4 Band Shifter

4 Band Shifter was developed to be a VST Plugin that is able to scale (shift) independently the pitch of 4 adjacent, user-definable frequency bands.
Short overview about the graphic components and knobs:
I. Pitch knobs
Each one of them controls the amount of pitch shift of the correspondent frequencyband. Pitch shifting range goes from -12 semitones, or an octave down, to +12 semitones, or an octave up. On the LCD, brighter band colors represent a positive shift in pitch, darker colors a negative one. Behaviour of pitch knobs is affected by the state of the discrete mode button (see below)
II. Volume knobs
Simple volume multipliers for each one of the bands. A value of 0 mutes the corresponding band, a value of 1 makes it sound full-volume, any value between the two lowers band amplitude proportionally. On the LCD, the height of a band represents its volume.
III. LCD Display
It gives graphic information about the plugin parameters: each band is represented by a rectangle. Width represents the frequency extension, height represents amplitude multiplier (set by the volume knobs) and band color represents the amount of positive (brighter) or negative (darker) pitch - shifting
IV. Band Endpoint knobs
These 4 knobs set the end point of the correspondent band: First band starts always at 0 Hz, and ends at band 1 knob value in Hz. Accordingly, band 2 starts at band 1 knob value, and ends at band 2 knob value etc. Upper bound for band end points is 20Khz.
V. Discrete/Continuous switch
When this button is turned on (bright red LED color), pitch shifting behaves "discretely", that is you can shift up or down the pitch only by multiples of one semitone in the range ±12. When it is turned off, knobs behave in a continuos way, meaning that you can shift up or down by fractions of semitone, obtaining a "slide" effect on pitch change.System requirementsVST Host