The Moog Source is a monophonic Z80 microprocessor-controlled analog synthesizer manufactured from 1981 to 1985.
The Source was Moog's first synthesizer to offer patch memory storage. The design was also the first (and only) Moog synthesizer to feature a flat-panel membrane keyboard to replace the standard buttons, knobs and sliders, along with multihued panel graphics that were very different from anything Moog offered at the time.
Arguably the closest sounding to the Minimoog than any other Moog from this era. All functions tested in great working order, membrane buttons operate as expected with smooth operation.