Tone information processing device for an electronic musical instrument for generating sounds

An electronic sound generation apparatus for an electronic sound system, comprising:

• converting means for sampling and converting a waveform signal into a digital signal representing the waveform signal;
• record memory means coupled to said converting means for recording said digital signal representing the waveform signal, wherein said record memory means includes a plurality of memory areas for storing a plurality of different digital signals in respective different memory areas;
• an input arranged to be coupled to an external pitch designating device for receiving an instruction from the external pitch designating device to read out said digital signal from said record memory means at a designated rate;
• an output arranged to be coupled to an external sound system;
• reading means for reading out the digital signal from the record memory means at said rate which is designated by the instruction received from the external pitch designating device to supply said digital signal to said output so as to generate a sound having a waveform and a designated pitch from said external sound system;
• selecting means for selecting one of the digital signals to be read out from a memory area of said record memory means;
• and
• manually operable means for causing said reading means to read out the digital signal at a predetermined pitch from said record memory means without receiving an instruction from said external pitch designating device, wherein said manually operable means includes check means for causing said reading means to read out one of the digital signals selected by said selecting means at a predetermined pitch from a memory area of said record memory means, so as to confirm that the waveform signal is correctly sampled in the record memory means.