Core SpecificationsKeyboard: 61 velocity and aftertouch-sensitive keys.Polyphony: 32-note polyphony.Sounds: 320 sounds/programs and 14 drum kits powered by 14 MB of PCM ROM.Effects: 2 stereo digital multi-effect systems with 47 effects.Styles & Arranger: 128 factory musical styles offering full backing tracks (drums, bass, and harmony parts that adapt to chords).Key FeaturesBacking Sequencer: A highly intuitive songwriting tool that lets you build a song fast using auto-accompaniment patterns, allowing for easy real-time chord progression and fill insertions.Floppy Disk Drive: Equipped with a 3.5-inch drive for loading Standard MIDI Files (SMF) and operating system updates.Hardware: Features a clear custom LCD screen, a dynamic pitch/modulation joystick, and onboard speaker system.Connectivity: Standard 5-pin MIDI In/Out/Thru, pedal inputs (damper, assignable), and Left/Right audio outputs.Weight & Dimensions: 12.9 kg (28 lbs); 1110 × 386 × 142 mm.Community Consensus & LegacyUsers on forums like Gearspace and Sonic State generally praise the iS40 for its premium, weighted-feel keyboard, expressive aftertouch, and surprisingly rich built-in sound quality. While some reviewers note the limitations of not being able to build custom styles directly on the keyboard (requiring an external converter if upgrading from older i-series models), it remains a highly robust, "plug-and-play" workstation for home and live use.