volume envelopes increase level

johnnystunt wrote on 10/1/2003, 8:52 AM
when I place a volume envelope on any audio track...simply by selecting the track and hitting "v" on the keyboard, the volume of that track is increased (slightly I might add - like half a db - but an increase none the less)

I am forced to compensate each time I add a volume envelope...either by lowering the envelope or the fader of that particular track.

the envelope looks to be set to 0db, but obviously, something is not right.

is there a setting I am missing or something? any insights would be appreciated.

Comments

Ben  wrote on 10/2/2003, 3:23 PM
I can't repro this. Be sure your envelope <is> definitely set at 0 dB.

Ben
CDM wrote on 10/2/2003, 4:17 PM
I've never experienced this, either. Can you give us more details about the project?
johnnystunt wrote on 10/2/2003, 5:07 PM
no probs...some details...

any project, and any file...say an mp3 of any audio...is playing in a track (with no volume envelope on it), the peak output volume of the track is say -9db on the master fader. as soon as I add a volume envelope to the track, the volume of the track is increased to about -7db...so I have to lower the volume envelope (which is defaulting to 0db) a couple of db's to compensate. this happens on every track in every project, no matter the format of the audio piece in question.

once the volume envelope is there...it doesn't matter if I make it visible or not (pressing "v") the volume output is the same. the only way to bring it back down is to "undo" to the point where the volume envelope is removed.

I am using windows xp home, vegas 4.0d

if i have missed any pertinant details that may help out, please let me know.

many thanks...
pwppch wrote on 10/3/2003, 12:08 AM
I just tried this and cannot reproduce.

Simpel test:

- Loaded a sine wave file generate in Forge with a -12db peak.
- Played and the master bus indicated a -12db steady signal.
- hit the "V" on the keyboard.
- Hit play. The master bus indicated a - 12dB steady signal.
- Change the volume envelope to a + 4dB. The out put was -8 db.
- Change the volume envelope to a -4 dB. The output was -16 db

I tested with a audio file ripped from a CD that had a releatively steady dynamic range with consistent peaks. No change when I added or removed the volume envelope.

I then rendered and compared the original to the rendered version in Sound Forge. No change when I added the volume envelope.

I then converted the same file to an MP3 @ 128 kbs. No changes.

It could be the media, as the mp3 test I did showed a change in the overall gain and dynamic range with no envelope.

I don't believe Vegas is doing anything - at least I can see or hear anything.

Peter

johnnystunt wrote on 10/3/2003, 10:03 AM
hi peter...I recorded a sine wave in vegas 1, 2, 3 and 4 and then added volume envelopes...none of them added extra volume except for Vegas 4.

I am not sure what to do.

Is there a setting somewhere that the default settings for the volume envelope can be changed at all?

If not, obviously all is not lost, I can just keep adjusting the volume envelope in V4d.
pwppch wrote on 10/3/2003, 6:54 PM
Could you email me a project and the sine wave file you did this with as well as a rendered version of the sine wave that has the change?

phaller@sonypictures.com

Thanks
Peter
pwppch wrote on 10/5/2003, 11:48 AM
I have reproduced this. It manifests itself when the pan model is not the default - i.e. .constant power, --3dB, or -6-dB settings are used.

It appears that the addition of a volume envelope some how circumvents the pan law.

Looking into it.

Peter