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CTK-711EX = CTK-1000 synth with built-in floppy drive?!


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On eBay I saw a rare workstation keyboard Casio CTK-711EX, which looks like an even bulkier variant of the mythical CTK-1000 with additional LCD display, 232 ToneBank, 110 rhythms and 3.5'' diskette drive. May it be that this one was "the real thing" while CTK-1000 was only a cut down household variant?

(See here for my info and hardware analysis of CTK-1000.)

Here is a YouTube clip about the CTK-711EX:

My CTK-1000 panel PCB contains a strange adapter like when the hardware was originally designed for something else. Perhaps it was the LCD based CTK-711EX. This would namely explain why the fairly complex sequencer and synth in CTK-1000 was made but not means of data storage.

By the way, I found out the mysterious meaning of "IXA Sound Source". It's "Integrated Cross-Sound Architecture" (thanks Synrise for info), which IMO sounds more like an advertisement name without technical meaning and therefore likely soon was dropped by Casio.

I just found the CTK-711EX service manual from 1998, and the main ICs do strongly differ (see CTK-1000 hardware analysis). Thus it is likely more the case design than technical similarity.

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IIRC, CTKs 711ex and 811ex are "upgraded" versions of CTKs 601 and 611. I had a 601, it's a nice keyboard with some limited editable parameters. Nothing huge, but thanks to the synth section it's capable of doing interesting sounds. It's definitely different from the CTK-1000, though (I had both at the same time to compare), but I would say that they're both nice instruments. A friend of mine repaired a 711ex when I still had my 601 - which is in his hands now, by the way - and I remember that it had the same timbres and rhythms plus more, so it's probably the same sound generator with extra features. For instance, it had a sort of "wah lead" sound (I'm not sure what it was actually called) that the 601 didn't.

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On CTK 711 EX the scheme of DSP effects were:
10 (REVERB 1, 2, 3; CHORUS; TREMOLO; PHASE SHIFTER; OR-
GAN SPEAKER; ENHANCER; FLANGER; EQ LOUDNESS


t correspond to the effects 00-09 found in Casio CTK 750 from 1994 (CTK 711 EX is from 1998) - except the older one had more - 16 in total - DELAY 1, DELAY 2, ANALOG DELAY, TAP DELAY, CHORUS REVERB, TREMOLO REVERB.

 

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