page_title: Casio SD Synthesizers
section_title: HT-700
hierarchical_section_title: Casio SD Synthesizers / Summary of Models / HT-700
caption_attribution_description: A Casio HT-3000 from the mid-eighties, poor quality image but you get the point. Note: Casio HT-3000 was also sold as Hohner KS 61 with light grey body. References Christian Oliver Windler. Hohner JS 49 (Hohner version of Casio HT-700). TableHooters - Warranty Void - CYBERYOGI. "Casio also released an 61 fullsize keys variant of their HT-700 as Casio HT-3000, which had an additional modulation wheel (that may be also addable to the HT-700 and KS 49 as a hardware easteregg); a light grey version of it was released as Hohner KS 61."
context_page_description: Casio's SD Synthesizers were a late-1980s line of hybrid digital-analog synthesizers featuring a resonant analog filter. SD synthesis was very similar to traditional DCO-analog synthesis, with the main difference being that some of the SD digital waveforms' harmonic spectrums changed temporally, or dynamically in relation to the amplitude envelope. SD synthesis is used in six Casio synthesizers and home keyboards released in 1987 and produced until 1991, when Casio exited the synthesizer market completely and focused solely on pure consumer keyboards. Due to some programming limitations plus Casio's poor marketing, the SD synths never gained wide popularity and are now fairly rare in the second-hand marketplace. There still exists a small but devoted fanbase who insist that SD synthesis, particularly as expanded in the high-end model HT-6000, was overlooked and highly underrated.
context_section_description: The HT-700 was the user programmable version of the MT-600 (hence the prefix HT). It included the fully editable SD synthesis of the HZ-600, plus it took the auto-accompaniment of the MT-600 and made it fully editable too (a very rare and powerful feature). Users could fully program their own 2-measure patterns consisting of drums, basslines and chord inversions. The fill-in measure was also programmable. The HT-700 had 49 mini-keys and a pitch bender, and looked somewhat similar to the MT-600. Unlike the MT-600, though, it included a programming wheel and a card slot for Casio RA-100 RAM cards. The HT-700 and other HT synths could not store nearly as many patches to a RAM card as the HZ-600, because most of the RAM card capacity was reserved to store accompaniment patterns and chord/operation sequences. The HT-700 was also sold by Hohner in Germany as the 'KS-49 midi' (with slightly different preset sound set).
caption: The Casio HT3000
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