Glide Tone Sweeper

Glide Tone Sweeper

This module attempts to create a gliding tone effect by transforming a stepping frequency or octave signal, such as from a midi keyboard, into a smoothly changing signal. The transformations occur at the audio sample rate. The output will sweep toward the target tone until the target is reached or another tone step sets a new target.

To give the glide a smooth takeoff and landing a cosine transformation over the range of zero to pi radians is used (aka: zero and 180 degrees, the two points being where the cosine function has a slope of zero).


Input Signal Range Notes
Tmax any positive number This sets the maximum glide time
Input Signal Range Notes
step in any number This can be any stream of target frequency (or octave) values.


Output Signal Range Notes
tGlide any positive number This gives the currently set glide time value
Output Signal Range Notes
done zero or one Indicates the glide has completed (usually not needed)
Output Signal Range Notes
glide out any value This is the smoothed version of the stepped input stream.


Knob Function Notes
Glide time Knob Uses a logarithmic taper to allow a wide range with the same percent change in glide time as you turn the dial. The top, dead center setting of the knob gives a fairly common amount of glide. Note that a setting of zero to this knob results in a minimal 5-audio sample glide.

Version History

Revision Date Notes 5/12/21 Changes to improve performance and reduce glitches.

Glide Effect v21.05.04.01.audulus (31.8 KB)


Revision Date Notes
1 5/12/21 This demo uses the White-Key scale player and in-scale bend modules, both of which had to be upgraded to give glitch-free outputs in order to work with glide.

Glide Demo-whiteKey.audulus (684.0 KB)

1 Like

Just posted an update, and several other modules in the demo are updates. Their posts will get updated soon.