ReBirth RB-338 is a software synthesizer for Microsoft Windows,[1] Mac OS 8-9[2] and iOS for the iPhone, iPod Touch and iPad.

[3] It was developed by Propellerhead Software, and its first alpha version (for Mac OS) was publicly released in October 1996.

Shortly afterward, the ReBirth Museum Web site was launched and the last desktop version's (2.0.1) disk image was made available as a free download[4][5] and torrent.

ReBirth also features mixers, a pattern controlled filter (PCF) and some of the standard effects in software synthesizers like delay, compressor and distortion.

The program also supports user modifications, which may replace the samples in the drum machine emulations and modify the GUI.