Harmonix has shed 13 per cent of its workforce in order to stay on target and maintain its product development plans.
The cuts are said to have been made in its QA and administrative departments.
"We can confirm that 39 positions were eliminated today at Harmonix as part of re-structuring to better align our staffing to best suit our product development plans and schedules moving forward," a Harmonix spokesperson told IGN.
"Those affected were primarily in QA. The others affected ranged from administrative to other various roles within the company."