MATRIXSYNTH is a unique site in that what goes up is not only what the author of the site finds out there in the world of synths, but also what readers of the site find and send in. That said, there are guidelines as to what goes up.
MATRIXSYNTH is about individual synths - demos and synth spotting only - music showcasing the synths.
MATRIXSYNTH-B is auction overflow. Synths only. Email your auctions in!
MATRIXSYNTH-C is a paid music listings site for readers to promote their music.
The MATRIXSYNTH Lounge is a Facebook group where you can share anything including your music for free.
Posts on C are $5 via Paypal to email@example.com. You support the site, I support you. Posts on C go out on MATRIXSYNTH Twitter and Facebook and get linked on the right of MATRIXSYNTH.
To submit a post or if you have any questions, send email to firstname.lastname@example.org.