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Old August 16th, 2010, 12:54 PM   #1
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Audio behaving very strange

when I apply volume envelope to turn music audio volume down suddenly it becomes like test tone of high frequency and on volume meter is shown like 350+ db. what is going on?
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Old August 16th, 2010, 01:17 PM   #2
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I've never seen an audio envelope do anything like that. Can you give a step by step on how we could try to reproduce that?
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Old August 16th, 2010, 01:27 PM   #3
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I've got a very vague recollection of this being reported on the Sony Vegas forum (which is unfortunately down right now) some time ago.
Something to do with a zero crossing point as I recall.
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Old August 16th, 2010, 01:28 PM   #4
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I place music audio file below track with video footage and when I add point in volume line to lower music down it goes to beep of extremal volume AS SOON AS is pases that added point on volume line ( see audio Master reading).
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Audio behaving very strange-vegasaudio1.jpg   Audio behaving very strange-vegasaudio2.jpg  

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Old August 16th, 2010, 01:53 PM   #5
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Quote:
Originally Posted by Mike Kujbida View Post
the Sony Vegas forum (which is unfortunately down right now)
The forum just opened for me...
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Old August 16th, 2010, 04:49 PM   #6
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Loud POP sound on 2 envelope points at 90 degrees is the relevant thread on the Sony Vegas forum.

Sony's official response:
You are experiencing this 'popping' noise because the audio envelope is being used like a cut, and cutting on a non-zero point will create a 'pop' noise in the audio. We have been able to reproduce this in all versions of Vegas, as well as in Sound Forge. Basically, it is a characteristic of audio editing. If you make a cut or drastically drop volume on a non-zero crossing point, you will hear a resulting 'pop'.
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Old August 16th, 2010, 05:01 PM   #7
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WHAT!
I am not "cutting" anything I am lowering SLIGHTLY volume of background music to hear narration; Interesting - when I reopen that project and reload that music audio file and do nothing, audio will become beep in very same spot like in last project. Is this like "memory effect"?
I had to move the music audio file to different audio track to play it normal.
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Old August 16th, 2010, 06:17 PM   #8
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Marius, Sony didn't say cutting, they said ...like a cut... which is a world of difference.

This was reported in Pro 9.0a and hasn't been a issue since.
What version are you using?
Have you tried moving the second point a tiny bit to the left or right to see if this cures it?
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Old August 17th, 2010, 12:40 PM   #9
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What are the media properties of the audio file that is having the problems?
From the attached screenshot, what you have layed out should behave normally.
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Old August 17th, 2010, 12:55 PM   #10
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It is regular mp3 file;
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