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 >
