Casio CZ/ VZ/ FZ - Pro Series

I just finished a first version of a cz-101 patch editor in max msp that's working well for me so far. I'll put it up soon and would love to have some people test it out.



On Aug 29, 2013, at 5:47 PM, charlie midi gfa <charles.copp@...> wrote:

> i'll admit , i wrote an almost complete program to edit the cz 101 sysex and
> design sounds....it could access all these waves mentioned and do more to
> simplify sound design .... there were a few sounds i made that had unique
> prperties and i attributed this to the fact the editor was easier to use
> than
> the cz at making sounds . but the more i look into this sectrum the more
> what manduca says is tru ,,,some additional features can be accessed while
> using an external editor.....
>
> good luck ,, i sold my cz 101 last year but do have a cz1 to work with now
> trying soon to write a cz1 editor...
> thanks
>
> charlie
>
> ----- Original Message -----
> From: "F.Manduca" <resistenzaaoltranza@...>
> To: <CZsynth@yahoogroups.com>
> Sent: Thursday, August 29, 2013 8:13 AM
> Subject: Re: [CZsynth] Triangular Wave Modulation = Phase Distortion? (Casio
> PCM engine patents)
>
> Hi,I don't know if the thing I am writing now can be related to this post,
> but I read somewhere that there are some hidden features via sysex about
> waveforms and modulation. It should be described here:
> "http://homepage.mac.com/synth_seal/html/cz1.html" , but I can't reach it
> through my Pc. Does the link exist anymore? Did someone saved the page?
> Maybe I have it saved on the several Usb keys I have, or on my spare Hard
> disk. I am going to try and check. I also read there is an I-Pad editor with
> these secret features. According to the page
> "http://www.matrixsynth.com/2012/07/accessing-casio-cz-series-hidden.html"
> "Accessed via the iCZ - iControlMIDI (iTunes) Casio CZ series editor on
> iPad.
> Quick tutorial: The Casio CZ series are Phase Distortion synths - Casio's
> version FM synthesis. With Yamaha FM synthesis there are carrier waveforms
> and modulator waveforms. The carrier is
> what you hear and the modulator modulates. The DX7 has various
> combinations of them modulating each other referred to as algorithms.
> On the CZ series, and referenced below, Waves are carriers and "Window
> Waves" are modulators.
>
> "We are using a Line 1 + Line 2'
> structure, but not using both Lines at the same time. Line 1 DCO Wave 1
> is Null (Hidden Wave); Line 1 DCO Wave 2 is Sine Sync and Line 1 Window
> Wave is Triangle. Line 2 DCO Wave 1 is Double Sine; Line 2 DCO Wave 2 is
> Off and Line 2 Window Wave is Spike (Hidden Wave).
> In the first part, only Line 1 can be heard.
> In
> the second part, we are using iControlMIDI increase the DCW1 Level 1 to
> max which makes the Window Modulation sounds like a resonant filter.
> In
> the third part and last, we are using iControlMIDI to add Line 2' (so
> with Detune) and you can hear the Window Wave Spike effect which almost
> sounds like a distortion whereas the Line 2 DCO Wave 1 Double Sine
> sounds like a back-end sawtooth.
> There is a very short software delay and software chorus.".
> All the best!
>
> ________________________________
> Da: CYBERYOGI =CO= Windler <cowindler01@...>
> A: CZsynth@yahoogroups.com
> Inviato: Domenica 25 Agosto 2013 2:36
> Oggetto: [CZsynth] Triangular Wave Modulation = Phase Distortion? (Casio PCM
> engine patents)
>
> Triangular wave modulation (US patent 5164530) is an FM-like Casio
> speciality that generates waveforms by modulating a monotonous carrier
> function with a sine (or other) wave and decoding the signal by mirroring it
> at a triangular wave. With the same count of operators (here only 2?) the
> produced waveform has higher harmonics than normal FM because at high
> modulation the wave peaks fold back into the opposite direction. Without
> modulation it outputs a sine wave and so can nicely blend between very dull
> and bright timbres. The carrier waveform stands in ROM and so can be
> switched between a variety of timbres. Like with FM, operators can be
> combined in various ways.
>
> https://www.google.com/patents/US5164530
>
