KAWAI XS-1 16bit Synthesizer Module is a PCM synthesizer which combines PCM samples and single cycle DC Waves.
It has no filter but still produces some unique sounds.
KAWAI XS-1 (1991)
It seems to be the module version of KAWAI SPECTRA KC10, as the specification of the synthesis engine looks the same.
KAWAI SPECTRA KC10 (1991)
I made an XS-1 editor for Emagic SoundDiver.
Follow the link below for the downloads and sound samples.
I hope it would work with SPECTRA too, but I'm not sure.
Please tell me if you have a SPECTRA and SoundDiver.