I experienced the same errors/issue while trying to implement Recorder.js in Meteor. After fiddling around with it a bit, I have Recorder.js working well in Meteor by performing the following steps:
Move the
recorderWorker.js
file to your apps/public
folder.Put your
recorder.js
file anywhere within your apps/client
folder.Open up your
recorder.js
file and edit theWORKER_PATH
variable tovar WORKER_PATH = '/recorderWorker.js';