The attempt must come through use of the microphone in conjunction with the vocals of the participant(s).
Sound MUST be recorded.
Sound MUST include the voices of the participant(s).
Players must make a reasonable attempt at the lyrics. The referee is at liberty to disqualify an attempt if the lyrics are not attempted.
It is the responsibility of the submitter(s) to ensure that the volume of the game output does not adversely affect the microphone input (for example, don't blast the TV sound to get noise into the microphone nor have the microphone too close to the speakers). It is the responsibility of the submitter(s) to ensure microphone feedback does not occur. The referee is at liberty to disqualify an attempt if the scoring appears to occur in spite of what appears to have been the recorded input.