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I am using an Aaeon AEC6820, embedded system, with USB 1.1
out (or the option of a pcmcia card (not bus)). I am trying to get spdif
out to send to an audio receiver...or to an M-Audio device to covert the signal
to spdif. I am using Linux 2.4.x.x and don't know if it supports
spdif. We are able to get analog out, and optical (with jitter) out.
The spdif conversion in the M-Audio device has popping, sometimes no sound,
etc. The chipset is supported...but I don't know if it will output
spdif...at least I don't know how to write the driver to do so.
The chipset is VT82C686B.
On a new XP system with USB 2 out, I can get spdif by changing the bit rate
to 24 instead of 16, and by cutting off one of the analog signals. This
seems to be a bandwidth problem to me.
1. We know drivers for the M-audio work
(we have analog).
2. We know they output digital optical, and
we know that their USB 1.1 outputs a signal that is converted in the M-Audio
(Audiophile USB) to analog.
3. By turning off one of the analog signals
in Windows XP, we are able to select 24 bit and SPDIF works.
What I am looking for is a mechanism to program to
cut off the M Audio analog driver for either analog in or analog out, cut ON the
24 bit rate sampling and voila...SPDIF should work. This seems pretty
simple to me, after I read your patch for M-Audio on the Linux
platform. They won't let me work on it because of their "secret"
information within. It is a relatively new method of using a computer
based music system for them...so they do not want to give out their
administrative password or username to allow me to go in and try to change the
drivers. They must do it, or the answer is no.
I want to provide them with as much information as
possible to be sure they do fix the problem. I cannot imagine that I am
the only person complaining of have a really nice sounding piano...with terrible
accompanying instruments. They have even admitted that they are getting this
request more and more frequently. They are just NOT motivated to do
anything. If I can give them the way to get this to work, they will use
it.
They are not interested in writing the patch to
make this work...I know it will work...this is what is so frustrating for me...I
can't get in to try it, they are not motivated to do it, yet I know it will
work.
Please let me know if you have any suggestions, and
thank you again for your reply.
Marion
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