Heath Eric Morris was sentenced by Justice Rachel Dunningham in the Christchurch High Court on Friday for murdering 20-year-old Oliver Johnston.
Four victim impact statements were read to the court by members of Johnston's family.
They spoke of Oliver's adventurous and friendly nature, as well as his musical talents.
He was a keen saxophone player and a self-taught pianist, family said.
One family member said Oliver "will be sadly missed by many people" while another said they missed him "more than words can express".
One family member was utterly heartbroken they could never hug Oliver again.
When sentencing Morris, Justice Dunningham took into account his youth and mental health issues.
Defence lawyer James Rapley QC spoke on behalf of Morris and said the 19-year-old was sorry for causing such extreme harm and loss.
