1Sonic is a simple algorithm for speeding up or slowing down speech. However, 2it's optimized for speed ups of over 2X, unlike previous algorithms for changing 3speech rate. The Sonic library is a very simple ANSI C library that is designed 4to easily be integrated into streaming voice applications, like TTS back ends. 5 6The primary motivation behind Sonic is to enable the blind and visually impaired 7to improve their productivity with open source speech engines, like espeak. 8Sonic can also be used by the sighted. For example, Sonic can improve the 9experience of listening to an audio book on an Android phone. 10 11A native Java port of Sonic is in Sonic.java. Main.java is a simple example of 12how to use Sonic.java. To play with it, you'll need a "talking.wav" file in the 13current directory, and you'll want to change the speed, pitch or other 14parameters manually in Main.java, in the main method. 15 16Sonic is Copyright 2010, 2011, Bill Cox, all rights reserved. It is released 17under the Apache 2.0 license, to promote usage as widely as possible. 18 19Performance test: 20 21I sped up a 751958176 byte wav file with sonic (a 9 hour, 28 minute mono audio 22file encoded at 16-bit 11.KHz), but with the output writing disabled. The 23reported time, running Ubuntu 11.04 on my HP Pavilion dm4 laptop was: 24 25real 0m50.839s 26user 0m47.370s 27sys 0m0.620s 28 29The Java version is not much slower. It reported: 30 31real 0m52.043s 32user 0m51.190s 33sys 0m0.310s 34 35Author: Bill Cox 36email: waywardgeek@gmail.com 37