Tonal improvisations 

Start: G Major
End: same

Start: C# Minor
End: C# Major

Start: Gb Major
End: same

Start: F Minor
End: F Major

Start: F Major
End: C diminished

Improvisations limited to a mode

Mode: A aeolian

Mode: B locrian

Mode: D dorian

Mode: A aeolian

Mode: pentatonic

Tonal improvisation with departures from tonality

Tonal Center(s): E

Tonal Center(s): G

Tonal Center(s): A

Tonal Center(s): D

Tonal Center(s): F

Non-Tonal Improvisations with the occasional referencing of tonality

Start pitches:
[D6;Eb6]
End pitches: [E8;F8;F#8]

Start pitches: [B5;G5;E5]
End pitches: [F#5;C#6;D#6]

Start pitches:
[F2;D6]
End pitches:
[A1]

Start pitches:
[D5;C6]
End pitches:
[B7;E8;A8]

Start pitches:
[A3;B3;G3]
End pitches:
[E7;C#8;G#8]

Start pitches:
[G2;G6;G5]
End pitches:
[G2;G3;C9;A1]

Non-Tonal Improvisations

Start pitches:
[F3;E4]
End pitches:
[A#5;B5;C6;C#6]

Start pitches:
[A4;A5;E6]
End pitches:
[C2;Eb2;B3;C3]

Start pitches:
[Eb5;A4;D4;Bb4]
End pitches:
[G#5;D6;E6;G6;A6]

Start pitches:
[G4;E4;F4;Ab4]
End pitches:
[D#4;C2;E4]

Start pitches:
[chr.cl.->C3;F#4;G#4]
End pitches:
[chr.cl + Bb6;Eb7]