Casio CT-S1000V: Quick tips

One feels “all thumbs” when starting in with a new keyboard. The Casio CT-S1000V has a lot of functionality and customization below the MENU button and within the SETTINGS item in the main MENU. I made a map to help me get around:

MENU                      SETTINGS 
My Set-up Transpose
Active DSP Touch Off Velocity
Balance Split Point
Octave Shift Rhythm Auto Set
Sustain Chord Finger Mode
Portamento Rhythm Controller Type
Pedal SUS/UPPER PORT Button
Pitch Band ARP/AH Button
Knob Rhythm Volume
Arpeggio Song Volume
Auto Harmony Tuning
Sampling Surround
Song Audio In Center Cancel
Metronome MIDI OUT Channel UPPER1, UPPER2, LOWER
System Effects Local Control
EQ MIDI SYNC Mode
Scale Auto Power Off
MIDI Control Battery
Wireless LCD Contrast
Media Button Long Press Time
Home Customization Speaker
Settings >>>>>>>>>>>> Phone Speaker
Demo Setting Initialize
Exit All Initialize
Version

The Casio CT-S500 is probably organized in the same way.

MY SETUP Power On Recall

Yesterday, I mentioned MY SETUP and how useful it is for establishing a global set-up for a given playing situation. It’s also useful for establishing an initial set-up during power-up. Simply enter MY SETUP, select one of the four set-up entries, and press the AT PW-ON soft button. The CT-S1000V will recall the selected set-up during power-ups.

Even though it’s cool to get kicked into Vocal Synthesis at power-up — a nice marketing/sales ploy — I’d rather have a B-3 at my fingertips. 🙂

Active DSP HOLD

Active DSP assigns effect parameters to the three front panel knobs: K1, K2 and K3. The “Amp Organ 1” tone, for example, assigns the knobs this way:

  • K1: M1 Speed
  • K2: M1 OD Gain
  • K3: M1 Brake

K1 is the rotary speaker speed, K2 is the overdrive and K3 is the speaker break which stops simulated rotor/horn.

That’s great until you hit HOME or MENU and — what the??? The knobs are re-assigned to cut-off, resonance and modulation. That’s when Active DSP HOLD comes into play.

If you press the Active DSP HOLD soft button before leaving the Active DSP screen, the CT-S1000V will remember the DSP knob assignments when you go HOME or whatever. Save this in your set-up, too.

Slow your roll, Sparky

The first time your spin up the rotary in “Amp Organ 1,” you’ll be appalled at the short ramp-up time (acceleration) and the final rotor/horn speed. The Active DSP screen is also your way into the DSP parameters. I have the Drive Rotary effect applied to the organ. It has the following parameters:

  • Rotary speaker type
  • Overdrive gain
  • Overdrive level
  • Speed
  • Brake
  • Fall acceleration (ramp down)
  • Rise acceleration (ramp up)
  • Slow rate
  • Fast rate
  • Vibrato/Chorus
  • Wet level
  • Dry level

I like the sound of a beat-up Leslie with slow motors and slipping belts. Feel free to adjust the acceleration and slow/fast rates down.

Nice to see the chorus/vibrato simulation (V1, C1, V2, C2, V3, C3). The Hammond had a unique chorus/vibrato scanner unit which is a necessary component of gospel organ registrations. I’d love to see more details about Casio’s rotary speaker emulation including the scanner and speaker types.

Oh, yeah, please let us assign rotary speaker speed to the foot pedal. Thanks.

Boing

I wish I could see more details about the reverb, chorus and delay effects, too.

CT-S1000V has three system-wide effects: reverb, chorus and delay. Usually you get only reverb and chorus, and don’t always see a separate delay unit. Cool.

Unlike the DSP effects, you do not get to tweak system-wide effect parameters. All you get are presets with rather uninformative names like Room 1, Hall 2, etc. I listened to the room reverbs and settled on Room 2 for church registrations. Although ears should be the final judge, I wish I could see the parameter values behind the presets in order to make good choices.

