio Path" in WMP, but given that half that stuff happens at the kernel level... I'm not sure how relevant it is to PUMA. -
Minh wrote:
But can you RECORD a playing DRM'ed content?LarryOsterman wrote: Minh wrote: Frankly, I'd be SHOCKED if DRM is not involved in the stack.
You can playback DRM'ed content using the new stack, that's certainly true
Unless it’s encrypted going to the output device you can just get a male-to-male 3.5 mm cable and connect the speaker out to the mic in. And if it is encrypted at some point it has to go to an electromagnet to be heard, so I assume with some hardware modifications you could record it there too.
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