You didn't say how thick the brass is. I know brass foil works as an inclusion.
Roy Kapp of Delphi does a great class on metal inclusions in glass. I took it at this year's craft & bead expo in Las Vegas, and it covered a lot of different metals, including silver, gold, aluminum, and two thicknesses of brass foil. I highly recommend the class -- you get to see lots of samples and have the chance to make some projects of your own.
I used the time to do a bunch of 2-inch test tiles with various metal combinations. Here's a link to a photo of one of them, with copper leaf (which turns into transparent blue bubbles) layered over 44 gauge brass foil (left) and stainless steel foil (right). At some thicknesses, the brass foil makes dense bubbles on its surface.https://flic.kr/p/25BXWZY
These are sandwiched between two 3mm pieces of Tekta Bullseye glass and fired to full fuse.
As for the firing schedule, for foil you can use a standard full fuse schedule with a bubble squeeze to get the air away from the inclusion.
I really recommend Roy's class.