A FORMER music teacher at several Adelaide schools will be sentenced in court on Thursday for historical sex offences against a group of students.

The 49-year-old man has been found guilty of abusing four girls aged as young as 13 across three schools in the 1990s.

The court had previously heard how the trusted teacher groomed and then abused the victims.

The identity of the schools where the abuse took place has been withheld.

The offender’s name will be revealed in court on Thursday.