via this auction
"Very underrated synth. Very similar sound to CZ synths BUT with analogue filters/VCA/Chorus and crunchy drum machine. [Update: Note the HT-700 used SD Synthesis while the CZ used Phase Distortion similar to Yamaha's FM synthesis] Boxed, as new condition with plastic over the screen:
Analogue filters
Analogue VCAs
Analogue Chorus
Sampled 8-bit drum sounds that resemble the legendary Casio RZ-1 drum machine
Fully programmable drum machine
3 part multitimbral (full control over midi plus from the keyboard)
Same as the HT-3000 but mini keys
Below videos are not mine (and AWFUL audio quality) but they do show what sounds are capable with a few simple mods... Here is a sound demo from the actual synth that is for sale: http://punkdisco.co.uk/misc/misc/audio/demo.mp3"