yed,
     but changes the "remembered" note - it can be thought of as a
     parameter to this effect. Sliding to a note is similar to effects
     [1] and [2], but the slide will not go beyond the given period, and
     the direction is implied by that period. If x and y are both 0,
     then the old slide will continue.

[4]: Vibrato
     Where [4][x][y] means "oscillate the sample pitch using a
     particular waveform with amplitude y/16 semitones, such that (x *
     ticks)/64 cycles occur in the divis