You should start by properly connecting MIDI cables between the sequencer and GR-1. Next, you will need to access the MIDI Out parameters in the SYSTEM menu and set them up to properly control your multitimbral Parts. Then, you will need to set-up the GR-1's sound module section by programming the MIDI Part parameters located in the RECORDER/PART menu. Finally, you will need to setup up the GR-1 to record a Patch.

When you first turn on the GR-1, you are playing what is called a Patch. A Patch is a combination of up to two smaller elements called Tones. The GR-1 has four multitimbral Parts for accompaniment applications, which means that you can have a bass Part, a piano Part, a string pad Part, and a rhythm Part played back at one time by the sequencer. The Parts of the GR-1 use Tones. You can then play a Patch live and record that performance into another track of your sequencer. This makes a total of 5 sounds that can be accessed through MIDI at the same time. Following this procedure will also allow you to monitor the performance you are recording on a sequencer more accurately, since you will hear all of the Parts played through MIDI while they are being recorded.