I recommend publishing an effect routing diagram like the one I found in the CT-S5000 manual (below). Thanks.

Casio CT-X3000/CT-X5000 effect routing diagram [Casio]

Copyright © 2022 Paul J. Drongowski

Casio CT-S1000V: Observations

Gonna post a few notes while I take an ear break.

I’m rather pleased with the sound and play-ability of the Casio CT-S1000V. For now, I’m focused on sound design and playing, having only dipped into the auto-accompaniment rhythms and vocal synthesis.

Patches

Sounds, not the song. (Sorry, Clarence Carter.)

My first order of business is building a bunch of sound combinations that are suitable for the contemporary and traditional church music that I play. Jazz, funk and pop will have to wait a little while…

The CT-S1000V provides two different means of storing a patch: My Set-up and registrations. My Set-up is accessed through the main MENU button. Up to four set-ups can be stored. As I quickly discovered, My Set-up stores everything but the kitchen sink including settings like speaker ON/OFF. I sacrificed the fourth location (SAX) and created a LINE OUT entry with the internal speaker turned off. This seems like a good use for My-Setup, namely, saving global configurations for different playing situations, e.g., home, gig, etc.

Registrations are more appropriate for tone (voice) programming. There’s more registrations than My-Setup locations: 16 banks with four registrations per bank, 64 registrations total. That may seem stingy by today’s standards, but I don’t need more than 8 to 16 locations to cover most of my gig needs. Plus, one can always save registrations to a USB flash drive and load them as playing situations arise.

Tone programming

Registrations can save most everything related to tone programming: split, layer, effects, and much more. Yes, you can edit CT-S1000V tones — one reason why I passed on the CT-S1 and waited.

Tone editing is similar to “quick edit” that you might find on a synth. You can tweak 21 parameters including cutoff, resonance, attack time, release, vibrato, volume, pan, effect sends and 4-band EQ. You don’t get synthesizer-level deep editing. Cutoff, etc. are offsets (-64:+64) from the preset value. If you want it all in front of you like MODX or Montage, this isn’t the droid you’re looking for.

With only three front panel knobs, you need to assign a tone parameter to a knob first, then tweak. The changed value is saved along with everything else in a registration (including the knob assignment).

DSP editing, on the other hand, is deep. Using a feature called “Active DSP”, you can choose an effect type, assign a parameter to a knob, and tweak effect parameters. I’m still experimenting with Active DSP, especially for controlling rotary speaker speed. I’ll have more to say when I have a better grip on Active DSP.

Splits and layers

The CT-S1000V works logically and supports two split zones: Lower and Upper. When Split is turned off, all’s you get is Upper. Upper supports two layers: Upper 1 and Upper 2; Lower cannot be layered. The split point is configurable and you can adjust the balance (level) between tones. This is just enough to be dangerous. If you’re looking for a pile of layers, move along.

Starting with my Roland days (circa 1995), I’ve kept notes about the most useful tone combinations for contemporary church music. Here are my favorite combinations:

               Tone 1       Tone 2       Tone 3        Tone 4 
----------- ----------- ------------ ------------
High School Tuba A Celesta Flute 1A Clarinet A
Warm Tp Sect Tbs mp C Tbs mp B Tbs mf C Brs LipNzl
CTp + Tb Sect C Tps mp A Tbs mp A C Tps f A Tbs f A
Horn+Wood Flute 1A Clarinet C Oboe mf A Horns mf A
NobleHornPop Horns f A Flugel C Tb Sect B Trumpet 1C
NobleHornPop French 1C Flugel C Tb Sect B Trumpet 1C

Orch Reeds Oboe mf A E.Horn C Oboe f A
Wind&Str1 Oboe mf A Flute 1B DolceStr.A JV Strings A
Wood Sect Oboe mf A Flute 1A Clarinet A E.Horn A
Flute/Clari Flute 1C Clarinet C

ChamberWinds Oboe mf B Oboe mf A Sop.Sax mf A Flute 1A
ChamberWoods Clarinet A Flute 1C Flute 1A

Warm Strings Soft Pad A F.Str mp A JP Strings2C JP Strings1A
ChmbrQuartet Violin C Violin 2 A Cello A Cello 2 A
ViolinCello Vc mp B Bassoon A Va mp A Oboe mf A

These combinations date back my old JV-90, XP-60 and XV-5050! You’ll find equivalents on my MODX and Genos. My task now is to build similar combinations (registrations) on CT-S1000V.

