Buttons

Button Label Button Function
Play / Pause Start / stop sound

Sine Output pure sine wave

Saw Output saw tooth wave

Square Output square wave

Triangle Output triangular wave form

Play Spectrum Sonify spectrum (only available when not playing waveform)

Pitch Adjustment

You can change the frequency of the fundamental waveform by using the slider or by pressing the + (up a half step) or - (down a half step) keys. The keystroke commands are available unless focus is on one of the coefficient edit fields.

Hot Keys

Key	Function
+	Move pitch to the next half step above current pitch
-	Move to the next lower half step
n	Move to the nearest half step
s	Reduce volume -- softer
l (lower case L)	Louder

Half step definitions are predicated on multiplication by a factor of the twelth root of 2 and the A above middle C corresponding to 440Hz.

Coefficients

You can enter expressions as coefficients for each of the four supported waveforms. The coefficients can be expressions in the variables p and/or f. The variable f is defined to be the current frequency divided by 440, and p is defined to be the base 2 log of f.

Examples

To fade in discontinuities from, say, a saw tooth wave, at low frequencies, and replace with a sinusoid at high frequencies, try

Which Coefficient	Expression
Sine(t)	f^2/(1+f^2)
Saw(t)	1/(4+f^2)
SquareWave(t)	0.0
Triangle(t)	0.0

To Activate the Applet

Waveform Applet

Button Label	Button Function
Play / Pause	Start / stop sound
Sine	Output pure sine wave
Saw	Output saw tooth wave
Square	Output square wave
Triangle	Output triangular wave form
Play Spectrum	Sonify spectrum (only available when not playing waveform)