Rap Attack

2Microphone not allowed yet

Tap Allow microphone. Your browser will ask permission, then you can pick which mic to use.

3Calibrate delay estimated

Phones hear and record with a small delay. Take headphones off, set volume to about half, hold the phone still, and tap Calibrate. You'll hear 8 clicks.

4Lyrics

5Record

• Use wired headphones. Bluetooth adds delay the calibration can't measure.
• Tap 1: the beat starts after one bar of clicks. Find your flow.
• Tap 2: recording starts on the next bar.
• Tap 3: stop.