Joel and Jeff think this site needs an expansion in scope to survive as discussed in:
They have proposed that merging it with Video and Film Production would make the site more general:
I do not believe that this will achieve the desired result of enlivening this community and creating a community for Film and Video Production. I believe that mixing a community of Audio Producers from the Music Industry with a group of Video and Film Producers from the Movie Industry will result in a divided community.
A divided community is a problem for two reasons: (1) Film and Video questions will be irrelevant to the Audio community and vice versa and (2) the Audio community will be split between "Audio for Music" and "Audio for Film" – therefore, for instance, questions about mastering will always need to be qualified as "mastering for film" or "mastering for music".
Then what should we do about the apparent failing of this website? I think that we should be patient. Audio Recording and Production is a huge field with a very rich and diverse set of online communities. TapeOp, DIYAudio, Electro-music, EM411, SOS, etc. – there are tens if not hundreds of highly active, long-standing audio production forums. It will take time for people to gravitate to a site like this when there are so many well-established alternatives.
If the site must be expanded, I would propose expanding it to encompass a broader range of topics related to audio production. The current title implies: Recording, Mixing, Editing, Mastering for music, but you could also attract people interested in Synthesis, DIY Audio, Sound Design, Field Recording, Electroacoustic ("Experimental") Music, etc.
However, instead of expanding it, I would suggest putting more effort into making it attractive to potential users. Advertise on other websites, allow users to create reviews of gear, partner with industry to do giveaways or organize group-buys, etc. Then be patient.