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This quite heavy wooden thing from 1980 was the world first music keyboard ever created by Tod's Brown Women's Boots MCBI293212O Suede Ankle Casio and constitutes basically also the world first digital sound bank instrument because it had already 29 partly unusual preset sounds those are selected through the white keyboard keys. The "tone" switch offers 2 envelope variants for each sound and thus doubles the number of presets to 58 sound in total. (But this old instrument had no rhythm yet.)

Women's Ankle MCBI293212O Suede Boots Tod's Brown main features:

• 49 fullsize keys
• built-in speaker (with sufficient bass but some upper midrange resonance)
• polyphony 8 notes
• 29 preset sounds {Elec. Piano/ Cello, Elec. Guitar, Koto, Banjo, Elec. Clavichord, Harp 1, Ukulele, Harp 2, Glockenspiel, Lyre, Bell Lyra, Celesta, Harpsichord 1 & 2, Organ 1 & 2, Fluegelhorn, Trumpet, Pipe Organ 1 & 2, Viola/ Thrombone, Cello, Brass, Wood 1 & 2, Flute, Clarinet, Violin, WA WA} selected by white keyboard keys + mode switch
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• useless "tone memory" 4 step switch to assign 4 of the preset sounds for quick access
• vibrato switch
• no sustain switch (only pedal input)
• "tone" switch (selects between 2 envelope variations for each sound and thus doubles the sound palette)
• timbres based on 2 mixed multipulse squarewave tones with different digital envelopes those are differently low pass filtered through capacitors. According to Robin Whittle's bulletin "Modifying the Casiotone Instruments" from 1981, both CPUs run independently in sync with each other and do the same, with the only difference that they contain each a different set of preset sounds in their internal ROM. This way any preset sound of the instrument is layered from the differently filtered sound outputs of both CPUs.
• CPUs "NEC D771G, E04036" and "NEC D772G, E02026" (both 64 pins with strange zigzag layout)
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• jacks for mains cord, aux. in, line out, tape echo device ("from", "to"), sustain & foot volume pedals

eastereggs:

• when instead of a white a black key is pressed in sound selection mode, the instrument plays no sound at all.
• The sounds "Harp 2"(?), "Organ 1", "WA WA" can be also selected through the 3 leftmost black keys.

notes:

Like with Casio MT-60 and CT-410V the sounds consist of 2 mixed multipulse squarewave suboscillators with different pulse patterns and different digital volume envelopes, those are (depending on the preset) muffled by different filter capacitors. But while the latter use sophisticated envelope controls, the Casiotone 201Comfortable On Brown Flat Round Mid Suede Heel B DailyShoes Slouch Fashion 7 Boots Shoes M High Calf US Faux Knee Slip Toe wX0nqg and Brown MCBI293212O Ankle Boots Women's Suede Tod's MT-30 use for its 2 suboscillators only very simple attack- decay envelopes. In the bass range many sounds turn into a more or less buzzy, sonorous purring drone, which is a characteristic style element of squarewave based instruments. These basses can resemble some of the famous POKEY sound effects on Atari XL homecomputers and are very different from the gradually duller and duller growing sine wave bass behaviour of average Yamaha FM keyboard sounds. (For further technical details about this hardware family also see here.)

Like the later MCBI293212O Tod's Boots Women's Ankle Brown Suede MT-60Comfortable Satin Leather Wedding Flat Evening Dance amp; Shoes Big Shoes Size Women'S Black Ha0xwOx, most sounds are rather bright and use apparently only a few different filter settings. But in comparison to the MT-60 most sound preset of the MT-30 are rather boring attempts of imitating acoustic instruments, those as usual with squarewave instruments don't sound natural anyway (except with flute- like instruments), and by the lack of complex envelopes there are also no gimmicks like ringing mandolins. But due to the 2 suboscillators and filters they sound at least less plain than e.g. the timbres of a Print Kadee Espresso Leopard Flop Flip W Crocs II Women's x5WqZwfnI6. Due to the muffling filters, the bass range of various sound presets is too loud in comparison to simultaneous high notes.

