Rubber Band Library version 3.1.0 released with speed and code-quality enhancements
-----------------------------------------------------------------------------------

Version 3.1.0 of [[/rubberband|Rubber Band Library]] is now available.

Rubber Band Library is an audio time-stretching and pitch-shifting
library and utility designed for musical applications. It allows you
to change the tempo and pitch of an audio recording independently of
one another.

Following [[/news/20220707.html|the release of version 3.0.0]] which
added the entirely new higher-quality R3 processing engine as an
alternative to the traditional Rubber Band R2 engine, this release now
provides a faster, more energy-efficient "draft" mode for the new
engine. This can be enabled using the `OptionWindowShort` option on
construction (an existing option that was previously only supported in
the older R2 engine).

This release also includes a number of other enhancements, including
support for the external `speexdsp` and `sleefdft` libraries and many
code-quality improvements. See the CHANGELOG for more details.

For more extensive discussion of the changes in this release, please
see
[[https://thebreakfastpost.com/2022/09/30/performance-improvements-in-rubber-band-library/|this blog post]], "Performance improvements in Rubber Band Library".

The API is unchanged and the library continues to be binary compatible
with the 2.x and 1.x releases for existing applications. Code written
to use earlier versions of the library can link and run against this
version without alteration.