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Re: [CZsynth] Casio CT-6000: has it phase distortion? (main ICs?)

2013-10-12 by Paul Krull

It's a real bonanza around here at the moment for some good old Casios:
A CT-610 which I hadn't even heard of: http://seattle.craigslist.org/see/msg/4113684068.html

I'm not involved with any of these sales and am managing to contain myself from buying any of them even though the CT-610 looks interesting and is only a mile or so from where I live. That reminds me though that my DH-100 is a big mess with the squeally chip failure, the bell disconnected and something or other else wrong if I recall. I should send it off for repairs but it still looks cool propped up in the window sill.
I think using Queensryche in a spelling bee would be cruel and unusual and could scar children for life: there's supposed to be an umlaut in there somewhere and I believe it's not where umlauts are generally supposed to go but I couldn't be bothered to begin to figure out how to apply one from a keyboard or figure out where it might need to go. And please don't tell me where my umlaut needs to go.
Paul T



On Friday, October 11, 2013 11:16 AM, "350ypvs@..." <350ypvs@...> wrote:


90GBP? Though it looked like it went for less as you accepted a 'best offer'? Someone got a bargain there! If I hadn't found my second HT6000 about a month back I would've snapped it up!


On 5 October 2013 20:39, Ian Webster <ianwebster04@...> wrote:
I have put my HT6000 up for sale on a Buy it Now at Ebay.co.uk if anybody is interested..


On Fri, Sep 27, 2013 at 3:04 AM, <cowindler01@...> wrote:
The Casio CT-6000 from 1984 was Casios first keyboard with velocity sensitive keys and midi. It also has very versatile accompaniment and can layer sounds. I always thought it was based on Consonant-Vowel-Synthesis (crossfaded stair waveforms with analogue filter, like MT-65), but some people claim it was based on phase distortion. The first official PD preset keyboard (marketet as such by Casio) was its even bigger successor CT-6500, which (how silly is this!) had no velocity sensitive keys anymore. I yet haven't bought a CT-6000 (takes much space), but it seems to be a true technical milestone.

- What are the main ICs?

If CT-6000 has sound ICs "NEC D931C", then it is definitely consonant-vowel. In oppsite to this, the phase distortion IC in my CZ-101 is "NEC D933D".

Are anywhere PCB photos online?

- Is the percussion semi-analogue or sample based?

The sound quality on YouTube wasn't high enough to identify this.



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