The Yamaha SYMPHONIC ENSEMBLE SK20 is an electronic instrument featuring three main sound sections: ORGAN, STRING, and POLY-SYNTH. The manual details how to operate the OUTPUT/PITCH blocks for volume control and tuning, as well as the VIBRATO/TREMOLO/ENSEMBLE effects.
The document explains the functions of the ORGAN block, including preset voices (ORGAN 1-3) and envelope controls like DECAY and SUSTAIN. It also covers the POLY-SYNTH block for synthesizer sound generation and provides a guide on connecting accessories such as foot switches and Leslie speaker systems.
The instrument automatically sets ORGAN 1, STRING 1, and POLY-SYNTH 1.
It must be ON to allow a signal at the rear panel output jacks; it can be OFF when using headphones.