BTW, I’m also dialing back reverb where necessary. I try for a happy balance — not too dry for practice at home, but not so much as to murk up the sound in a reverberant church hall.

If I had one wish, I would like to give each registration a name. I have a running map of “which registration does what,” but wish the names appeared on the CT-S1000V screen, not “Bank 1-1”.

Tones for old bones

By and large, the CT-S1000V orchestral tones are decent; most of them are musically useful and sound good through both the built-in speaker and an external monitor. The tone parameters are enough to cure overly bright tones or sharp attacks. Although I haven’t worked with them yet, the chromatic percussion (celeste, glockenspiel, etc.) don’t have any obvious tuning issues and are musical.

Two layers aren’t much. Fortunately, CT-S1000V has a few preset combi tones — Brass & String, Violin Section, Chamber (orchestra), Flute & Oboe, Pipe Section — which provide another “layer” or two on the cheap.

Don’t forget about the ethnic voices. CT-S1000V has accordions, fiddle, and harmoniums. Harmoniums! Jazzers who want to get their Jon Batiste on should look to these for melodica.

Organs

The CT-S1000V pipe organs are decent. Yes, there is the usual over-done reedy sound, but there are three tone presets that are suitable for hymn-playing and congregational singing. Even though the keybed is squared-off and similar to piano keys, it has a nice resistance and allows the legato-like gestures one uses when playing a pipe organ.

The drawbar organ tones are serviceable. No, we’re not in clone territory here and you can’t change the drawbar settings. There are rotary speaker effect algorithms, but again, we’re not in Vent or clone territory quality-wise. The only way to change rotary speaker speed is via Active DSP and turning the knob to which rotary speed has been assigned. I wish there was a way to assign rotary speed to the foot pedal. (OK, I need two wishes from the Genie.)

On the up-side, the rotary effect has a brake setting. One could brake the rotary and put the LINE OUT into a Lester K, Vent, or whatever. I will be giving this a try and will post notes. With Lester on the floor, I could stomp on a foot switch and change rotary speed, too.

Summary

Well, I hope these observations are helpful! The Casio CT-S1000V has a lot of sound-making value for very little money. So many tones to try…

Copyright © 2022 Paul J. Drongowski

Casio CT-S1000V: First impressions

After test driving the Casio CT-S1 and CT-S410, I took the plunge and bought a Casio CT-S1000V (AiX Sound Source with Vocal Synthesis, $450USD street). The price was irresistible after making a trade-in. (The Yamaha SHS-500 Sonogenic retired.)

In terms of build quality, the Casio CT-S1000V is robust enough for light to moderate gigging. It feels solid. I miss the fabric speaker covering (Casio CT-S1) as it is a touch of class. I suspect that fabric would get dirty on gigs, however. I wouldn’t park any drinks on this keyboard (or any keyboard) with everything exposed! Yep, it weighs ten pounds, not bad for a keyboard with in-built speakers.

Casio CT-S1000V

The power supply is a small lump-in-the-middle brick. The mains lead is rather short with one of those “figure 8” IEC 60320 C7 plugs. Other accessories include a music stand and a Casio WU-BT10 Bluetooth dongle — don’t lose that tiny little bugger! The music stand isn’t super-robust and I’m not sure that I want to park a heavy binder o’tunes on it. It’s also too low for my reading glasses and I will probably stick to my usual tripod music stand.

The CT-S1000V keybed is rather nice for a keyboard in this price range. The keys are squared off and piano-like although there’s no hammer simulation, of course. The keys are evenly spaced, are level, and don’t wobble too much. The keys have a textured surface similar to the Roland GO:KEYS. The throw is a little bit light and soft, not unpleasant. (BTW, I couldn’t stand the Roland GO:KEYS and returned it due to keybed issues.)

