Electronic musical instrument

An electronic musical instrument comprising:

• keyboard means having a plurality of keys;
• tone color selecting means for selecting a tone color among predetermined tone colors;
• tone signal generating means for generating, on a time division basis, musical tone signals corresponding to depressed keys among said plurality of keys, said musical tone signals collectively forming a periodic sequence of sampled values which occurs respectively, each said musical tone signal containing a fundamental component and harmonic components determined by the selected tone color;
• accumulating means connected to said tone signal generating means for accumulating the sampled values of said sequence and resetting the accumulated value to a predetermined value after outputting an accumulated musical tone signal represented by said accumulated value once per repetition of said sequence;
• digital filtering means connected to said accumulating means for imparting a fixed formant characteristic characterizing said selected tone color to said accumulated musical tone signal;
• and
• musical tone forming means for forming a musical tone in accordance with said accumulated musical tone signal.