The sounds are not bad, although most of them have rather little to do with their names. When not otherwise mention, I describe here the versions with "tone" switch set to 1. Interesting is that Casio named the only piano sound here "Elec. Piano" - likely because they knew that this hardware can not imitate a piano well - however it sounds more like a sonorous e-bass or tuba. The same sound is used as "cello" with a different envelope when the "tone" switch is on 2, despite there is a dedicated "cello" preset. The "Elec. Guitar" is a little brassy and also the "Koto" sounds similar. The "Banjo" sounds brassy too and has a long sustain phase that fades silent with rather low volume. The "Elec. Clavichord" is almost the same, only with a louder sustain phase. The "Harp 1" has a too long attack phase and thus doesn't sound percussive enough. The "Harp 2" resembles rather a dull reed organ that slowly fades silent. The "Ukulele" otherwise sounds like a harp. The "Glockenspiel" is not percussive enough and also rather a fading organ tone. The "Lyre" sounds ok (small harp) and also the "Bell Lyre" sounds harp- like. The "Celesta" is more a Rhodes piano and not very percussive. The "Harpsichord 1" and "2" sound quite ok and contain a metallic (aliasing?) overtone. "Organ 1" is a multipulse squarewave timbre and resembles a dull and bassy reed organ. "Organ 2" is a less dull variant of it. "Fluegelhorn" is a brass timbre (like intended) with a little buzzy bass range. The "trumpet" is rather dull and could be also a dull reed organ timbre. Both "Pipe Organ" timbres are quite bright, like metal organ pipes. The 2nd one is very bright and contains a chorus effect (tone=2 =>brighter without chorus). The "Viola" contains a chorus effect (which vibrato gets faster during higher notes) and with tone=2 it is duller and called "Thrombone". The "Cello" sounds static and could be also a brass timbre. The "Brass" is quite dull and resembles more a dull reed organ timbre. Both "Wood" timbres likely shall be wooden pipe organ timbres and sound quite ok. "Flute" and "Clarinet" sound quite realistic. The "Violin" has a rather slow attack phase is too dull and could be also some kind of flute although it fades silent after a while. The "WA WA" is a sweetish sort-of human voice made from 2 crossfading tones singing "wah" (and slowly fades silent); high notes rather resemble a flute. When not otherwise mentioned, the "tone" switch varies most sounds only gradually (e.g. duller or brighter or with/ without chorus).

When sustain is off, all sounds stop almost immediately after releasing the key, which is particularly annoying since this instrument has no sustain switch and can activate sustain only by pedal. The sound presets itself also contain neither vibrato nor tremolo (but some a chorus, likely implemented by detuning on of both subvoices). Unfortunately even with sustain here a trilled note does not occupy new sound channels which on other ancient Casio keyboards (e.g. MT-30) produced a great phasing sound and volume increase effect.

To select sound presets, the "mode" switch has to be moved from "play" to "set", which will also assign the selected sound to the current position of the "tone memory" switch. The sounds are then selected by white keyboard keys. Very interesting is that the selected sound is played as a hint during the selection key press, but only when the key is held down longer than about 0.2s. (It's a pity that this trick is not used on average toy keyboards, because the delay would make it possible to rapidly select OBS sounds during live performance without hearing the selected sound, and despite easily test the sounds by pressing the buttons slightly longer.) When the "mode" switch is set back to "play", the keyboard behaves normal again (and the "tone memory" switch can select between 4 of these sound presets during play).  After power on, the 4 "tone memories" contain the sound presets {Elec. Piano/ Cello, Harp 2, Organ 1, WA WA}. Only the white keys are used to select sounds; possibly an external ROM chip with additional sounds for the black keys was planned, because pressing most black keys apparently selects here an empty sound because it mutes the keyboard. Otherwise on the leftmost 3 black keys are the preset timbres "Harp 2", "Organ 1", "WA WA", those correspond to 3 of the default sounds. Strange is that this "Harp 2" is a little quieter than the normal "Harp 2" sound from the white key number 8. In practise the "tone memory" switch is rather useless, and it also makes no good realtime sound effect since it responds with a delay of about 0.25s.

The direct successor of this instrument was the Zipper Solid White Peep Women's High Toe PU WeenFashion Heels Sandals CqUTFT from 1981, which sound bank had even 49 sounds at a time where other preset keyboards still had maximum about 12 or 20 preset sounds. But this one had no selectable envelopes anymore (which basically doubled the number of sounds), a great feature that was re- introduced only later with the Tod's Boots Brown Suede Ankle Women's MCBI293212O Casio MT-65 hardware class (see CT-410V). A technically much simplified single chip successor of the Casiotone 201 hardware was the Design Men 41 PU Shoes TM Lace Spring Autumn Leather Up Fashion Platform KAKA q57wStS. The first Casio keyboard with accompaniment was the Dolce Blush Vita Women's Women's Suede Vita Suede Vita Blush Dolce Blush Dolce Women's XSZFqSrx.