Yamaha's Tyros4 arranger workstation keyboard features 61 keys and 128-note polyphony. The company's SA2 and Mega voices technology provide accompaniment styles while Super Articulation 2 makes for a realistic voice quality and SFF GE Styles provide guitar phrases. An audio recorder and player with integrated MP3 compatibility and a hard disk recorder allows users to record and play back music. The Tyros4 supports 16 tracks with a data capacity of approximately 300 kilobytes, an internal memory of 6 megabytes and a hard disk drive of 250 gigabytes. Musicians monitor the Tyros4's workstation via a 640-by-480 dot thin-film transistor color display and connect the product to other audio-visual devices via an RGB video output.
A Vocal Harmony 2 processing engine allows users to apply customizable harmonies to their singing voices as a Synth Vocoder option applies vocal synthesizer effects to music. Other Tyros4 effects include 44 reverb effects, 106 chorus effects, five compressor effects and multiple equalizers. From the keyboard, users access pitch bend and modulation controllers. The Yamaha Tyros4 goes online via Internet Direct Connection. Once online, musicians use Yamaha's service website to download premium voices, waves, styles and songs.
The Yamaha Tyros4 workstation supports over 1,800 voices in piano, strings, choir, brass, saxophone, guitar, percussion, organ and flute categories. When a voice is selected, the keyboard mimics the sound of a specific instrument. Built-in styles provide accompaniment and rhythmic backing across different musical genres. Five-hundred preset styles span pop and rock, ballad, rhythm and blues, world, Latin, dance and swing and jazz genres, encompassing sounds from surf music to gospel funk. Specialized movie and entertainer categories provide styles such as choral music and synth pop.