How to play audio without being root (via sudo)?

Question

In order to play audio (espeak or aplay for example) I have to be root (via sudo). How can I do those as just a regular user? Is there a group I must be a member of or do I have to change some permissions somewhere? Thanks.

Answer 1

The user has to be in the audio group:

gpasswd -a [user] audio

Answer 2

have you tried:

adduser <username> audio

as suggested here, or:

usermod -a -G audio <username>

as suggested here.