MIDI controllers allow you greater control over your software, enabling physical manipulation of software parameters, which you can customize to meet your requirements. This is particularly handy for Video-SL, especially if you don’t own a TTM57 SL mixer, which has assignable knobs, sliders, joysticks and buttons built in.
The following How-To will take you through the steps to map Video-SL’s functions to a generic MIDI controller.
Connection
The most common way to connect modern MIDI controllers is simply by using a single USB cable. (Most modern MIDI controllers have a USB port on them so no other connectors are required). If you are using an older MIDI controller however, you may find it only has a traditional 5 Pin DIN connection. In this case, you will need an additional MIDI - USB interface in order to connect to your computer.
Assignment
To enable MIDI assign mode, make sure you have the Video-SL window open in Scratch Live, then click the MIDI button (or ctrl + M). The Video SL MIDI assign panel should appear in place of the Video-SL interface.
To assign a MIDI control, click on the control in Video-SL, then move or tap the control on your MIDI controller. As you click each control you will see a dialog box which will prompt you move the MIDI control you wish to assign.
When you have successfully mapped each control the dialog box will turn from brown to green and the controller should respond to your touch.
To un-assign a MIDI control, click on the control in Scratch Live and press return on your computer keyboard.
You can choose to map controls to crossfade, load transitions, effects and so on. For a full desciption of the available controls for mapping, check out the Available Controls section of the Video-SL manual.