The operators for moving in sound space are similar to those of the speech space (see s:speech_space). The distinguishing factor here is that sounds have duration, so the duration needs to be specified. This either takes the form of a simple time unit or is specified in terms of synchronizing the non-speech audio with events on other components, e.g., ``play this sound until a particular event has completed''. As discussed in s:combine_afl_subspaces, the AFL block serves as the smallest unit of synchronization.