Sounds great, I have a similar setup (Slip On + MadDad) and sounds just about the same. The crackle and pop (in valves open mode) is intoxicating, you captured it well here! Enjoy!
PS: Did you do before and after dynoes? I did and will post results soon
2011 BMW E82 1///M: AW, ZPP+ZCV, HK, Apps; Akra CF+Valve control, MadDad mids, K&N, Forge FMIC, P3gauge, EuroTails, Tint, CF Mirrors+Spoiler+Roof+RevoZ diffuser, 10mm H&R, IND grills+gills, xCDV, LUX AE
2008 Audi B7 RS 4: Sprint Blue, Audi Exclusive Euro Interior, Premium+Titanium Package, EPL Tune, Stasis Ohlins MS coilovers, Milltek valved exhaust+DownPipes, Alcon BBK, Tint, ADR V1, Lidatek, Lamin-X, Strasse Forged SM7 3-piece concave wheels, 275/30/19 PSSs, Euro flat-bottom steering wheel, JHM SSK