I havent used it or seen it in the forum, I thought that maybe it would be in someway useful to the audio guys. but does anyone know anything about brown bread? All i know is that it is like dynomat except better, My buddy from sc works for a place that uses it and they say it works great.

it works really well. actually anything that adds mass to your panels will work well in lowering the resonant frequencies of those panels. you can actually find a lot of good stuff on mcmaster.com for cheap, if you wanna make a dynamat equivalent DIY sound deadener

Yeah, i use the knock off stuff from McMaster Carr. If you need the part number theres a recent thread about it. Check there.