Roland T-8 Owner's Manual page 14

Using the Rhythm Sequencer
Real-time input (tap input)
1. Press the [ó] (REC) button.
The [ó] (REC) button lights up.
2. Press the [ø] (PLAY) button.
The [ø] (PLAY) button lights, and recording begins.
3. Press an instrument button.
This inputs a note into the step during playback.
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