At A Glance

The CTK-900 includes 61 Full-Size keys, 32-Note Polyphony, 824 Tones, 160+16 Rhythms, 232 Digital Effects, DSP, General MIDI, 5-song/6-track Sequencer, Backlit LCD, Touch Sensitive, Internet Data Expansion Capability, Assignable Pedal Jack, ZPI sound Chip, Larger Internal memory, CD Rom Included.

Technical Specs

CTK-900 Technical Specifications
Keyboard 61 Standard-size keys, 5 Octaves with Touch Response (Off / 1 / 2 / 3)
Tones 332 Advanced Tones + 200 Preset Tones + 18 Drum Sets + 100 Standard User Tones + 20 User Tones with Waves* + 4 User Drum sets with Waves* + 50 Drawbar Organ Tones + 100 User Drawbar Organ Tones (824 Tones Total); Layer/Split
Polyphony 32 Notes Maximum (10 for Certain Tones)
Effects DSP (200 Types: internal, 100 user areas) + Reverb (16 Types) + Chorus (16 Types) + Equalizer (10 Types, 4 Bands)
Auto Accompaniment Rhythm Patterns 176 (Internal, 16 User Areas*)
Tempo Variable (226 Steps, ♩ = 30 to 255)
Chords 3 Fingering Methods (Casio Chord, Fingered, Full Range Chord)
Rhythm Controller Start/Stop, Intro/Ending 1 and 2, Variationl/Fill-In 1 and 2, Synchro/Fill-In Next
Accompaniment Volume 0 to 127 (128 Steps)
One Touch Presets Recalls setting for Tone, Tempo, Layer and Split
Auto Harmonize 10 Types: Automatic addition of notes that harmonize with melody note in accordance with specified Auto Accompaniment chords.
Memory Function Songs 5
Recording Tracks 6 (2 through 6 are melody tracks)
Recording Methods Real-time, Step
Memory Capacity Approximately 10,000 notes (Total for 5 Songs)
Edit Function Equipped
Demo Number of Tunes Song Bank/Sing Along: 50, Piano Bank: 50, Download Songs: Up to 5


Tune Number Name Composer Play Time
Street Beatz Steve Turner
Wind from the South Hage Software
Serendipity Waltz Tech-Note International Ltd.

Synthesizer Function Parameters Attack Time; Release Time; Resonance; Cutoff Frequency; Vibrato Type; Vibrato Delay; Vibrato Depth; Vibrato Rate; Octave Shift; Level; Touch Sense; Reverb Send; Chorus Send; DSP Line; DSP Type and DSP Parameter, DSP Level.
Registration Memory Number of Setups 32 (4 Setups x 8 Banks)
Memory Contents Tone, Rhythm, Tempo, Layer On/Off, Split On/Off, Split Point, Harmonize On/Off, Mixer Settings (Channels 1 to 10), Effect Settings, Touch Response Settings, Assignable Jack Setting, Transpose, Tuning, Accompaniment Volume Setting, Auto Harmonize Type, MODE Button Setting, Synchro Standy State, Mixer Hold, DSP Hold, Synthesizer Mode Parameters
Mixer Function Channels 16
Parameters Tone; Part On/Off; Volume; Pan Pot; Octave Shift; Coarse Tune; Fine Tune; Reverb Send; Chorus Send; DSP Line; DSP level; DSP Pan; DSP System Reverb Send; DSP System Chorus Send
MIDI 16 Multi-timbre Receive, GM Level 1 Standard
Other Functions Transpose 49 Steps (-24 Semitones to +24 Semitones)
Tuning Variable (A4= Approximately 440Hz 100 cents)
LCD Adjustable Contrast
SMF Player Flash Memory Storage for up to 200 files*
Support Format SMF0
Flash Memory Capacity 4MB
Shared Area Approximately 3.5MB (Waveform data, Accompaniment data, SMF data)
Further storage of waveform, accompaniment and SMF data becomes impossible after the total of such data reaches approximately 3.5MB.
Terminals MIDI Terminals In, Out
Sustain/Assignable Terminal Standard Jack (Sustain, Sostenuto, Soft, Rhythm Start/Stop)
Headphone/Output Terminal Stereo Standard Jack
Output Impedance: 140Ω
Output Voltage: 4.5V (RMS) MAX}
Power Supply Terminal 9V DC
Power Supply Dual Power Supply System
Batteries 6 D-Size Batteries
Battery Life Approximately 4 hours Continuous Operation on Manganese Batteries
AC Adaptor AD-5 (Optional)
Auto Power Off Turns Power Off Approximately 6 minutes after Last Key Operation. Enabled under Battery Power Only, can be Disabled Manually.
Speaker Output 3W + 3W
Power Consumption 9V - 7.7W
Dimensions 37 13/16 x 14 3/4 x 5 3/4 inches (96.0 x 37.5 x 14.6 cm)
Weight Approximately 12.3 lbs (5.6kg) without batteries

For unlimited possiblities Casio has created a brand new keyboard program where wave files can be downloaded directly onto a keyboard via a PC. The full program is available at music.casio.com as a free download. Using this software, new tones, tones with wave data, drum sets with wave data, rhythms, standard MIDI files, songs registrations and DSP settings can be loaded onto a PC, edited and eventually loaded directly into the keyboard. All you need to get started is to visit music.casio.com, download the Data Management Software and you can begin transferring to the keyboard, onto a SmartMedia Card or Floppy Disk via a PC. Let your creativity run wild, visit music.casio.com.

*The same memory area is used to store waveform data, accompaniment data and SMF data.

Technical Specifications Subject to Change

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