Update: The version of Pulse described here is included in BeOS 5. This tip remains for users of BeOS prior to R5.
Want more control over the Pulse utility? Be’s Daniel Switkin has hacked the default Pulse utility to include color preferences for the regular app, the standard Replicant version, and the Deskbar replicant version. This newsletter article tells the whole story, and includes a link to a new version of Pulse you can compile in the BeIDE (open the .proj file for your platform and pull down Project | Make, or tap Alt+M).
When the build is complete, you can replace the version of Pulse in /boot/beos/apps with the new one.

Initially, the interface won’t look any different. Right-click in any grey area to access the new options.