When you want to delete a channel in iDrum, you can use the 'Delete Channel' button or the 'Delete Selected Channel' contextual menu item.
1. Select the channel you want to delete and click on the 'Delete Channel' button
in the Master Section.
1. Ctrl-Click or click with the right mouse button anywhere in iDrum's window to bring up
iDrum's contextual menu.
2. Select the 'Delete Selected Channel' menu item.