iTM does not require any kind of setup for operation in Garageband

Please remeber Garageband does make use of cc data,
so iTM Keys and iTM Matrix are the only current option

we will however investigate the possibility of a GB dedicated mixer app

Instructions:

Set up iTM operation as usual
(connect both devices to same network, start device app and computer app, both should communicate ok ;)

as Garageband does not have any kind of midi confiduration the only thing you need to do to get midi input from iTM apps is to record enable the desired track

Garageband track with rec disabled

Garageband track with rec enabled

Some user posted instructions on how to control Garageband transport with iTM with the help of GarageRemote