Tone signal generation device

An electronic musical instrument comprising:

• keys for designating tone pitches of tones to be generated;
• depressed key detection means for detecting a depressed key or keys;
• waveshape memory means for storing respective waveshape sample data representing plural waveshapes, each of which contains plural periods and has a fixed number of samples, wherein the waveshapes are different from each other and form portions of a single tone to be produced;
• reading sequence control means for designating a waveshape to be read out from the waveshape memory means, and for sequentially switiching the waveshape to be read out;
• and
• reading means for sequentially reading from said waveshape memory means the waveshapes designated by said reading sequence control means in accordance with the tone pitch of the depressed key to form a tone ot the desired pitch comprised of the combination of the designated waveshapes.

A tone signal generation device comprising waveshape memory means for storing waveshape sample data representing plural waveshapes, each of which contains plural periods and has a fixed number of samples and which waveshapes have different forms, wherein the tone waveshape of a tone to be produced is constructed on the basis of said plural waveshapes;

• reading sequence control means for designating a waveshape to be read out from among said plural waveshapes in accordance with one of a predetermined order or at random;
• and
• reading means for reading out waveshape sample data corresponding to the designated waveshape once;
• said reading sequence control means further designating a next waveshape to be read out next from among said plural waveshapes in response to the readout of an immediately preceding designated waveshape and in accordance with said predetermined order or at random, said reading means further reading out waveshape data corresponding to the next and each subsequently designated waveshape data once so that said tone is constructed on the basis of the combination of said plural waveshapes.

An electornic musical instrument comprising:

• pitch designating means for designating a pitch of a tone to be produced;
• waveshape memory means storing waveshape sample data representing plural waveshapes, each of which contains plural periods and has a fixed number of samples and which waveshapes have different forms, wherein the tone waveshape of said tone to be produced is constructed on the basis of said plural waveshapes;
• reading sequence control means for designating a waveshape to be read out among said plural waveshapes in accordance with one of a predetermined order or at random;
• and
• reading means for reading from said waveshape memory means waveshape sample data corresponding to the designated waveshape once at a rate corresponding to said pitch;
• said reading sequence means further designating a next waveshape to be read out next from among said plural waveshapes in response tothe readout of the immediately preceding designated waveshape and in accordance with said predetermined order or at random, said reading means further reading out at said rate waveshape data corresponding to the next and each subsequently designated waveshape data once so that said tone waveshape is constructed on the basis of the combination of said plural waveshapes.

A tone signal generation device for forming a tone signal corresponding to a single note comprising:

• waveshape memory meas for storing waveshape sample data corresponding to plural different waveshapes, each of which contains plural periods and has a fixed number of samples and wherein said waveshapes form portions of a tone signal to be produced;
• reading sequence control means for indicating a sequence in which the waveshapes are to be read out, the sequence including at least some of the waveshpaes more than once alternating with other of the waveshapes;
• and
• reading means for reading the waveshape sample data from the memory means in accordance with the sequence to form a tone signal corresponding to a single note.