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General| Number of Keys | 61 |
|---|---|
| Sound Sources | PCM |
| Rhythms | 100 |
| Effects | Reverb, Chorus |
| MIDI | Yes |
| Built-in Effects | Reverb, Chorus |
| Display | LCD |
| Type | Keyboard |
| Power Supply | AC Adaptor or Batteries |
| Polyphony | 12 |
Identifies all buttons, indicators, and ports on the keyboard for user reference.
Instructions for powering the unit with dry batteries, including installation.
Instructions for powering the unit with an AC adaptor and household current.
Critical information on adaptor usage, safety, and potential issues.
How to choose from 100 preset tones using numeric buttons.
How to choose from 100 auto-rhythm patterns using their numbers.
Learn melody by pressing the keys indicated by flashing lights.
Step-by-step guide for inserting a ROM pack into the compartment.
How to play chords using the simplified Casio chord system.
How to play chords using standard fingering techniques.
Step-by-step guide to find fingerings for specific chords like F#m7-5.
How to record chords in real-time, similar to a tape recorder.
How to record chords one-by-one using the Chord Form function.
How to play back the chords that have been recorded in memory.
Notes on memory limits, and the importance of power for data retention.
Lists common problems and their corresponding remedies for the keyboard.
Guidelines for avoiding damage, cleaning, and ensuring keyboard longevity.
Detailed specifications of the CT-840 keyboard, including model, keys, and power.
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