The MoMu release of the Synthesis Toolkit (STK, originally by Perry R. Cook and Gary P. Scavone) is a lightly modified version of STK 4.4.2, and currently supports the iPhone platform (iPhone, iPad, iPod Touches). The MoMu release was made to support the MoMu Toolkit (for example, to use real-time audio I/O with STK, you can use MoMu's mo_audio module), developed as part of the Mobile Music research initiative in Music, Computing & Design group at Stanford University's CCRMA, in collaboration with Smule. MoMu Toolkit is released under a BSD-like license, while MoMu-STK retains the original STK license.