This SQ-80 has been upgraded with a Gotek floppy emulator drive. The poly-aftertouch keybed has been restored (w/ the kit from Syntaur). In addition, the default soldered battery was replaced with a battery holder and a new battery. Overall in great cosmetic condition for its age (has some small scuff / scratches, see pics). The front panel is clean and the display reads perfectly.
It comes with a Voice Crystal 1 cartridge for accessing more sounds, in addition to the ones that can be loaded via the Gotek drive.
I recently loaded every sound bank individually that I could find onto the usb and labeled them by genre via sysex (bass, bass 2, brass, piano 1, pads, etc).
You can see each of the patches loaded here: https://www.donsolaris.com/?p=2800
The SQ-80 is basically a reved-up ESQ-1 with a total of 75 waveforms, a 61-note keyboard with velocity & aftertouch, floppy disk drive for storing patches and sequences, and an enhanced sequencer. Great for organs, analog-type sounds, pads and sound effects. Like the classic ESQ-1, the SQ-80 functions in providing analog-type 4-pole lowpass filtering and editing of digital waveforms. Each voice can combine up to 3 of the 75 waveforms. These waveforms include multi-sampled transient attack waves such as violin bow, plectrum picks, mallet, hammer, breath attacks and percussive sounds. There are also 5 sampled drum sets. Three LFOs are onboard for some pretty wild modulation of the sounds you create or edit. Complete MIDI implementation makes the SQ-80 great for any studio or live use too.