YAMAHA MK-100 is one of the earliest workstation
that integrates a synthesizer, a drum machine, a multi-part sequencer / arranger,
an effect, 49-key mini-keyboards, two speakers, and a storage interface to cassette.
The synthesizer section uses 2 single-cycle PCM waveforms to generate sounds.
YAMAHA MK-100 (1983)
See the links below for MK-100 info and .mp3 sound examples.