Official foobar2000 IRC channel
Server: chat.freenode.net
Channel: #foobar2000
Or use Webchat: https://webchat.freenode.net/
Note: before you can join, you need to register your nickname. See https://freenode.net/kb/answer/registration for detailed info.
If you join #foobar2000, don't do this:
[15:09] * user (user@example.com) has joined #foobar2000
[15:10] <user> help
[15:11] * user (user@example.com) has left #foobar2000
Don't say "can anyone help" and wait for someone to react. Just join and ask your question. People will respond if they know the answer.
Note that most of the #foobar2000 regulars live in Europe, and while some of us tend to stay up much longer than we should, chances for an immediate response are lower during night time in Europe.