Thanks for the suggestion/help... I also wonder if it was somehow an odd thing.

Not embedded projects.

If I start a new project, add a .wav file then add Track EQ to the event, not the track, select the event, turn on the loop, hit play, add an increase to one of the frequency bands and then just let it loop, before long the event is screeching like a poltergeist and very loud.

Ok, in writing, I had a thought, I said a .wav so I decided to try a mp3 file different source, no problem, now I just render the problem event as a mp3 and put on the time line no problem with the new file, still have a problem with the audio event. The attribute of the file is 48K Hz with 32 bit (IEEE Float).

The file is a dialogue replacement dub that I had used Adobe Audition to fit the timing to the original video clip and when I save it, it saved to the above attributes. So to double check, and just make sure that it was the wav file format, I added the original video clip (.MTS) to the time line and added the same Track EQ to the audio event with similar adjustments and well, no problems.

Not sure what to think.

My fist thought was that I perhaps had some setting change by mistake, but now it appears to be file type specific coming from Audition.

Any guess as to why a wav file with 32 bit float cause problems like this. I guess I can change all of the clips to mp3's, but what a pain.

Audio is not my strong point, but I notice under project properties, the highest setting is 24bit. Could it be that vegas cannot handle the 32bit correctly? Have you tried a 24bit wav file?

In Vegas 10 I get the same issue with a 32-bit WAV file: using event FX causes it to continuously add to the sound until distorted completely. I downloaded a 32-bit WAV from here: http://www.kozco.com/tech/soundtests.html

I did some tests & if I render one of the imported 32-bit WAV's back to a new 32-bit WAV from Vegas & reimport, it does NOT have the same glitch.

So it appears it only happens to WAV's that aren't rendered out from Vegas.

In Vegas 10 I get the same issue with a 32-bit WAV file: using event FX causes it to continuously add to the sound until distorted completely. I downloaded a 32-bit WAV from here: http://www.kozco.com/tech/soundtests.html

Which one?

I get no problem with organfinale in VP10, 13 or 15 with Track EQ on the event set to "[Sys] Fletcher-Munson curve (low volume compensation)" and playback looping over the event.

@KelvinWorks Could you please share a sample WAV file?

I checked and organfinale is one the caused the issue for me.

Tried the same FX & preset and by the 3rd loop it started clipping the audio channel on the track & being really distorted.

I don't even need to use Vegas to loop the event, if I start playing at a certain point & keep clicking back to that point while in playback it keeps adding the FX. Like if it's not reading the audio file but a new rendered file & applies the FX again.

Every time I stop playback & take focus away from Vegas it eliminates the effect & starts over. Once I start playing again it begins again.

Windows 10 (all updated), Vegas 10 (whatever the last one was), AMD 7850 w/17.9.1 drivers, I have speakers & Oculus Rift as my audio devices.

Thanks Nick and Friar for help and testing.

I would provide a sample WAV but not sure about how to share it. The forum upload will only allow mp3 attachments.

I still had problems even with the preset "Fletcher-Munson curve" with my file. Although I have to say Nick, that I didn't see my problem with the organfinale.wav either. I noticed that it is 44k Hz instead of 48k. Small difference but perhaps enough that my system does not take issues with it.

Using Vegas I did a re-render of the file from Audition, and selected the same settings from the wav selection of the 48k Hz and 32 bit float, and have the same problem with the Vegas rendered file as the Audition file, i.e. around the third loop being very distorted and clipping. I also found too like you said Friar, that if I just minimize Vegas window and then go back the file is momentarily normal until about the third loop.

Again using Vegas to re-render the file from Audition only this time selected 16 bit WAV, and this render setting doesn't have any problems using the same FX (using Track EQ with increasing the 3rd frequency band by a little bit).

I also used Audition to open the 32bit float file, then "Save As" this time with a setting of 24 bit fixed integer and put this file on the timeline and it plays with the FX just fine.

Also did another save as with Audition this time with 44k Hz 32 bit float, no problems with the FX.

I also again tried the FX on the track vs the event and it plays the 32 bit float file/s with the FX without any problems either.

So it appears that 48k Hz 32 bit float WAV files at the event level FX's are not compatible. Anyway not with my system. Very odd.

I would provide a sample WAV but not sure about how to share it. The forum upload will only allow mp3 attachments.

mega.nz, wetransfer, mediafire, Google Drive, Dropbox, OneDrive etc..

Anyway, no need as I've established a procedure that's repeatable enough to report this (and won't blow your speakers). Unfortunately when I submit a Support Request it keeps failing, but I will keep trying to submit the below and will post the ticket number here if it succeeds. Edit: [Ticket#2017100417000269]

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Bug Report: An audio FX incorrectly has a cumulative effect on a 32 Bit (IEEE Float) WAV file when it is looped on the timeline and the project sample rate matches the media's sample rate. Here is a test procedure:

1. Put any stereo audio file on the timeline.
2. Render a few seconds as Wave (Microsoft) > 48.000 Hz, 32 Bit (IEEE Float), Stereo, PCM (float)
3. Put the rendered file back on the timeline
4. Set Project Properties > Audio > Sample rate (Hz) to 48,000
5. Add the Volume FX with a negative value such as -0.800
6. Double-click the event on the timeline to set the loop region over it
7. Enable loop playback (button at left of timeline toolbar)
8. Play the timeline. Audio will get gradually quieter with each loop and other audio artifacts may appear.

The problem happens with other sample rates if the project sample rate is matched to the sample rate of the audio file (tested with 44,100 and 96,000Hz).

The problem occurs with other FX such as Track EQ.

I've verified the problem in VP10, 13, 14 & 15.

This is discussed on the forum at https://www.vegascreativesoftware.info/us/forum/audio-fx-multiplying-and-distorting-destroying-waveform-event-clip--108894/

Thanks Nick

I received an email from Support that included this:

​This is now a known issue which will be resolved in a future application update.

I also am suffering from this - trying to add a simple 3db volume boost via audio fx - and each and every time you press space bar to listen to the effect it adds another 3db at each pass "on top" until total distortion is acheived.

Had to cancel off the audio fx to get rid. Hope your team can find the fix.

(Otherwise enjoying Vegas Pro 15)

regards

AL

I have the same problem on VP15 while using the volume effect on an .aac audio file and then listening to it a few times. The problem does not exist for .mp3 files for exemple.

Regards,

NR