Assertion: workstation's keyboard | /r/HasProperty | portable
Facets:
value: for performers
type: PURPOSE
Source sentences:
text: The concept of a music sequencer combined with a synthesizer originated in the late 1970s with the combination of microprocessors, mini-computers, digital synthesis, disk-based storage, and control devices such as musical keyboards becoming feasible to combine into a single piece of equipment that was affordable to high-end studios and producers, as well as being portable for performers.