Abstract: The present invention may be used for producing vocal accompaniment with sound producing musical instruments. A hand operated unit may have a programmable processor, a display, a plurality of control switches and a control device. The hand operated unit may have a selection of human voiced letters in selected pitch and pronunciation characteristics stored in the programmable processor. An identification parameter correlated to a signal from a musical instrument that represents a sound produced by the use of the musical instrument may be stored with each selected human voice letter. When a selected human voice letter is activated, the hand operated unit may output a signal to a sound producing device. The hand operated unit may be connected to a foot operated unit that has multiple two-position foot switches and a pedal for use in control of pitch and sound level characteristics as well as selection of a human voice letter to be sound output.