I can hand-swipe without cutting my hands. I don’t know how the keys will stand up to this kind of abuse in the long run. Plus, this board is so light, I’m afraid of throwing it off the keyboard stand when swiping!

The speaker sound is OK. I regard the speakers as “courtesy speakers.” Sometimes it’s convenient to push only one switch and start playing. They’re loud enough for my studio room, maybe loud enough for the church gig where we don’t generate a lot of stage volume. They don’t get buzzy at loud volume. Since I don’t play at very loud volume at home, I’m good with that. Casio wisely blessed the CT-S1000V with 1/4″ stereo output jacks so I can send the CT to the church PA.

I read just enough of the manual to enable Active DSP, which assigns DSP parameters to the knobs. With an organ tone selected, turning knob 1 (K1) switched between slow and fast rotary speaker speed. Wish there was a way to assign rotary speed to a button or the foot switch… I need to experiment more with Active DSP. Gotta experiment with splits and layers, too. I guess everything is saved to a registration, but we’ll find out!

I played with Vocal Synthesis enough to know there are multiple Vocalists. Some Vocalists are more natural than others. One of the Vocalists is “Death Voice” and I would like to uncork that one in church. 🙂

Quite a playable instrument. I haven’t listened to any of the rhythms yet because I’m mostly interested in flat-out playing. Switching sections (intro, main, fill, etc.) with the buttons below the display reminds me of switching arpeggios on the Yamaha MOX/MOXF.

Hope these impressions help!

Copyright © 2022 Paul J. Drongowski

Casio speech synthesis technology

The voice synthesis in Casio’s new CT-S1000V keyboard raised quite a bit of interest on the Web, including my own curiosity.

I installed the Casio Lyric Creator app on my iPad just to see what I can see. Lo and behold, there is a long list of open source licensing statements which identify some of the voice synthesis technology in the app and the keyboard itself. Let’s take a look starting with the top of the list.

HMM-based speech synthesis engine, HTS_engine, developed by the HTS Working Group. That’s a lot of acronyms and shoulders to stand on:

  • HMM: Hidden Markov model
  • HTS: An HMM-based speech synthesis system
  • SPTK: Speech Signal Processing Toolkit

The HTS Working Group is a voluntary group developing the HMM-based speech synthesis system HTS. The software bears a joint copyright from two institutions:

  • Nagoya Institute of Technology, Department of Computer Science, and
  • Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering

The HTS_engine API is released under the Modified BSD license. I won’t quote such chapter and verse everywhere, but it gives you a sense of the distribution terms and conditions. Read about HTS version 2 in “The HMM-based Speech Synthesis System (HTS) Version 2.0“, by Heiga Zen, et al., Sixth ISCA Workshop on Speech Synthesis, 2007.

HMM-based singing voice synthesis system, Sinsy, developed by the Sinsy Working Group. This software bears the copyright of Nagoya Institute of Technology, Department of Computer Science.

Speak Signal Processing Toolkit, SPTK, developed by the SPTK Working Group. Again, the toolkit has a joint copyright:

  • Nagoya Institute of Technology, Department of Computer Science, and
  • Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering

CRF+ by Taku Kudo. “CRF” is an acronym for “conditional random fields”. CRFs are a class of statistical modeling methods that are used in pattern recognition and machine learning.

The developers also acknowledge other work which was used during speech analysis:

  • WORLD: A high-quality speech analysis and synthesis system based on vocoding.
  • CMUdict: The CMU Pronouncing Dictionary from Carnegie-Mellon University, Pittsburgh, PA (my old school)
  • Festival Speech Synthesis System, Centre for Speech Technology Research, University of Edinburgh, UK.

For (more than) an introduction to HMM-based speech synthesis, try: “An Introduction to HMM-Based Speech Synthesis” by Junichi Yamagishi, October 2006. That should be enough math for you. 🙂 This presentation is super helpful, too.

