This keyboard of 1997 (embossed case date) was the top of the line model of Casio's classic SA-series. While the sound set corresponds Casio SA-1, the  rhythm set and song bank rather resemble SA-35.

This instrument was later re-released as Casio SA-67 (with silver control panel and blue display frame).

main features:

• 37 midsize keys
• 2 built-in speakers (ca. 8cm, mono)
• main voice polyphony 4 notes
• 100 preset sounds (same sound names like Casio SA-1, selected by 2 digit numbers)
• 30 preset rhythms (selected by 2 digit numbers):
• rhythm {16 beat, 8 beat, pops, rock, swing, slow rock, shuffle, march, samba, waltz} (without accompaniment}
• free session {rap, pops, rock, jazz, house, funk, latin, carnival, country, classical} (with accompaniment in fixed- key, thus of little use)
• funny {cheer, fanfare, hopper, computer sound, horror, child's play, orient, jungle, accident, comedy} (fixed key accompaniment)
• cipher buttons {"0".."9"} to select preset sounds, rhythms & demos
• volume +/- buttons (5 steps, reduce bit resolution badly)
• tempo +/- buttons (16 steps)
• LCD display (shows parameters, metronome, currently played notes on their lines)
• wavetable sound generator with sounds based 2 mixed low- res loop samples with independent, partly very complex algorithmic volume and pitch envelopes.
• 10 demo melodies song bank (wonderful complex polyphonic orchestrations)
• "melody off" button (mutes the main voice of the demos to play to them)
• mulit-chip hardware:
• CPU= "OKI M6387B-A28, 904231A" (30 narrow pin DIL)
• LCD controller= "LC75821, 9CD1" (64 pin SMD)
• AC-adapter jack

eastereggs:

• 3 lower note keys addable.
• volume control setting changes tempo of algorithmic sound patterns (e.g. mandolin ring).

notes:

The preset sound set resembles very much the 100 ToneBank of Casio SA-1 (see there), but by the longer keyboard you can play 5 additional lower notes here. There are only few differences; e.g. the "metal guitar" and "metal lead" play a different chord. Also the split points of split sounds are different (to fit to the longer keyboard), and the pitch of some non- melodic sounds is different. A bit annoying is that the "sample percussion" (sort of gong with orchestral hit) plays here only on a fixed pitch, while on SA-1 many pitches (narrower than normal tone scale) were distributed over the keyboard. But in comparison to my Casio PA-31, most sounds on the SA-65 play a bit more sonorous, more open and clearer, while the PA-31 sounds more pale and muffled. Generally I like most of the SA-65 timbres better.

The rhythm set resembles much the Casio SA-35, but has a few additional rhythms. Unfortunately the accompaniments are still fixed- key and thus badly suited for melody play, but they can be inspiring for tekkno- like things. The new pattern "cheer" is a squarewave(?) organ fanfare loop (like from a historical videogame) while "accident" is a synth loop with ambulance siren and photo camera clicks.
 

The LCD shows 5 parameter values {volume, tempo, sound no., rhythm no., song no.} one at a time; an arrow indicates the parameter name. When you play notes, the LCD shows black dots on their note lines, which can be useful to learn which keys belong to which note pitches. When only naturals (white keys) are pressed, it displays their note dots simultaneously, while with sharps (black keys) it cycles through them alternatingly with about 2Hz by the lack of separate "b" and "#" symbols for the individual notes. It can only show black dots (like full notes) and not different note characters. During rhythm or demos a metronome with flashing notes and a walking dot row is displayed.

The instrument has a song bank of 10 wonderful orchestrated polyphonic demo melodies:

1. Ode to Joy
2. Twinkle Twinkle Little Star
3. Santa Lucia
4. Yankee Doodle
5. Minuet (J.S. Bach)
6. On the Bridge of Avignon
7. Silent Night
8. Aura Lee
9. Skaters Waltz
10. Little Brown Jug

A new case variant of this instrument was released as Casio SA-75 (different silver metallic case, same features, seen on eBay.) The case design of Casio SA-65 was blatantly imitated in the Jin Xin Toys JX-20165 and (less extreme) the Elecking - My Party Piano.
 

removal of these screws voids warranty...
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