ELEC 484 Assignment 3


Part 1

Repeat the wah-wah filter from Assignment 2, but using the second order
bandpass filter on page 43 of the DAFX text (based on the allpass
filter on page 41).  Adjust the center frequency of the bandpass often
enough to make a smooth sound without transients.  Post the resulting
sound file and software on your website.

Part 2

Convolve about 5 seconds of the Tom's Diner .wav sound file with
a rhythmic pattern (made up from the given samples or your own sample),
and describe the result.
Post the resulting sound file, software and description on your website.
Repeat with the flute.wav sound file.

Part 3

For the FIR comb filter with delay M=4, starting with the difference equation,
derive the transfer function, find the poles and zeros and sketch them in the z plane,
plot the frequency response and the impulse response.

Repeat for the IIR comb filter with delay M=4.

Part 4

Implement and test both IIR and FIR comb filters with delays in the
range from 0 to 100 msec.  The sound effect will be different depending
on the delay.  Using the Tom's Diner.wav and the flute.wav sound sample, describe the sound
effect and the corresponding range of delays, and explain the result.
See Table 3.4 on page 71 for some ideas.
Post the resulting sound files and software on your website.

Part 5

Add a vibrato effect to a steady pitched sound (single instrument melody).
Post the resulting sound file and software on your website.