SoundTouch
SoundTouch
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SoundTouch Audio Processing Library
About the SoundTouch library
The SoundTouch Library Copyright © Olli
Parviainen 2001-2005
SoundTouch is an open-source
audio processing library for changing the Tempo, Pitch and
Playback Rates of audio streams or files:
- Tempo (time-stretch):
Changes the sound to play at faster or slower speed than original,
without affecting the sound pitch.
- Pitch (key) : Changes the sound pitch or
key, without affecting the sound tempo or speed.
- Playback Rate : Changes both the sound
tempo and pitch, as if an LP disc was played at wrong RPM rate.
See here for example
sound clips of each control mode!
The SoundTouch library is suited for
application developers writing sound processing tools that
require tempo/pitch control functionality, or just for playing
around with the sound effects -- See here
for a list of applications that use SoundTouch library!
The SoundTouch library source kit includes also an example
utility SoundStretch that allows
processing .wav audio files with command-line interface.
SoundTouch library Features
- Easy-to-use implementation of time-stretch, pitch-shift and
sample rate transposing routines.
- High-performance object-oriented C++
implementation.
- Full source codes available for both the
SoundTouch library and the example application.
- Clear and easy-to-use programming
interface via a single C++ class.
- Supported audio data format : 16Bit integer or
32bit floating point PCM mono/stereo
- Capable of real-time audio stream processing:
- input/output latency max. ~ 100 ms.
- Processing 44.1kHz/16bit stereo sound in realtime
requires a 133 Mhz Intel Pentium processor or better.
- Platform-independent implementation: The
SoundTouch library can be compiled for any processor and OS platform
supporting GNU C compiler (gcc) or Visual Studio, for example Win32,
Linux, AIX.
- Additional assembler-level and Intel-MMX
instruction set optimizations for Intel x86 compatible processors
(Win32 & Linux platforms), offering several times increase in the
processing performance.
- Compiled executable binaries available
for Windows.
- Released under the GNU Lesser
General Public License (LGPL).
Download
Download Executable Binaries
Click the title to download
SoundStretch executable files:
- Win32
- for Windows 95,98,ME,NT4, 2000,XP [SoundStretch v1.3.1, 19-Mar-2006,
55 kbytes zip file]
- Mac OSX
- for Mac OS X and Darwin, won't work with classic OS. [SoundStretch
v1.3.0, 10-Feb-2005, 47 kbytes tgz file]
WARNING: This is a non-typical Mac
application in the sense that it doesn't have a graphical user
interface, but a plain text-based command interface only. In case of
allergic rejection reaction please apply ice bags and hydrocortisone
salve to blisters ;)
Download Source Code
Latest development version of SoundTouch source codes are available online in
a Subversion repository.
You can also download source code snapshot for SoundTouch library version 1.3.1
here [19-Mar-2006]:
These packages include:
- Full source codes for the SoundTouch
library & the SoundStretch
example utility released under LGPL license.
- Makefiles for building the library & the example
utility from source codes for any platform supporting
Visual C++ or GNU C compiler.
Browse the SoundTouch library README
file online here.
See here for older versions
of the SoundTouch library.
License
The SoundTouch library is open-source
software and is released under the GNU
Lesser General Public License (LGPL).
The library can be further distributed and used in other
applications subject to the LGPL license terms.
Contact Information
See the author personal information page for
contact information.
SoundTouch WWW page: http://www.surina.net/soundtouch
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