How to join the other forums
It's simple, but it is rather hidden in the platform menus, hence this post.
From the top right menu, click on the [URL="http://www.effectivevolume.com/usercp.php"]Settings[/URL] link.
This is the User Control Panel.
Then, from the menu choices on your left vertical menu, choose [URL="http://www.effectivevolume.com/profile.php?do=editusergroups"]Permission Groups[/URL].
This is located under the My Settings / My Account section.
In the page that will appear, please choose the membership you are interested in and click "Join Groups".
This queues a join request to the relevant group/forum moderator.
Once approved, you can then access the relevant forum.