Re: HDSP 9652: Input channel corruption

[Mark Knecht <markknecht@comcast.net>]

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Nick,
   Following on from my other response to you, I do not see the problem
you are speaking of. (Again, assuming I understand what you are saying
the problem is.) The attacked .png file (I hope small enough to be
accepted by the reflector - it's about 27K) shows the audio on channels
8, 10, 12 & 14. This assumes your channel numbering of 0-23 and is all
even (left ) channels on the ADAT 2 input to the HDSP 9652.

   I ran a quick test this evening by creating a session in Pro Tools
where I have a single stereo audio track. I then routed the track (via
sends) to the 4 ADAT stereo output pairs:

Pro Tools	HDSP 9652 in

ADAT 1-2	ADAT-2 8,9
ADAT 3-4	ADAT-2 10,11
ADAT 5-6	ADAT-2 12,13
ADAT 7-8	ADAT-2 14,15

   I recorded the four incoming stereo pairs using Audacity and then
deleted the 9,11,13 & 15 inputs from the display for this picture. 

   As you can see from this display, there is not obvious different
between the 4 channels. Channel 8 appears to be identical to channels
10, 12 & 14. I think that if there was the ordering problem you were
seeing it should be evident in this photo, but I'm not seeing it.

   (This was true for 9,11,13 & 15 also...)

   If I've misunderstood the problem you are debugging, let me know and
I'll set up another test. This only too 5 minutes to do, so I'm happy
(and interested!) in helping you debug this, especially if it does turn
out to be a global problem with the card.

   BTW - what firmware does your HDSP 9652 have? I suppose that a
different revision of firmware could certainly account for differences.

Cheers,
Mark

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