• VEGAS Pro

  Audio question

  Posted by Stewart Bourke on May 9, 2011 at 9:34 am

  VP10c.

  I have a question on general on audio.

  I have been rendering some .mov/QT files for display on an apple. I have been rendering at 3MBPS and 5MPBS

  I have noticed that the a lot of teh time the audio sounds slightly ‘phased’ or flanged. The effect is not very noticable – but just enough to be annoying..

  It got me to thinking as to whether there was anything in the 44,100 / 48,000 difference.

  For example, I have a project which contains a number of audio clips – some at 44,100 and some at 48,000. In my render settings the audio is set to 48,000 by default, and I leave it as is…

  Does Vegas do some sort of sampling to convert the audio all up to 48,000 – is this something likely to impact on audio quality etc?

  I have been hunting around looking for a good description of how vegas processes audio, but nothing really came to light…

  Thanks for any info.

  Scott Francis replied 15 years, 2 months ago 3 Members · 2 Replies
• 2 Replies

• 

  John Rofrano

  May 9, 2011 at 10:44 am

  [Stewart Bourke] “Does Vegas do some sort of sampling to convert the audio all up to 48,000 – is this something likely to impact on audio quality etc?”

  Yes it does, but having 44,100 audio in your project will not cause any phase shifting effect. Is your audio of marginal quality? (e.g., MP3 files, etc.) Sometimes audio that is marginal will sound worse when re-rendered because it was right on the edge of sounding good to begin with. Also make sure your phase is correct on your events. If you do things like swap the left and right channels on some events in Vegas it will cause the audio to go out of phase. Finally, make sure that your QuikTime template is using a high enough bit-rate for the audio encoding. Very low audio bit rates will introduce artifacts that sound like phase shifting.

  ~jr

  http://www.johnrofrano.com
  http://www.vasst.com
• 

  Scott Francis

  May 9, 2011 at 12:02 pm

  I had similar issues in MOV….try different “audio formats” under the audio tab in customizing the way you render. This helped me in the past..

  Scott Francis
  Mind’s Eye Audio/Video Productions

Reply to this Discussion! Login or Sign Up