The Casio HT range does not do digital synthesis in real time (like the CZ's and VZ's). The waveforms are selectable, but cannot be modified hence my suspicion that they are in effect digitally sampled waveforms (which is kind of what PCM is).
The programmable parts on the HT's only apply to the VCF (filter) and DCA (amplifier) areas of the sound, the waveforms once selected are fixed. There is also an LFO that can modify pitch, but only that parameter. A shame it couldn't be rooted to the filter and/ or the DCA. At least not as standard.
The HT's CAN be modified to make them more versatile, and also to make the filter resonance self oscillating. The following link is to a guy the did some excellent mods on his HT 700 (and MT600 - the preset non programmable version) making it a much more interesting, and more powerful, baby synth.
and another interesting 'bent' MT600
And these links show a bit of programming can really make a standard HT700 really sing:
and here's a great song using an HZ600 (9;pro' version of the HT700/ 3000)
Listening to the above demos proves to me why this is such an underrated range of Casios, and why I intend to hang on to mine for a long time to come!
But PCM means just sampling, not some type of digital synthesis in real time. When talks about thin pulse waves, he means something different.
If only I understood well.
Daniel Forro
On 1 October 2013 13:24, Daniel Forró <dan.for@tiscali.cz> wrote:
But PCM means just sampling, not some type of digital synthesis in real time. When talks about thin pulse waves, he means something different.If only I understood well.Daniel ForroOn 1 Oct, 2013, at 9:16 PM, 350ypvs@... wrote:I just pulled off the cover of my (working) HT6000 and there written on the keyboard, staring at me, is 9;Pulse Code Modulation'. I should've remembered that rather than Casio's fancy 'Spectrum Dynamics' label! Therefore you are most probably very right about the raw sounds being pulse code generated, effectively digital waveforms! This kind of makes sense as many of the later Casios (mid to late 1980's onwards) used PCM generated sounds. Add the HT model's chorus, analogue filter and the ability to adjust the amplifier and filter envelopes (plus ring mod, detune and velocity on the HT6000) to give you some quite unique sounds.Like you, I love my HT6000 so much that when my first model died suddenly, I snapped up the next one I found on Ebay. It probably cost less than having my original repaired, though I do hope to get that one working again sooner or later.It is quite unique sounding, part way between digital and analogue. For some reason the 'single oscillator' 700/ 3000 and HZ600 models sound more analogue, though the 6000 is more versatile. And if you use the ring mod waveforms and detune the 4th 'line' to 73, you get a sub-oscillator effect to generate lower bass frequencies. Not quite in the Roland Juno 60 or Moog league, but certainly enough to be usable for bass lines.Thanks also for the compliment on my Casio collection! The best thing about it is that most the boards didn't cost much at all. The most expensive were the CZ101 (90GBP back in 1990) and the CZ-1 (125GBP). Most cost between 10 - 20 GBP. Even the VZ-1 I picked up for only 70GBP! There are bargains still to be had, though some models are now more sought after, especially the CZ101 and HT6000 with prices rising accordingly. None are 'big' money compared with similar aged Roland/ Korgs/ Yamahas. Even the new XW-P1 is a bargain for what it offers at the price, compared with the competition, with many magazine reviews placing it in a class of its own.Long live Casio!On 1 October 2013 12:39, <analogmonster@...> wrote:
I completely agree generror is wrong about the ht/hz range. I LOVE my ht6000, nothing else sounds like it. Some day I will open it up and take a scope to the filter input as I want to see what the raw waveforms look like. If you have the filter open as much as possible it definitely sounds very digital and unique, certainly nothing like my cz1000 and vz10m and theoretically the ht6000 should be between the two if it were a pd synth.The most talked about theory for the makeup of the ht6000 voice is that it is entirely based on thin pulse waves combined using the built in envelopes, ring mod, tremolo etc. this makes a lot of sense to me when I listen to it. Still it would be nice to know for sure.