Music 420A is about computational acoustic modeling for digital audio effects, sound synthesis, and signal processing for physical modeling in general. Topics addressed include finite difference methods, sampled traveling waves; acoustic simulation using delay lines, digital filters, and nonlinear elements; comb filters, allpass filters, and artificial reverberation; delay-line interpolation and sampling-rate conversion; phasing, flanging, and chorus effects; computational models of selected musical instruments; virtual analog modeling; and efficient finite difference schemes. Musical instruments considered include strings, winds, brasses, voice, and virtual analog circuits. Also listed as EE 367A.