Re: [Audacity-devel] Pitch and tempo shifters

[Anthony A. O. <Ant...@ep...>]

On Sat, 30 Nov 2002 12:54:05 +0000, Steve Harris wrote:

>On Fri, Nov 29, 2002 at 10:01:13 -0800, Dominic Mazzoni wrote:
>> Interested in helping to compare various pitch and tempo
>> changing algorithms?  I've compared a three free ones
>> here, and I'd like some feedback:
>> 
>>   http://spaghetticode.org/pitchtempotest/
>
>Just a quick note, PVOC implementations (like pitchscalehq) can be
>daramatically improved in sound quality (time smear - the anoying metalic
>sound) by increasing the window overlap. Unfortunatly this makes the cpu
>cost go up, so it isn't really practical for realtime, but (IIRC) its the
>method of choice for very high quality.
>
>I think WSOLA is a better performance/quality trandeoff though. It would
>pay you to also include some of the simple AM type pitch shifters, they
>are very simple and are better under some circumstances.

Most tools come with a choice of algorythems anyway. VocAlign has five and
Soundforge 19. Some fit better for speech, some don't.

I have yet to download that gigantic pack. Is it Flac'ed ?
Time to call a DSL buddy. Hmm.

 Tony