naturerecordists
[Top] [All Lists]

Re: Stretching Sounds

Subject: Re: Stretching Sounds
From: Doug Von Gausig <>
Date: Thu, 02 Oct 2003 10:50:12 -0700
At 05:17 PM 10/1/2003, Syd Curtis wrote:
>Doug,
>
>         Easy to slow down the recordings (or speed up) with computer - or an
>'antique' Uher 4-speed reel to reel.  But halve the speed and the pitch
>drops an octave.  Can you slow the recording and retain the same pitch?  Or
>does changing the pitch also help you to a better understanding of the
>sounds?

CoolEdit allows you to slow the sound down without changing pitch ("Time 
Stretch"), change pitch without changing tempo (Pitch Shift), or "Resample" 
to change pitch and tempo at the same time (same as you would using 7.5ips 
instead of 15ips on a reel-to-reel). Resampling give the best results - not 
so much interpolation on the part of the software.

I've posted examples at http://www.naturesongs.com/recordists/nrfiles.html. 
These are all examples of the same short segment of  Scarlet-rumped 
Cacique's song. The first is the normal sound, the second is resampled to 
1/3 speed, the third is time-stretched to 3X the time, and the fourth is 
pitch shifted to 1/3 pitch.

Doug

Doug Von Gausig
Clarkdale, Arizona, USA
Moderator
Nature Recordists e-mail group
http://groups.yahoo.com/group/naturerecordists



[Non-text portions of this message have been removed]



________________________________________________________________________
________________________________________________________________________

<Prev in Thread] Current Thread [Next in Thread>
  • Re: Stretching Sounds, Doug Von Gausig <=
Admin

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the naturerecordists mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU