The current pre-release of the client ("pioneer" in the version) is only compatible to itself. So you can only play with other testers. Please be aware!
Could be the infamous sound bug. Try disabling and reenabling audio in bios settings or reinstall drivers:
https://forums.faforever.com/viewtopic.php?f=3&t=13623
This spreadsheet is called "interesting and beautiuf maps". Spreadsheet made by Robustness https://docs.google.com/spreadsheets/d/1c0Im5EEZmPcNdKy_a0aaMI0XE0HjKYBMU0tbi1GP6lE
