2 Oct
2003
2 Oct
'03
1:30 p.m.
uh - I'm pretty sure I wasn't getting that glitching noise when I was
changing frequencies - although the first time I ran hdspconf, I changed the
spdif button to professional, or something - I changed all around in that
part of the window, and at some point, the last 8 channels on my board
showed up with pegged meters - no audible noise, just pegged meters. I had
to reboot everything to get them to go away and be able to hear sound again
the glitchy noise you describe actually sounds like it's to be expected when
changing freqs - it's not something I would worry about in my studio - after
all, it's not something people do, say, in the middle of a song *laugh* -
although the part about websites changing it, that's a little screwy
Hi all,
Small update. In my case the 'weird glitchy noise' appears to be the
HDSP 9652 changing sample frequencies. My system is set up with the 9652
as the Master clock device and a frequency of 44.1K. It's ADAT1 output
and input go to an external A/D/D/A that runs at 48K unless it receives
a different sync frequency. Normally everything syncs up and runs at
44.1K in this configuration.
The first thing I found that seems like a bug is that when I change
the sample frequency of the card using hdspconf from 44K to 48K I get
the same ugly noise. It seems to me that something should be done in the
driver so that when clock frequency is change the driver would ensure
that these noises do not happen.
The second thing I noted was that when I browse these web pages that
cause the noise problems, the ADAT1 input sync/lock indicator in
hdspconf changes from sync to lock and back to sync. I'm guessing that
something is changing the card's frequency from 44K to 48K. (Flash
possibly? Or something weird in the driver?)
The third thing I noted, which seems pretty weird, is that if I set
the card up to be master but run at 48K, then when I browse these web
pages the noise happens and something changes the card's base rate back
to 44.1K permanently. That seems quite wrong. I really don't want
anything messing with my frequency settings on a permanent basis, but
something is.
I'm hoping that someone else running a card in the HDSP line can pull
up hdspconf and see if any of this happens with your system. Possibly
you won't see it unless you have a similar, external bi-direction
A/D/D/A that wants to run at 48K, but maybe you'll spot somethign
happening on the sync indicator that's similar to what I'm seeing.
Thanks,
Mark