The Browns Bay, Auckland man appeared at the North Shore District Court before Judge Simon Maude today, with several support people sitting in the public gallery.
His lawyer Hannah Hellyer said the man's life has changed significantly as a result of the court proceedings.
He has been undergoing rehabilitation that will continue in home detention, and his probation officer has assessed his reoffending risk will "continue to fall with treatment", she said.
An RNZ article in 2014 said Kusabs was a self-taught sound engineer who had worked with a long list of bands, forming the Auckland black metal band Vassafor in the mid-1990s.
Police have asked for the man to be added to the child sex offenders' register, which will be decided in June.