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Time-stretching with precision

 
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Tristan



Joined: 13 Oct 2007
Posts: 30
Location: location, location

PostPosted: Fri Feb 22, 2008 3:26 pm    Post subject: Time-stretching with precision Reply with quote

I was wondering if anyone could recommend a method for precise time-stretching.

Often I need to edit loops to last a certain number of milliseconds. Problem is, "Change Pitch and Speed" under Amadeus Pro's Effects menu works in increments. You can type in a target length, but the actual length that results from the operation will not be what you requested. It's close but not exact.

Might this be fixable, Martin?

Meanwhile, I'd be grateful if anyone has a suggestion for a workaround.

Cheers,

Tristan
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Martin Hairer
Site Admin


Joined: 08 Nov 2006
Posts: 1612

PostPosted: Fri Feb 22, 2008 4:50 pm    Post subject: Time-stretching with precision Reply with quote

Quote:
Might this be fixable, Martin?

For version 1.3, I plan to replace the "SoundTouch" algorithm which
Amadeus Pro is using at the moment by the one that Apple integrated
into MacOS X. I have done some testing and it seems to give
consistently better results. It is likely that this would also fixe
the problem that you encountered. Cheers,

Martin

HairerSoft
http://www.hairersoft.com/


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Tristan



Joined: 13 Oct 2007
Posts: 30
Location: location, location

PostPosted: Fri Feb 22, 2008 9:30 pm    Post subject: Reply with quote

Thanks, Martin. That's good news; I hope Apple's algorithm does the trick!

In the meantime, anyone know of an Intel-compatible audio unit that lets you time stretch to a given duration?

- Tristan
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Bryan Mumford



Joined: 24 Apr 2007
Posts: 36

PostPosted: Fri Feb 22, 2008 10:04 pm    Post subject: Time-stretching with precision Reply with quote

Logic Pro.

Amazing Slow Downer.




Quote:
I was wondering if anyone could recommend a method for precise
time-stretching.

Often I need to edit loops to last a certain number of milliseconds.
Problem is, "Change Pitch and Speed" under Amadeus Pro's Effects
menu works in increments. You can type in a target length, but the
actual length that results from the operation will not be what you
requested. It's close but not exact.

Might this be fixable, Martin?

Meanwhile, I'd be grateful if anyone has a suggestion for a workaround.


--

Bryan Mumford
http://www.bmumford.com
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Martin Hairer
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Joined: 08 Nov 2006
Posts: 1612

PostPosted: Tue Mar 04, 2008 9:10 pm    Post subject: Time-stretching with precision Reply with quote

Hi Tristan, the version at <http://www.hairersoft.com/Downloads/AmadeusPro.zip
Quote:
now implements Apple's time-stretching algorithm. It is slower than
SoundTouch, but the gain in quality more than makes up for it in my
opinion Wink It is also now extremely precise as far as the length of
the resulting sound is concerned. Regards,

Martin

HairerSoft
http://www.hairersoft.com/


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