Electronic musical instrument using large-capacity recording med

Music – Instruments

Patent

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Details

84 118, 84 119, 364900, G10H 100

Patent

active

045080011

ABSTRACT:
An electronic musical instrument includes a keyboard having keys, an optical disc memory which is low-speed in access and very large in capacity, a semiconductor memory which is high-speed in access and very small in capacity, and readout circuit. The semiconductor memory stores an initial portion corresponding to a short period from the start of a tone waveshape. The optical disc memory stores a remaining portion succeeding the initial portion in the tone waveshape. The readout circuit starts to read out the initial portion and the remaining portion at the same time in response to a key depression. The short period is in advance determined so as to be equal to or longer than an access time required to read out the first data of the remaining portion. Therefore, the initial portion is firstly read out and thereafter the remaining portion is read out, so that the low-speed accessibility of the optical disc memory is compensated with the high-speed accessibility of the semiconductor memory.

REFERENCES:
patent: 3652776 (1972-03-01), Milde, Jr.
patent: 4383462 (1983-05-01), Nagai

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