[Audacity-devel] Fwd: [Audacity-quality] Fwd: [Mixxx-devel] Using librubberband for tempo and pitch stretching.

[Vaughan J. <va...@au...>]

Hi. I didn't get any response on this on -quality, but do any devs know 
about librubberband?

- V


-------- Original Message --------
Subject: [Audacity-quality] Fwd: [Mixxx-devel] Using librubberband for 
tempo and pitch stretching.
Date: Sun, 16 Jun 2013 21:52:22 -0700
From: Vaughan Johnson <va...@au...>
Reply-To: audacity-quality <aud...@li...>
To: audacity-quality <aud...@li...>

Anybody else on audacity-quality monitoring Mixxx-devel? Any feedback
here about librubberband vs libsoundtouch?

- Vaughan


-------- Original Message --------
Subject: 	[Mixxx-devel] Using librubberband for tempo and pitch stretching.
Date: 	Sun, 16 Jun 2013 14:00:42 -0400
From: 	RJ Ryan <rr...@mi...>
To: 	Too Many DJs <mix...@li...>



Hi all,

In the features_key branch I have replaced libsoundtouch with
librubberband for doing pitch and tempo shifting. The results have been
great sofar. Just using as a replacement for keylock it is much better
at not stuttering when you do extreme time-stretches (it doesn't have
that stuttering effect that soundtouch gets around -60 to -80%). The
pitch shifting quality is also quite good.

Please give it a try. The latest available builds of features_key for
Windows and Mac are here:
http://builds.mixxx.org/builds/experimental-features_key/

If you want to test out pitch shifting you will need to create a slider
in the skin attached to the 'pitch' control. I just take [Channel2],rate
and change that to [Channel1],pitch so the deck 2 rate control controls
deck 1 pitch.

If you would like to build features_key you will need to install
librubberband (I used 1.8.1). You can see how I did it on the build
server for Windows and Mac here:

http://mixxx.org/wiki/doku.php/windows_builder_setup?&#rubberband
http://mixxx.org/wiki/doku.php/macosx_builder_setup?&#rubberband
(It's packaged in Debian so Debian/Ubuntu is easy)

Best regards,
RJ