Groovy server deafens itself to prevent itself from receiving your audio. This doesn't have any effect on the functionality of the bot and it can play music even if it is server deafened.
This significantly reduces Groovy's bandwidth usage (since we don't receive what you say in a voice channel), as well as Discord's bandwidth (as they don't need to send it).
This also protects your privacy, as we don't receive any audio from your voice channel.
If you are having trouble playing music, Groovy being deafened will not affect that. You may want to join our support server for assistance: https://groovy.bot/support