DSP Term Project By: Ashley Downs And Jeff Malen By: Ashley Downs And Jeff Malen

Sound Effects  Delay  Multiple Echoes  Natural Reverb  Flanging  Delay  Multiple Echoes  Natural Reverb  Flanging

Delay  Delay takes an audio signal and plays it back after the delay time (several milliseconds to several seconds).

Sound Files for Delay  Input Sound  Output Sound  Input Sound  Output Sound

Multiple Echo Filter  H(z)= Z^-R.  (1- alpha * (Z^-R))  H(z)= Z^-R.  (1- alpha * (Z^-R))

Impulse Response of a Multi Echo Filter

Sound Files for Multiple Echo Filter  Input Sound  Output Sound  Input Sound  Output Sound

Reverberation  Reverberation is the result of many reflections of a sound that occur in a particular space.

Natural Reverberator  The Schroeder’s Reverberator  Combination of 4 Comb and 2 All Pass.  The Schroeder’s Reverberator  Combination of 4 Comb and 2 All Pass.

Sound Files for Natural Reverberator  Input Sound  Output Sound  Input Sound  Output Sound

Flanging  H(z)= (1+ alpha*(Z^-beta(n)))

A Time Varying Delay Function

Sound Files for Flange Effect  Input Sound  Output Sound  Input Sound  Output Sound

That’s All Folks!