Kraftklub is a German band whose music uses what type of expressionist vocal technique between singing and speaking where pitches are sung?
Kraftklub:  Their music combines rock / indie and Sprechgesang with German lyrics and is generally considered to be a mixture of rap and indie. Sprechgesang:  Though sometimes used interchangeably, "Sprechgesang" is directly related to the operatic "recitative" manner of singing (in which pitches are sung, but the articulation is rapid and loose like speech), whereas "Sprechstimme" is closer to speech itself (because it does not emphasise any particular pitches).
Sprechgesang