AirSynth

C major
left hand · hold a gesture
Stride
(1 3) · low 5 — pop alt
Block
Hit on beats 1 & 3
Cascade
Chord · falling arp + low 5
Up Arp
1 3 5 1↑ — rising
Alberti
1 5 3 5 — classical broken
Hit
Chord stab · 5 3 fill
Bounce
1 5 1↑ 5 — bouncy bass
Down Arp
1↑ 5 3 1 — falling
right hand · point at a chord
I
C
C E G
ii
Dm
D F A
iii
Em
E G B
IV
F
F A C
V
G
G B D
vi
Am
A C E

Click Enable hand tracking (bottom-right) to start.
Right hand: point at a chord · Left hand: hold a gesture to choose the pattern