I'm mixing a 24 track song recorded on a dedicated hard disk recorder, digital piano recorded to analog wave files. No MIDI content. I'm getting intermittant noise on the stereo bus for the piano that sounds like a latency issue regardless of the buffer settings. I save and close, restart.....everything's fine for a few minutes, then the crunch comes back. I've frozen several tracks, makes no difference in the behavior. Interface is RME and drivers are current. Anyone else experienced this bug? My DAW is more than robust, it's not a horsepower issue. It's only on this particular bus and it's a piano driven song, driving me freaking nuts!  

"Crunch" sounds like clipping distortion. If you import that original audio file to a new project with no FX, does it stay clean? If so, what's on the track and bus for FX, and what do the levels look like throughout the chain including at the hardware bus meter in the console view? Audio buffering issues wouldn't affect only one track/bus, so something is likely going on with signal level or plugin processing.

No clipping anywhere, gain staging is correct, end of fx chain bus level tops out at -6dbFS on loudest part of performance. Average levels of actual tracks are -15dbFS. All fx are via the Pro Channel: Compressor, Console Emulator. I forgot to mention that if I try to engage the EQ on Pro Channel, Sonar tells me I have Sonitus EQ on that track and cannot engage the PC EQ. Funny, I can't find the Sonitus plugin in the fx bin. I'm beginning to suspect a corrupt .cwp file.

Hi. Do you have any plugins om your project? How are things routed (SONAR and RME)? Try to delete the bus, re - insert  bus. Route tracks to new bus.
Best of luck.

river
I'm getting intermittant noise on the stereo bus for the piano that sounds like a latency issue regardless of the buffer settings. I save and close, restart.....everything's fine for a few minutes, then the crunch comes back. 

I've experience something like that - and it turned out that a dry signal through a reverb on a bus cause it.
Saw to that reverb was all wet - and it went away.
so something to do with direct signal going two ways - and as you said latency thing it seemed.
 
Really weird thing, the crunch noises came exactly when L2 limiter reached threshold. For me it was breathing noises of vocalist so I started to edit them away, before I found the reason.

Itsd not a bug. Its something in your gain stage or signal chain. That's all. All you need to do is start taking away one thing at a time until it stops. If its a routing issue, then make sure there all correct.
 

fx chain bus level tops out at -6dbFS on loudest part of performance. Average levels of actual tracks are -15dbFS.

FYI: That doesn't matter and you can still have clipping. The track and the bus are not the end of your gain stages. You still have the master bus and main outs.
 
CJ

I've isolated it to the Pro Channel module on the bus I'm using for the piano. It's not clipping because if I disengage and then re engage the module, it goes away, then comes back after a few minutes and making several changes to the mix and stopping/starting playback. I've also inserted a plugin for identifying intersample overs on a track or bus, not even close to going over zero. Crunch was a bad metaphor on my part, it's crackle.

Found it. I had recorded a demo of this particular song in S6 PE last year. We recorded some new tracks and imported them into the project. X2 kept telling me I couldn't use the PC EQ because there was a Sonitus EQ on that bus, but it wasn't showing up in the fx bin. I opened the project in S6 and there was the Sonitus EQ in the piano bus. Disabled it there, went back to X2 and voila, crackle is gone. It was a latency issue related to the Sonitus plug in, and also a display glitch in X2.

For future reference, see the "Loading legacy projects" section near the bottom of http://www.cakewalk.com/D...Channel.2.html#1211774

scook, I tried the Control and click on the EQ module to disable the Sonitus EQ, it didn't work. Work around to the rescue, the essence of engineering.