Changing the parameter-

Things that effect the volume either-
Makes the ocarina Louder (can also just be for the top/bottom of range)
Makes the ocarina Quieter (can also just be for the top/bottom of range)

Things that effect the pitch position-
Makes the ocarina higher pinched (range stays the same)
Makes the ocarina lower pitched (range stays the same)

Things that effect the pitch range-
Makes the ocarina have less of a range (pitch position stays the same)
Makes the ocarina have more of a range (pitch position stays the same)

Things that effect the timbre-
Makes the ocarina breathier
Makes the ocarina clearer

Things that effect total air use-
Makes the ocarina require more air to play
Makes the ocarina require less air to play

Windway-
Total length of windway
Width of windway
Height of windway
taper of windway (either height or width or both)

Windway opening into the voicing hole-
Shape of the exit of the windway into the voicing hole
taper of the exit of the windway into the voicing hole
Shape of chamber below windway opening
height of windway opening (to outside, or inside of the chamber)
angle of windway as compared to chamber

Labium and voicing-
Curvature of labium
slope of labium
shape of the labium edge (round, teardrop, rectangular, ect)
size of voicing hole