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Audio problem driving me nuts!
Hi All,
I’m working with Vegas Pro9e.
HP Pavilion Laptop dv8Quad – i7 840Q – 8Gb RAM – 2 x 500Gb HDD.
Video source material: HD off a Sony EX1r – 1920/1080 30p
Audio source material: 48k/16bit stereo.I have an issue that I just cannot solve:
When I play back any stereo track (audio only), and an unusually loud noise (like a door slamming) occurs on one track, the volume of all the tracks (including the one with the loud noise) appears to “clamp down”. It is as though an automated gain control is in effect. It’s not like a limiter that simply reduces the volume for a short period and then lifts it again. This appears to lower the volume from that moment on.
If I then stop and begin playback from beyond the “loud noise”, the levels are just fine. But the moment another loud event happens, everything clamps down again and stays that way until I stop and re-start playback. It only appears to reduce the gain by one or two db, but it is distinctly noticeable.
I have disabled all the track effects that are automatically loaded when you bring an independent audio event onto the timeline and have checked to make sure that there are no audio effects being added to the master gain control.
I am lost on this one.
Has anyone ever experienced this issue before? Please help. Any suggestions will be greatly appreciated.
Cheers,Bruce
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5 Replies
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Does it do this in Windows media player? just so we know if it’s Vegas doing it.
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Or when you render the audio, does it sound the same way?
Steve Rhoden
(Cow Leader)
Creative Arts Director and Film Maker.
Project Samples at:
http://www.youtube.com/hentys -
Do you have any effects enabled in your PC audio drivers? My Sony laptop has the “Big Room” effect on by default – I guess it makes the one-inch speakers sound bigger? Make a DVD of the offending noises and see if it renders that way or if it’s just your PC. Also, if this is a laptop, how are you listening to the sound? Active noise-reduction headphones (ANR) will also do this as all the available power is used for the loud sounds and it takes a few milliseconds for the ANR circuitry to recover.
Steve Mann
MannMade Digital Video
http://www.mmdv.com -
Thanks for your replies gentlemen. I will do as you suggest and check the results.
Really appreciate your input – this forum is an incredibly valuable resource.
Thanks again,Bruce
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Stephen! What a guy. I checked my computer settings and there was a “loudness control” checked that I hadn’t noticed before. Unchecked that as well as anything else I could find that might interfere and voila…problem solved!
I hadn’t noticed this problem before. But because I was working on some room tone, which was low level background hum, the issue stood out.
I can’t thank you guys enough.
Cheers,Bruce
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