Musical sound signal generation device, musical sound signal generation method, and non-transitory computer-readable recording medium

A musical sound signal generation method comprising:

• connecting at least three fractional delay blocks each of which is connected to correspond to one of a plurality of delay units of a delay line and delays an input signal by a second delay length, equal to or less than a first delay length, respectively to a first delay unit which is the delay unit that generates a delay corresponding to a designated tone pitch among the plurality of delay units, a zeroth delay unit corresponding to a preceding stage of the first delay unit among the plurality of delay units, and a second delay unit corresponding to a subsequent stage of the first delay unit among the plurality of delay units, the plurality of delay units being connected in a cascade manner, and each delaying the input signal by the first delay length;
• and
• continuously connecting any one of the connected zeroth delay unit and the connected second delay unit to the fractional delay block and connecting at least any one of a new zeroth delay unit and a new second delay unit to at least any one of the fractional delay block other than the fractional delay block connected to a new first delay unit in response to setting any one of the connected zeroth delay unit and the connected second delay unit as the new first delay unit, setting a delay unit in a preceding stage of the new first delay unit as the new zeroth delay unit, and setting a delay unit in a subsequent stage of the new first delay unit as the new second delay unit in accordance with a change in the designated tone pitch.

A non-transitory computer-readable recording medium storing a program of system, wherein the program is configured to allow a computer in an electronic device:

• connecting at least three fractional delay blocks each of which is connected to correspond to one of a plurality of delay units of a delay line and delays an input signal by a second delay length, equal to or less than a first delay length, respectively to a first delay unit which is the delay unit that generates a delay corresponding to a designated tone pitch among the plurality of delay units, a zeroth delay unit corresponding to a preceding stage of the first delay unit among the plurality of delay units, and a second delay unit corresponding to a subsequent stage of the first delay unit among the plurality of delay units, the plurality of delay units being connected in a cascade manner, and each delaying the input signal by the first delay length;
• and
• continuously connecting any one of the connected zeroth delay unit and the connected second delay unit to the fractional delay block and connecting at least any one of a new zeroth delay unit and a new second delay unit to at least any one of the fractional delay block other than the fractional delay block connected to a new first delay unit in response to setting any one of the connected zeroth delay unit and the connected second delay unit as the new first delay unit, setting a delay unit in a preceding stage of the new first delay unit as the new zeroth delay unit, and setting a delay unit in a subsequent stage of the new first delay unit as the new second delay unit in accordance with a change in the designated tone pitch.