Casio AP-21 Digital Piano Information, Specifications and Resources

Author: Andy Merrett / Data Driven

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Casio AP-21

Overview

The Casio AP-21 is a digital piano released in 1999. It is aimed at those primarily wanting a quality piano sound and keyboard feel.

The AP-21 has 88 fully weighted full sized keys with touch sensitivity but no aftertouch. It has 32 notes of polyphony, which is considered low for a modern digital piano but was common on older instruments with less advanced sound technology. It has eight on board sounds including pianos and real world sounds, and sustain/damper and soft pedals.

The AP-21 uses Casio's Advanced Audio Architecture sound system, offering layered and expanded tone generation.

It has the ability to record and play back user performances. It has built-in MIDI capabilities. It has no built-in learning system. It has a built-in amplifier and speakers. It runs from AC power.

It's a part of the AP family of instruments.

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Disclosure

Check out the latest Casio instruments on Amazon

As the Casio AP-21 is 27 years old, you may find used models and spare parts on ebay.

Specifications

Form

Number of Keys: 88
Key Weight: Piano
Key Size: Full
Touch Sensitive:
Aftertouch:

Sound

Number of Voices: 8
Polyphony: 32
Sound Generation: A2 Sound System
Piano Sounds:
Real World Sounds:
Sounds Editable:
Accompaniments:

Extra Features

Recorder/Sequencer:
Tutorials:

Communication

MIDI:
USB:
Tablet Connectivity:

Power

AC Power:
Batteries:

Audio

Speakers:
Audio Out:
Audio In:

Pedals

Sustain Pedal:
Soft Pedal:
Expression Pedal:

Release Info

Year: 1999
RRP: Unknown

Description

No further description available.

FAQ

What year was the Casio AP-21 launched?

This instrument was launched in 1999

What other models did Casio release in 1999?

What models did other manufacturers release in 1999?

What other digital pianos were released at a similar time?

Have your own question about the Casio AP-21? Email us and we'll research it for you.

Resources

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Reviews

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Purchase Links

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More Info

Added: 2026-02-10 Updated: 2026-02-13 ID: 1736

Instruments from 1998 Instruments from 1999 Instruments from 2000 Instruments from the 1990s
88 key instruments full sized key instruments Casio instruments
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