Casio’s voice synthesis technology is not Yamaha Vocaloidâ„¢. Vocaloidâ„¢, by the way, is a registered trademark belonging to Yamaha. I have seen punters on the Web attribute the technology to Vocaloid or Yamaha. “Oh, they must have licensed it.” Wrong. Please do not refer to Casio’s tech as “Vocaloid” as this is technically incorrect and a misuse of Yamaha’s trademark.

Plus, we want to give credit where credit is due. Casio have staked out their IP territory in a series of patents filed on their behalf.

Want more information? See Casio singing synthesis in pictures.

Copyright © 2022 Paul J. Drongowski

New Casio portable keyboards

Casio CT-S1000V

Casio have announced the new CT-S1000V keyboard with vocal synthesis:

  • 61 full-size touch response keys plus pitch bend wheel
  • 64 voice polyphony
  • 3 assignable knobs for controlling modulation, effects, filters, and more
  • 800 AiX-powered Tones and 243 full accompaniment Rhythms
  • Advanced Tones (including vintage keyboards
  • Editable DSP effects (100 effects)
  • Split and layer (Upper 1/2, Lower 1)
  • Powerful bass-reflex stereo speaker system with surround effect
  • Two 13cm by 6cm speakers, 2.5W per channel
  • Audio sampler and 6-track MIDI recorder (sequencer)
  • Audio sample format: WAV, 44kHz, 16-bit, stereo
  • Vocal synthesis with personalized lyrics via the free Lyric Creator app
  • Vocal format: 44kHz, 16-bit, mono
  • Bright backlit LCD display with easy, intuitive interface
  • Strap pins for playing anywhere
  • 1/4″ line outputs to connect to mixers, PA systems, etc.
  • Class-compliant USB-MIDI connects to the free Casio Music Space iOS/Android app
  • Includes WU-BT01 Bluetooth MIDI/Audio adapter
  • Optional 6xAA battery power (AC adapter and music rest included)
  • Weight: 10 pounds
  • $449.99 USD (street)
Casio CT-S1000V portable keyboard with vocal synthesis

Quoting the Casio web site:

The CT-S1000V does what no other keyboard can do: Speak or type your lyrics into the free Lyric Creator app for iOS/Android, transfer them to the CT-S1000V, and play the keys to hear your words come alive. Choose from multiple vocalist models, and adjust age, vibrato, portamento and other parameters in real time. It can produce choirs, robotic sounds, vocoder-like textures, and more. You can even create a custom vocalist based on an audio recording.

Availability — “Coming soon”.

Please see my pre-announcement post for more pictures and information. I also have posted a list of recent Casio patents related to sound synthesis and vocal synthesis.

Vocal Synthesis

According to Casio, you can create lyrics using their tablet-/phone-based Lyric Creator app, transfer them to the CT-S1000V, and play them using the keys. You can dynamically change characteristics like age, gender, portamento and vibrato in real time. Of course, you can mangle the sound with DSP effects, too. The front panel knobs are assignable for real time control.

NOTE mode chooses how the lyrics play-back when keys are pressed. You can play a word or syllable with each key press or you can play choral harmonies. PHRASE mode follows your timing. Legato gestures change note (pitch) while the phrase is playing. You can also select a syllable with your left hand and use your right hand to play it.

Casio Lyric Creator [Casio]

Lyric Creator lets you edit, save and share lyrics. Lyrics can be imported from MusicXML files.

Casio CT-S500

Casio have announced the new CT-S500:

  • 61 full-size touch response keys plus pitch bend wheel
  • 64 voice polyphony
  • 3 assignable knobs for controlling modulation, effects, filters, and more
  • Editable DSP effects (100 effects)
  • Audio sampler and 6-track MIDI recorder (sequencer)
  • 1/4″ line outputs to connect to mixers, PA systems, etc.
  • Includes WU-BT01 Bluetooth MIDI/Audio adapter
  • Bright backlit LCD display with easy, intuitive interface
  • 800 AiX-powered Tones and 243 full accompaniment Rhythms
  • Advanced Tones (including vintage keyboards)
  • Splits and layers (Upper 1/2, Lower 1)
  • Powerful bass-reflex stereo speaker system with surround effect
  • Two 13cm by 6cm speakers, 2.5W per channel
  • Strap pins for playing anywhere
  • Class-compliant USB-MIDI connects to the free Casio Music Space iOS/Android app
  • Optional 6xAA battery power (AC adapter and music rest included)
  • 10 pounds (4.7kg)
  • $379.99 USD (street)

Available now!

