Once you load a sample into a pad, you can use “replace sample” to browse folders for sounds. The pad gets updated once you select a sample in the explorer, however the replacement is not permanent until you click “OK”. “Cancel” reverts your choice to the previously loaded sample. There is also undo function inside GA4SE and A/B settings.
Learn GA4SE inside out - read the manual, read the tooltips. It’s one of best drum samplers out there - I’ve used Yamaha A4000, AKAI MPC 1000, Geist, FL Studio (edit: and Battery - no undo + sample replacement is permanent + no slicing = no go) - I prefer GA4SE by far. GA4SE is fast and easy to use once you know what is provided. When it’s in focus, it responds to key commands.
In the track inspector -> Create drum map from instrument (works with GA4SE)
in the drum editor :
choose “Show Drum Sounds in use by Instrument” and activate “Show Note Length”
use drumstick tool
ctrl+shift+click on a note or selected notes and drag up or down to adjust the velocity
ctrl+cursor L/R - moves selected note left or right by quantize value
It’s also useful to have keys assigned to quantize values - thanks to it switching between them is superfast.
GA4SE responds to Note Expression data, which means you can edit data of individual hits - unfortunately you need to use key editor to edit note expression data. It’s useful for setting filter cutoff or pitch of individual hits.
I find the drum editor superb and superior to beatdesigner.