What kind of writing is the passage above?

When a DJ plays two records at the same time and blends the records' beats to sound like one record, he or she is "beat mixing." To do this, the DJ must first know the records' tempos. If each record has a different tempo, the DJ will have to adjust the pitch of one or both of the records to bring the tempos closer together. Once the records' beats are playing at the same tempo, the DJ will need to get the records to play in sync. To do this, he or she will need to play one record over the other. While both records are playing, he or she can adjust one of the records so that its beat falls into the same pattern as the other record. After the DJ does this, he or she will need to continue adjusting the records; otherwise, they will fall out of sync.