"En Rymd av Färg" is well-written and ditto arranged jazz music in the larger format with nice themes and sounds, fantastic performances and a voice "to die for". The songs were written with the big band members in mind. It is noticeable in the end result which is really good, modern big band music with sterling solos by, among others, Alberto Pinton on baritone saxophone, Christer Olofsson on trombone, magnificent Stefan Wingefors on piano and not least Karolina's sharpened soprano saxophone. More of this in the future thanks! "
 - Andreas Backelund LIRA 

As composers and soloists, the duo has collaborated with the professionel big band Bohuslän Big Band
It started in early 2015 when Bohuslän Big Band ordered music from the duo,  45 minutes from each sister.
This led to a tour in autumn 2015 and later on, another tour in spring 2017. The same spring they recorded an album together. ”En Rymd av Färg”  consists of music composed and arranged by the sisters and was released in September 2017 under the label Vara Konserthus.

In 2013 Sisters of Invention composed on commission by Norbottens Musiken, they wrote 60 min music for Arctic Youth Jazz Orchestra and went with on a tour in Scotland with them. In 2013 the sisters together with AYJO won a prize as "best big band" at Blue House Youth Jazz Festival in Stockholm.
"A different musical input, dynamic and well-played. Nice orchestral sound, good soloists and fantastic arrangements." Jury SM big band AYJO

The last time they performed their big band compositions was in the autumn of 2020. Then together with GUBB (Gävleborgs Ungdoms Big Band).