Abwun - The Prayer of Jesus | 
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| a mantric oratorio by Christian Bollmann with the Overtonechoir based on melodies by Neil Douglas-Klotz (1997) | ||
Healing Buddha Oratory | 
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| Healing Buddha Oratory - a lovesong for Tibet (2008) concertante adaption of four central buddhism mantras as a sound ritual and meditation  | 
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Rise My Soul | 
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| a suite of eight contrasting compositions for choir and instruments. (1988) | ||
 Rise My Soul 
 
 and
 
SPIRIT COME | 
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| liturgical oratorio for Overtonechoir and instruments, (1992) a composition for instrumentation, which integrate archaic, responsorial shapes, different overtone singing technique and created vowel circle mantras Sai Ja Om.. | ||