Click on the image below to hear waveform demos.
Waveforms in Music Synthesis Programs
There are other types of filters available on some programs/synths:
Low-pass filter-Filters out high frequencies and allows the lower frequencies to pass through.
High-pass filter - Allows the higher frequencies to pass through while blocking others.
Band-pass filter - Removes frequencies above and below the cutoff frequency-functions like a mid-range EQ on a mixer.
Notch Filter - Attenuates (eliminates/reduces) frequencies within a specific range centered around a frequency of maximum rejection.