Casio CT-400 ToneBank Electronic Keyboard, circa 1990

A vintage Casio CT-400 ToneBank portable electronic keyboard. This instrument features 49 full-size keys and utilises Pulse Code Modulation (PCM) technology to deliver a comprehensive sound library. The interface includes a 100 Sound Tone Bank, 100 Rhythm Patterns, and 15 Demo Songs. Control features comprise sliders for Main Volume and Accompaniment Volume, a Mode selector (Normal, Casio Chord – Fingered/On), and dedicated buttons for Synchro/Fill-in, Start/Stop, Tempo adjustment, Chord Memory, and Tone/Beat selection via a numeric keypad. The unit is constructed from a durable moulded black plastic chassis with integrated stereo speakers protected by slotted grilles. The rear casing displays a large embossed Casio logo and houses the connection panel with a DC 9V power input and a standard output jack for headphones or external amplification. No serial number is visible; however, a small inventory sticker numbered 12471 is present on the lower-left rear.