🏷️ Basic Information Identification Make: Casio Model: CTK-431 Year: N/A (model specific) Generation: N/A (model specific) 📋 Manual Details Documentation Manual Type: Repair Manual Language: English Page Count: Varies by source (typically 50-150 pages) Format: PDF Availability Downloadable: Yes Purpose Intended Use: Repair, servicing, rebuilding, maintenance 📄 Keyboard Features Sound Generation Sampling Technology: AHL (Acoustic & Highly-expressive Large-waveform) Keys Key Count: 61 Key Action: Touch Sensitive Polyphony Max Polyphony: 32 Notes Tones Number Of Tones: 100 Rhythms Number Of Rhythms: 100 Songs Number Of Songs: 100 Sequencer Sequencer Tracks: 5 Effects Reverb Types: Yes (multiple) Chorus Types: Yes (multiple) Display Display Type: LCD Connectivity Midi Support: Yes (GM compatible) Usb Port: No Headphone Jack: Yes Power Power Supply: AC Adapter or Batteries Speakers Speaker Output Power: 2.5W + 2.5W Speaker Size: 12cm x 2 Learning Features Lesson Function: Yes Fingering Guide: Yes Performance Evaluation: Yes Other Features Auto Accompaniment: Yes Pitch Bend Wheel: Yes Transpose Function: Yes Tuning Control: Yes