Petr "Macp" Trpak, guitarist, bassist, percussionist, percussion programmer, trumpeter, vocalist and composer of industrial music and industrial hardcore, worked in bands Veselí Filištínové, Střední Evropa, Karel Gott Revival and M.A.C. OF MAD.
APPEARANCES +
L.Amat* Et Les Musiciens
L'Amateur De La Vie
1996, CD, Album, Wolf Records (4), 
,
, Experimental
Various
Creations From A Morbid Society
1996, ,
, Thrash/Black Metal/Death Metal
Viklický* vs. Švamberk*
Last Connection From Nirasaki
1995, ,
, Vocal
Odvážná Srdce / Beatové Družstvo
Odvážná Srdce / Beatové Družstvo
1991, 7", Mrs. Levi B, Datart, Unijazz, ,
, Alternative Rock/New Wave
Odvážná Srdce / Brusičova Parta
Zvířátka / Uragán Světem Burácí
1989, Cass, C90, Not On Label, ,
, Experimental
Various
C'Est (19)90
1990, Cass, Comp, C90, Corrosive Tapes, 
,
, Alternative Rock/Experimental
Various
Informátor 00II
1989, Cass, Comp, C90, Not On Label, ,
, Alternative Rock/Noise/Experimental/Industrial
