Jaani has also worked in the studio as a producer or guest musician with artists like Before the Dawn (band), Swallow The Sun, To/Die/For, Thunderstone, Wiidakko and Anna Eriksson.
Jaani také pracoval ve studiu jako producent nebo hostující muzikant s umělci jako jsou Before the Dawn, Swallow The Sun, To/Die/For, Thunderstone, Wiidakko a Anna Eriksson.