Please record with headphones, don't record with the stereo on, and don't record the accompaniment in a dry voice.
3. Silence is forbidden where you don't sing! For example, don't mute the dry notes in the prelude and interlude, or you won't be able to collect your noise samples.
4. When recording, don't overload the sound. Someone asked what is overload? Overload means that your speakers will squeak and vibrate. Listen and see that the green tape (checkpoint) has turned red.