The HT series casio made back in the 80’s are quite odd- basic analog subtractive (with a single VCF), auto accompaniement and lofi digital drums ala RZ-1, no sampling though. My unit is still unmodified, and I’ve been trying to multisample the instrument sounds but jeeez, it’s too noisy! I’ll probably do some minor mods to it, i.e knobs for filters, maybe a LFO and a ext. input.
Anyhow, I love them. Enjoy.