Vulkan ( Volcano )
active from year 1963
rock band from Brno, founded by Ales Sigmund; well known thanks to joining the singing duo of Ulrych siblings, later Marta and Tena Elefteriadu. After 1970 performing as Ales Sigmund Band.
Members:
Zdenek Kluka (1963-1965)
Jan Hubacek (1963-1965)
Ales Sigmund (since 1963) , guitars, leader
Petr Ulrych (1964-1967)
Hana Ulrychova (since 1964)
Martha Elefteriadu (since 1966) , vocal
Tena Elefteriadu (since 1966) , vocal
Karel Antonin (1968-1969) , drums
Bedrich Crha (since 1968) , keyboards
Cyril Kajnar (since 1968) , bass guitar
Jiri Svoboda "Danny"
Discography:
compilations / live recs.:
Cestou k tichemu hlasu (Story 1964-1976) ( On The Way To Quiet Voice ) ( Ulrychovi, Hana a Petr ) , Supraphon 1991 , 
SP / EP:
Wine Of Love / Tam chtela bych byt ( Ulrych, Petr ) , Supraphon 1968
Vracim se cestou domu / Pojd, pujdem spolu ( Coming Back Home / Let's Go Together ) ( Ulrychovi, Hana a Petr ) , DIscant 1969
Pisen pro vas / Boure ( Martha a Tena Elefteriadu - Martha and Tena Elefteriadu ) , Panton 1970