Mac

Playback and navigation
Start or pause playing Space bar
Start or stop editing Enter
Mute the sound (song keeps playing) M
Delete selection Delete
Stop playing selection Command + .
Go to the next or previous clip Right or Left Arrow, Up or Down Arrow
Increase or decrease the volume Command + Right or Left Arrow
Go to the next or previous song Command + Up Arrow or Down Arrow
Quit Superstring Command + Q
Close the Superstring window Command + W
Open the Info window for selection Command + I
Add songs to your Superstring library Command + O
Select all the songs in your Superstring library Command + A
Deselect a selection Command + Shift + A
Hide the Superstring window Command + H
Hide all other applications Option + Command + H
Editor
Zoom in Command + "+"
Zoom out Command + "-"
Actual size Command + 0
Edit the previous clip Shift + Tab
Edit the next clip Tab
Select all the clips Command + A
Deselect a selection Command + Shift + A
Move up or down selection 0.1 second Up or Down Arrow
Move up or down selection 1 second Shift + Up or Down Arrow
Change selection start time 0.1 second Option + Up or Down Arrow
Change selection start time 1 second Option + Shift + Up or Down Arrow
Change selection end time 0.1 second Command + Up or Down Arrow
Change selection end time 1 second Command + Shift + Up or Down Arrow
Insert clips above Command + Shift + I
Insert clips below Command + I
Distribute Command + D
Group selection Command + G
Ungroup selection Command + Shift + G
Cut selection Command + X
Copy selection Command + C
Paste selection Command + V
Delete selection Delete
Undo your last change Command + Z
Redo your last change Command + Shift + Z
Save Superstring data Command + S

Windows

Playback and navigation
Start or pause playing Space bar
Start or stop editing Enter
Mute the sound (song keeps playing) M
Delete selection Delete
Stop playing selection Control + .
Go to the start of the song Home
Go to the end of the song end
Go to the next or previous clip Right or Left Arrow, Up or Down Arrow
Go to the next or previous song Control + Right or Left Arrow
Quit Superstring Control + Q
Close the Superstring window Control + W
Open the Info window for selection Control + I
Add songs to your Superstring library Control + O
Select all the songs in your Superstring library Control + A
Deselect a selection Control + Shift + A
Editor
Zoom in Control + "+"
Zoom out Control + "-"
Actual size Control + 0
Edit the previous clip Shift + Tab
Edit the next clip Tab
Select all the clips Control + A
Deselect a selection Control + Shift + A
Move up or down selection 0.1 second Up or Down Arrow
Move up or down selection 1 second Shift + Up or Down Arrow
Change selection start time 0.1 second Alt + Up or Down Arrow
Change selection start time 1 second Alt + Shift + Up or Down Arrow
Change selection end time 0.1 second Control + Up or Down Arrow
Change selection end time 1 second Control + Shift + Up or Down Arrow
Insert clips above Control + Shift + I
Insert clips below Control + I
Distribute Control + D
Group selection Control + G
Ungroup selection Control + Shift + G
Cut selection Control + X
Copy selection Control + C
Paste selection Control + V
Delete selection Delete
Undo your last change Control + Z
Redo your last change Control + Y
Save Superstring data Control + S