Casio CT-S500 portable keyboard [Casio]

Quick reaction

Watching the Casio release video stream, the artist demonstrations are exciting. At these price points, Casio are going to sell a ton of these. I am so glad they included the “Advanced Tones”, that is, all the pianos, vintage keys and other instruments which created so much interest in the CT-S1. Hope they slash street prices on the CT-X series because the new S-series models blow them away.

Copyright © 2022 Paul J. Drongowski

Recent Casio patents (AiR/AiX)

Update: Here is the latest information about the CT-S500 and CT-S1000 from Casio.

After visiting the U.S. Patent and Trademark site, I normally do a deep dive into a few patents. Given the upcoming announcement of Casio’s new keyboards (Casio CT-S1000V and CT-S500), time is of the essence. Thus, here is a short list of the most relevant recent Casio patents:

11,094,307    8/17/2021  Sound generation 
10,937,404 3/ 2/2021 Sound generation, three contact switches
10,909,958 2/ 2/2021 Chord accompaniment
10,825,438 11/ 3/2020 Vocoder
10,825,434* 11/ 3/2020 Voice synthesis
10,825,433* 11/ 3/2020 Voice synthesis (MIDI)
10,810,981* 10/20/2020 Voice synthesis
10,803,844 10/13/2020 Picture/image generation in sync with music
10,789,922* 9/29/2020 Voice synthesis
10,629,179 4/21/2020 Voice synthesis
10,616,688 4/ 7/2020 Speaker box
10,559,290 2/11/2020 Waveform transfer
10,515,618* 12/24/2019 Waveform compression
10,490,172* 11/26/2019 Enlivement data (expression)
10,475,425* 11/12/2019 Waveform play-back and sound generation
10,474,387* 11/12/2019 Waveform transfer (ring buffering)

If you’re short on time, you might want to start with the starred (“*”) patents. Clearly, Casio have invested heavily in voice and instrument synthesis!

Of course, the usual caveats about patents and patent applications holds. Just because a company stakes out its intellectural property (IP) turf with a patent, does not mean they will build the technology into a finished product. Beware when drawing inferences!

A little background and context are needed. Please keep these points in mind when reading the Casio patents.

Casio have moved to a new generation of synthesis:

  • Acoustic and intelligent Resonator (AiR) sound source.
    • Multi-dimensional Morphing (changing volume and tone characteristics with variations in touch and passage of time).
    • Lossless audio compression.
    • Resonance system (string resonance, open string resonance, damper resonance, Aliquot resonance).
  • Acoustic and intelligent Xpression (AiX) sound source.
    • High performance DSP effects and EQ.
    • Higher waveform memory capacity (more waveforms, longer waveforms).
    • Amplifier and vintage effect modeling.

AiX evolved from AiR. AiR first appeared in Casio digital pianos. AiX first appeared in the CT-X series of portable keyboards. Both technologies are based on a new, proprietary, large scale integrated (LSI) processor. The Casio CT-S series, including the new models, exploits AiX technology.

Casio CT-S1 printed circuit board [Casio]

Casio have always relied upon a very high degree of functional integration. Previously, a wide range of products were based on the custom uPD800468P-012 processor. This processor was a sizable beast with 180 pins integrating major functions like digital-to-analog (DAC) and analog-to-digital conversion (ADC). The main clock ran at 48MHz. This may seem slow to people accustomed to personal computer technology, but the low clock speed is power efficient — small power supplies and/or battery operation and no fans or heat sinks. You don’t really want to lug around a PC power supply and all of its cooling elements, do you?

