Sound, Waveform,Noise

Period and frequency—four pitches are heard arpeggiating a major chord. Notice the inverse relation between the period and the frequency. As the frequency (pitch) goes up, the period gets shorter.
Infrasonic to sonic—A series of clicks that speed up until they become a single glissandoing pitch. Starts at about 2 Hz (infrasonic) and ends at about 185 Hz (in our hearing range). The voice-like sound at the end is the result of the quality of the clicks—the clicks never change, they just get faster and faster.
Endless downward glissando with spectrum video— related to Shepard Tones sine waves in may octaves glissando downward. Gradually the loudest sine wave fades and the octave above it gets louder causing us to shift our focus to that sine wave. The process can continue indefinitely (this one goes on for two minutes).

Bach on a sine wave—the waveform will play on one pitch for a couple of seconds and then you'll hear an excerpt from Bach's Invention No. 1 using this timbre.
Bach on a triangle wave
Bach on a square wave
Bach on a pulse wave
Bach on a sawtooth wave
Bach on white noise—since noise has no real pitch, you'll hear the rhythm of the Bach, but no the pitches.
Bach on pink noise—since noise has no real pitch, you'll hear the rhythm of the Bach, but no the pitches.
Bach on filtered noise bands—here the noise is filtered to emphasize the frequencies corresonding to the pitches in the Bach so you'll hear the melody here
Reason file for waveform demonstrations—a simple Reason file using the Thor synthesizer