Tremolos on saxophone

Notice how much the effectiveness of the tremolo depends upon the fingering:

Pitches/intervals
Speeds
Listen
Eb3-Gb3/minor 3rd
Slow
Eb3-Ab3/perfect 4th
Fairly slow
Eb3-Bb3/perfect 5th
Fairly slow
Eb3-Bb3/perfect 5th
Fairly slow
Eb3-Cb3/minor 6th
Fairly slow
Db4-Fb4/minor 3rd
Fast
Db4-Gb4/perfect 4th
Fairly fast
F#4-A4/minor 3rd
Very fast
F#4-A#4/major 3rd
Fast

F#4-B4/perfect 4th

Fairly fast
B4-D5/minor 3rd
Fairly fast
B4-D#5/major 3rd
Fairly fast
E5-G5/minor 3rd
Very fast
B5-E5/perfect 4th
Awkward and slow