The uPD800468P-012 has been replaced by a new LSI processor with even more pins! The CT-S1 main board is positively sparse. Where did all of the other components go?

Slight digression. Casio and Yamaha are manufacturing juggernauts who slug it out in portable keyboards and digital pianos. Entry-level products are notoriously price-sensitive and both companies work hard to wring cost out of entry-level (and mid-range) products.

Casio ST-S1 speaker box [Casio]

Casio are pushing in other dimensions, not just LSI. With more waveform memory capacity, they have added “Advanced Tones” such as the new piano, clav, and organ samples in the popular CT-S1. They have also developed a horizontal bass-reflex speaker system for slim-line instruments. The system incorporates a new speaker box and elliptical speakers. Finally, Casio have developed their own low-latency Bluetooth audio and MIDI protocol.

For further information, I highly recommend the behind the scenes interview with the CT-S1 development team. Not only will you learn about the CT-S1, you’ll get a feeling for the “contact sport” of product engineering as the team try to balance conflicting design concerns.

[I hope that Casio don’t mind that I have reproduced a few of their pictures here.]

Copyright © 2022 Paul J. Drongowski

Casio CT-S1000V, anyone?

Update: Here is the latest information about the CT-S500 and CT-S1000 from Casio.

The forums are alive with rumors about the yet unannounced Casio CT-S1000V vocal synthesizer. Casio have posted a teaser video indicating a “January 2022” announcement date. I say “announcement” because the world-wide supply chain crisis will likely hold up deliveries.

As in the case of the rumored Yamaha PSR-EW425 (PSR-E473), enterprising souls have teased out pre-release images.

We do know that the CT-S1000V is based on Casio’s AiX synthesis technology. AiX is Casio’s latest generation of tone generation (large-scale integrated (LSI) circuitry). Their own teaser video has snippets of synthesized voice and/or vocoder. The teaser video is a flashdance by a four octave keyboard (pitch bend wheel and a few knobs.)

Casio CT-S1000V advertisement

The Guitar Center snap shows black and red models with oval-ish built-in speakers. There are two live control knobs along with the usual master volume and data wheel controls. There are five buttons below the display for navigating the menu system. The keys are squared-off, more like unweighted piano keys than synth keys. The GC text mentions portability, so I would expect battery operation as well as AC adapter.

The knob legends are different on the red model and the gray (black) model. This suggests two new models. Perhaps the red CT-S1000V has voice synthesis and the grey (CT-S500) is solely instrument synthesis?

Casio CT-S1000V panel

The second image has more detail. The assignable live control knobs to the left of the display are labeled “K1/VOCAL TYPE” and “K2/PORTAMENTO”. The vocal type sweeps between MALE and FEMALE. The tone mode select switches choose LYRICS and INSTRUMENT. There is some rhythm and record capability.

Intriguingly, the panel is is labeled “AiX sound source with vocal synthesis”. Coupled with “lyrics” and “vocalist,” one thinks of voice synthesis. Is this instrument Casio’s answer to Yamaha’s VKB-100 VOCALOIDâ„¢ keyboard?

Update: Casio have posted a new teaser video. Casio will be holding an event — CasioKeynote.com — on January 20, 2022 at 1PM EST. No, that’s not too early for me on the west coast, 10AM PST. 🙂

Counting keys in the new video, there must both 49- and 61-key models. If — if — the sound in the video is produced by the CT-S1000V in one pass, then it is capable of combining (playing) voice over music/rhythm parts.

There is also a new unofficial image showing the Casio CT-S1000V back panel. It’s blurry as heck, so have at it. The rear panel layout is very similar to the CT-S400. For that matter, the front panel has a similar flavor, too.

Casio CT-S1000V back panel

At least Casio aren’t waiting for Summer NAMM (June 3-5, 2022) to announce new product!

If you’re wondering about Casio’s recent R&D, please see my short list of recent Casio patents.

Interested in Vocaloid?

Copyright © 2022 Paul J. Drongowski