Avid Technology of Burlington sued a rival and former partner called Media Gobbler in federal court Tuesday, accusing the California company of "unfair competition in violation of federal law" and "tortious interference with the contractual obligations of four former Avid employees who are not employed by Media Gobbler." Avid alleges in its complaint that Media Gobbler had licensed technology from Avid properly but continued to use it inappropriately after Avid cancelled the arrangement.