> - Is TM part of the "phase distortion" engine or something else?
>
> I own a CZ-230S and revived a CZ-101 (had severe water and fire damage), but
> I am no PD expert and never heard about TM synthesis before (even websearch
> doesn't help much). Is this used in phase distortion synths (e.g. the later
> VZ-series) or was this only used in the Casio "Pulse Code Modulation" engine
> of preset sound keyboards? Patent 5164530 suggests that Casio at least
> planned to make dedicated TM synthesizers with a PD/FM-like user interface.
>
> I am reworking my technical keyboard descriptions for the WarrantyVoid site.
> So I websearched for 1980th keyboard patents and discovered a lot of
> interesting info.
>
> https://www.google.com/patents/US5319151
>
> This is what I wrote for my SA-series page:
> >>>
> The sound generation is apparently based on a highly complex softsynth with
> many algorithms those can perform PCM, DPCM, FM and TM (triangular wave
> modulation) synthesis with sophisticated envelopes. These Casio PCM
> algorithms are described in the US patent 5319151. This rather confusing 121
> page tome however is ambiguous because it covers plenty of different
> implementations those e.g. can employ different counts of chip-internal
> sub-CPU cores for sound generation in higher grade instruments. The
> SA-series is surely the cheapest described "First" or "Second Embodiment"
> which has none. The algorithms for this version even describe how shorter
> tasks are stuffed with blank "dummy commands" to keep the timing in sync
> when different sounds would need different computing time. It works indeed
> very VCS2600-like - a marvel of freakish realtime programming made from one
> big loop (plus in "First Embodiment" one timer IRQ to compute waveforms and
> fill the DAC
> output FIFO; the "Second" does even this during dummy commands).
>
> The interpolation method with that Casio smoothly blends between wavetable
> sections is described in the US patent 4442745 "Long duration aperiodic
> musical waveform generator" It plays sections of compacted samples back and
> forward to implement things like long decaying cymbals. US patent 4958552
> explains algorithms how envelope data is extracted from natural instrument
> recordings and applied on loop samples as a approximated segmented
> functions. The original envelope may be removed from the stored loop sample
> by a waveform normalizer (US patent 4691608). Most important is that these
> chained envelopes can have basically any length and have (unlike e.g. ADSR)
> no fixed count of steps. Combined with crossfading between adjacent loop
> samples this permits very flexible sound definition.
>
> The US patent 5319151 "Data processing apparatus outputting waveform data in
> a certain interval" mentions for the "First Embodiment" that the chip size
> is only 5x5mm, a program word has 28 bits (including lower potion of next
> address) and these further hardware specs:
>
> "With regard to the circuit scale and the operation time of the specific
> embodiment (PCM sound source system capable of producing eight polyphonic
> sounds) the control ROM has a size of 112K bits, RAM 445.4K bits and the
> control data/waveform ROM (for 100 timbres) 508K bits; one machine cycle is
> about 276 nanoseconds with a maximum number of cycles of the interrupt
> program when invoked being about 150; and the executing period of the
> interrupting process (tone output sampling period) is about 47
> microseconds."
>
> Expressed in KBytes this would mean 55.7KB RAM, 14KB program ROM and 63.5KB
> sound ROM, which isn't far away from a Commodore C64 with large ROM
> cartridge. Said CPU speed would be about 3.6 MIPS.
> <<<
>
> Higher grade MIDI keyboards like MT-240, MT-540 or MT-750 certainly have
> sub-CPU cores for 16 bit sound generation. Their external ROM is 512KB up to
> 1MB.
>
> - Does anybody know more about this sound engine?
>
> MAY THE SOFTWARE BE WITH YOU!
>
> *============================================================================*
> I CYBERYOGI Christian Oliver(=CO=) Windler
> I
> I (teachmaster of LOGOLOGIE - the first cyberage-religion!)
> I
> I !
> I
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