About the audio editor

A major complaint about Scratch 3.0 is that the rewritten sound editor has less features than that of Scratch 2.0.

I stole some code from Scratch 3.0's open source repositories: scratch-gui, scratch-audio, and maybe scratch-vm.

I also used some of their dependencies: wav-encoder, startaudiocontext, getFloatTimeDomainData, get-user-media-promise, and maybe one more but I don't remember. I also used lamejs for downloading as an MP3.

The editor source code is here.

Keyboard shortcuts

You have to be focused on a sound editor for these shortcuts to work. You can set the focus by clicking on the editor. The command key also works for the ctrl shortcuts.

space

play/stop

backspace or delete

delete

ctrl + A

select all

ctrl + X

cut

ctrl + C

copy

ctrl + V

paste

ctrl + Z

undo

ctrl + Y or ctrl + shift + Z

redo

ctrl + S

download as wav

ctrl + alt + S

download as mp3

left/right arrow key

move cursor/selection left/right

shift + left/right arrow key

select left/right

ctrl + left/right arrow key

go to beginning/end

ctrl + shift + left/right arrow key

select from beginning/to end