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Old 2nd March 2012, 02:26 AM   #1
spot is offline spot  Australia
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Default Multichannel usb -> i2S

Hi,
Are there any solutions for a 5.1 channel USB -> I2S converter that isn't $100's+?
If not are there any PC drivers that can connect to say 3 stereo USB -> I2S devices and appear as a single 5.1 channel device?
Edit - Windows XP

Last edited by spot; 2nd March 2012 at 08:17 AM.
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Old 2nd March 2012, 02:51 AM   #2
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Quote:
Originally Posted by spot View Post
Are there any solutions for a 5.1 channel USB -> I2S converter that isn't $100's+?
Not that I know of.

Quote:
Originally Posted by spot View Post
If not are there any PC drivers that can connect to say 3 stereo USB -> I2S devices and appear as a single 5.1 channel device?
If you use OSX you can aggregate multiple sound interface devices. The Problem you've not considered is the clock synch between the 3 stereo usb->i2s devices will be problematic.

There is no free lunch in multichannel usb audio.
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Old 2nd March 2012, 06:12 AM   #3
phofman is offline phofman  Czech Republic
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All adaptive USB cards run synchronously since they are timed from clock in the PC. If I really wanted to make sure, I would use an add-on PCI USB controller with 4 outputs which has a single chip (mostly VIA VT6212) and a single crystal. This way I would know all the four usb ports share a single clock.

4 cards hooked to these ports can be merged in software to form a single virtual device - in linux, osx. There may be even some tools in windows, no experience.

Of course using a single multichannel device is much more convenient
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Old 2nd March 2012, 08:24 AM   #4
spot is offline spot  Australia
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Quote:
Originally Posted by phofman View Post
... If I really wanted to make sure, I would use an add-on PCI USB controller with 4 outputs which has a single chip (mostly VIA VT6212) and a single crystal. This way I would know all the four usb ports share a single clock...
Clever idea. Just need a windows driver
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Old 6th March 2012, 12:14 AM   #5
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Bandwidth of USB 1.1 is not enough for surround uncompressed audio.
You need to go with a standard lossy compression like DolbyDigital or DTS.
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Old 6th March 2012, 06:05 AM   #6
phofman is offline phofman  Czech Republic
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Quote:
Originally Posted by SoNic_real_one View Post
Bandwidth of USB 1.1 is not enough for surround uncompressed audio.
You need to go with a standard lossy compression like DolbyDigital or DTS.
I have a dirt cheap 5.1 USB soundcard and it works fine at 5.1 48/16.

Last edited by phofman; 6th March 2012 at 06:09 AM.
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