| 摘要 |
PURPOSE: A device to synthesize instrumental sound in real time applies synthesized instrumental sound to various electronic instruments by combining calculation features of a countable synthesis method and advantages, and features of instrumental sound and synthesizing the instrumental sound in real time. CONSTITUTION: A plurality of frequency demultipliers (101-103,101a) produce the frequency of musical scale. When the output value of address counters (201-203,201a) is inputted as the address value, sine wave waveform memories (301-303,301a) digitizes the amplitude of sin wave and stores the same. Memories of sound loudness (401-403,401a) individually store the ratio of the waveform relative to the fundamental tone in the musical scale corresponding to a musical scale selected value, harmonics of fixed numbers, and non-harmonic tones. A plurality of multipliers (500) multiplies the ratio of the sine wave and the waveform by the fundamental tone and the harmonics of fixed numbers. A plurality of adders (600) repetitively adds the multiplied waveform by two in parallel. [Reference numerals] (101) Fundamental tone frequency demultiplier; (101a) Non-harmonics frequency demultiplier; (102) 2 harmonics frequency demultiplier; (103) 3 harmonics frequency demultiplier; (201,202,203,201a) Address counter; (301,302,303,301a) Sine wave waveform memory; (401) Fundamental tone size memory; (401a) Non-harmonics size memory; (402) 2 harmonics size memory; (403) 3 harmonics size memory; (AA,DD,GG,JJ) Main clock; (BB,EE,HH,KK,CC,FF,II,LL) Musical scale selection value |
