Electronic musical instrument with automatic chord performance device

An electronic musical instrument with an automatic chord performance device comprising:

• a pattern generator including a memory for storing plural sets of automatic chord performance tone generating patterns for plural selectable rhythms, each set being for each respective rhythm, at least one set including a plurality of different automatic chord performance tone generating patterns, said at least one set of said different patterns being read out from said memory as chord tone generation timing signals for one selected rhythm,
• chord tone signal producing means for producing chord tone signals of a tone pitch relation constituting a chord to be played, and
• an envelope control circuit for controlling the amplitude envelope of said chord tone signals in said different patterns concurrently in response to the respective ones of said read out set of chord tone generation timing signals.

In an electronic musical instrument with an automatic chord performance device, the improvement comprising:

• tone generator means for generating a set of musical tone waveform signals constituting a chord,
• plural envelope control means each for imparting a common envelope shape to a set of musical tone waveform signals, said chord constituting a set of musical tone waveform signals from said tone generator means being supplied in parallel to each of said plural envelope control means for separate envelope shaping thereby, and
• pattern generator means for concurrently supplying plural different tone generation timing signals associated with a single, selectable rhythm, each of said plural timing signals being separately supplied to a respective one of said envelope control means to control the envelope shape imparted thereby, whereby there are produced plural sets of said chord constituting musical tone waveform signals each set having a separately imparted envelope shape associated with a respective one of said tone generation timing signals.