flushing hardware buffers....repeating/stuck sounds with MOTU 828mkII

JMacSTL wrote on 2/3/2005, 6:53 PM

After reading the comments about the RME hardware and Vegas 5.0, I realized that I have had this issue with a brand new MOTU 828mkII and Vegas 5.0d. But it only occurs when Soundforge 7.0 and Vegas are both open applications. When playing a piece of audio in Soundforge, and you hit STOP, it will cause a repeating sound to occur at the point at which you stopped/paused. If you stop in silence, it makes no sound at all, of course. I'm wondering if this could be the same issue as the RME device has had with Vegas, and whether the RME's problems occurred when Vegas was the ONLY app. open, or if having Soundforge open also caused it..

This thread from a SONY rep. >>>"....Actually the RME driver does not flush its hardware buffers when Vegas closes the driver. We did try to address this, and I have been unable to reproduce this in Vegas 5, but the bug is in the RME drivers, though they will tell you otherwise. There is nothing in the ASIO spec that requires the host to stream silence buffers to the hardware prior to closing the driver down. This is the ONLY hardware that requires this behavior....>>> makes comments about the RME hardware. I

I've tried using the MOTU FIREWIRE driver, even tho I realize Vegas doesn't recognize the ASIO or ASIO2 driver, and I've tried the other Windows drivers, but I don't seem to be able to make heads or tails out of which combinations causes this to occur. It's still unpredictable.

Comments, anybody? Especially if anybody is using a MOTU box with Vegas, I"d appreciate hearing from you.

jmm in STL

Comments

pwppch wrote on 2/3/2005, 7:27 PM

To be clear, Vegas _does_ support ASIO. I take it you meant Forge does not support ASIO.

Could you walk me through an example of how you get this to occur.

I assume that Vegas is set up to use the ASIO drivers and Forge is set to use the Wave Drivers.

Do you have Close Audio ports enabled in Vegas' prefs?

Peter

JMacSTL wrote on 2/3/2005, 8:42 PM

Thx for the quick reply. I admire you guys for staying on top of the forums.

When I commented about the ASIO drivers, I guess I was referring to the fact that I was told that Vegas won't recognize SMPTE time code from the 828mkII since the MOTU box uses the ASIO driver to get SMPTE to the host computer. I"m now using a third party SMPTE to MTC converter for lock to picture applications.

But here's how the problem occurs

I'll have Vegas 5.0d open, and right click a cue and open it in SoundForge. (Vegas is no longer playing..I've hit stop). Then I"ll play the clip, and hit the spacebar to stop or pause the playback..at which point it starts this quick repetitive "looping" sound, as if it's looping a few frames' worth of audio. If I close the files in SF, it still is making this sound. If I exit SF it still makes the sound. When I return to Vegas, and hit play anywhere, even on silence, the "looping" sound stops and everything seems fine, until I return to SF. I realize now that SF doesn't support the ASIO driver. This has occurred when Vegas is using the ASIO driver (what I presume is the selection called "MOTU FIREWIRE AUDIO") and also when Vegas is using the traditional driver. But....today, when I fired the whole thing up, with the same configuration as yesterday, it never once made this sound when SF was playing/pausing/stopping. Wierd. My old system that I just moved from was using the same two pieces of software but with an ECHO GINA card. Never had the issue before.

The 2nd thing I did after trying both drivers (ASIO and the traditional WAVE drivers) was to click the box in setup for Close Audio ports. This made a difference immediately, but the next time I booted the computer, even tho the Close Audio ports was still selected, it made the sound again.

jmm/STL