When using Imakuni?'s Doduo's "Harmonize" attack, can I just play a recording of a song?
You may have musical accompaniment as long as it is not disruptive, but you MUST actually sing the song. Lip-syncing and humming do not count.
Source: Evolutions FAQ (2016-11-03), TPCi Rules Team (2016-11-03)

Relevant cards

Note: All applicable cards may not be listed below.
XY12_112