Changes the speed of the playback clock to the given multiplier. So passing 2.0 will play at double real time. Calling it again will still play a double real time; the multiplier is always relative to real time and will not stack.
See Implementation
Changes the speed of the playback clock to the given multiplier. So passing 2.0 will play at double real time. Calling it again will still play a double real time; the multiplier is always relative to real time and will not stack.