Subject: Re: USB users?
To: Lennart Augustsson <>
From: Andrew Reilly <>
List: current-users
Date: 09/25/1998 07:49:13
On Thu, Sep 24, 1998 at 07:44:04PM +0200, Lennart Augustsson wrote:
> > I just bought a USB card to plop into one of my Alphas, and hope to get
> > from Altec USB speakers and a USB camera, soon... drivers?  :-)
> The USB audio driver is mostly finished, I just need to find some
> spare time...

Ah, someone who knows!  I have a question:

I know that USB has about 12MB/s bandwidth, and some sort of
isochronous protocol, specifically to support such things, but
what is the real bandwidth available for (eg) audio data.  Is it
isochronous on a sample-by-sample basis, or is there a packet
protocol in there (that must introduce a modicum of latency)?

Is it reasonable to configure a USB sound system for more than
two channels?  Would DVD-style five-or-six channels work?  Would
eight be possible?

>    -- Lennart