Subject: Re: [LAU] decoding into a multiple channel converter (was:surround sound with stereo usb DACs?)

From: Bearcat M. <hometheater@...> · Date: Saturday, January 10, 2009 - 7:27 am

On Saturday 10 January 2009 00:16:04 Justin Smith wrote:
> I am under the impression that with multiple sound cards you have the

quoted text> issue of clock drift, the audio channels would eventually go out of

> sync, and this would get worse and worse over time. When only one

> sound card is being used, the application can sync the video playback

> to the audio device, since video speed is not as evident a distortion.

> With multiple audio devices with separate clocks, you would most

> likely get annoying phasing and comb filter artifacts, if not a

> distinct echo. There are firewire cards that can share a clock in

> order to eliminate this problem, but I have not heard of USB cards

> that share a clock pulse.
Ah, i had not thought of that and it makes sense. Thank you. Would it be

possible to have the Linux box do the decoding and send it to a hdmi D/A (if

such a thing existed, i only know of HT processors) or a RME multi-channel

converter?   
--

Bearcat M. Şandor

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