But the rebuild doesn't fix the issue for 2 hours project - after 1h 03 minutes audio peaks are still straight lines.

Have you tried manually deleting all the .sfk files in the folder where the clips are stored? I have had trouble with the rebuild peaks command from the GUI at times. If you delete the .sfk files Vegas is forced to rebuild peaks for all clips.

If you still find a point on the timeline where waveforms aren't displayed properly, I'd try putting one of the clips from the end of the timeline on a new blank timeline and see if the audio is displayed properly. If it does so without rebuilding new peak files, then that points to the issue being related to a memory limit of some sort in reading the peak files. Which wouldn't surprise me. I think many of Vegas' issues are with accessing and releasing memory correctly.

I deleted all peak files, Vegas rebuild them with the same results - straight lines after the same point. I agree with you that it is most likely memory issue and it is very strange for 64 bit program and should be fixed.

I don't quite understand your description.

Are these "straight lines" horizontal or vertical?

Horizontal straight lines instead of symmetric waves.

I had this issue with audio files that were on my USB2 drive. Exiting vegas & reopening the project in a new instance solved the issue for me.

I still see this problem with the last 726 build in Vegas Pro 12 - does anybody is aware of how it can be fixed? The first 50-65 minutes of the project is OK but after that peaks are OK only at the very beginning of each event. Peaks rebuild and deleting peak files and rebuild doesn't make difference. My system is 64 bit Windows 7.

Well ... is the problem with just the display of the audio, or is the sound gone on playback?

I'll assume the later ... what if you split the file after each still frame? You would not have to move anything, just put a split on the timeline. It should play thru the split as if it was not there (assuming you do not move anything)

Sound is OK during play back and after final sound rendering for Architect 6.0 Blu-ray project. Even for 2+ hours projects. What I noticed, that if I zoom timeline very high - when from frame to frame marker jumps for about 2 millimeters on my 24 inch monitor (it's about inch for 12 frames - half of a second) I see peak file correctly, but If zoom out ones - I see straight line instead of peak wave.

Also I noticed that for each event with broken peak wave image the first 70 frames have correct pick image - exactly first 70 frames! What's the magic value!

To be clear, it is only with the MTS media you mentioned, or does it happen with any audio media?

Peter

I noticed it only with Panasonic HDC-Z10000P mts files with 5.1 audio so far - didn't try other sources. It appears only on long projects - about after 1 hour point in timeline. When I create a short project - 17 minutes from 70 minutes project - all peak images are OK even for events with are behind 51 minutes point in big project and have broken peak images on audio track. There was no this problem with Vegas Pro 11 and Sony HDR-TD10 mts files. I just opened 2+ hours Vegas Pro 11 project with Sony HDR-TD10 mts files by Vegas Pro 12 - all peaks show up well - Sony doesn't rebuild peaks after opening.

Has anyone solved this? I'm working in Vegas 12 and have several projects that have started to behave this way. MTS files from my Panasonic appear with no waveform (just a horizontal straight line), but MOV files show audio always. If zoom in (up arrow key) I can see the wavform, but I have to be pretty far in. As soon as I zoom out a bit the waveform disappears. Sometimes I briefly see flashing "Peaks Temporarily Unavailable" message, but that's like 20% of the time.

Any news about this issue?
I do also long 3D project, and with V11 this problem never happened.
With V12 if i zoom with the mouse while playing, peaks disappear, only show a message: "peaks temporarly unavailable". As i stop playing, peaks will be visible, and i can zoom in as much as i can. Why don't load while playing? I have plenty of RAM!

hello guys!i know its a very late reply but i manage to fix mine... the issue here is whenever you put a video file to the time line the audio waves are in straight line well try to right click that particular audio file in the timeline then properties after that i assume that there is a check in the "loop" so change the check to "normalize" then click okay that should do the work !!! Good Luck peeps i hope it helps this fix mine- Vegas pro 16

hello guys!i know its a very late reply but i manage to fix mine... the issue here is whenever you put a video file to the time line the audio waves are in straight line well try to right click that particular audio file in the timeline then properties after that i assume that there is a check in the "loop" so change the check to "normalize" then click okay that should do the work !!! Good Luck peeps i hope it helps this fix mine- Vegas pro 16

That fixed my issue! I've been dealing with this for days! Thank you so much!