In his last years these studio collaborations accounted for some decline in the quality of work.

After 2004, Stelzer performed less frequently, and concentrated instead on solo compositions and studio collaborations.

The varying quality of Birago's miniatures in this section is evidence of extensive studio collaboration.

Some studio collaborations on different projects also worked well, and last summer the two decided to make an album together.

This followed an earlier studio collaboration with Mitchell in Puppetmaster.

It was released in 1991 by Higher Octave, and is, as of 2011, their last studio collaboration as a duo.

Most of his work consisted of touring with top-tier acts and studio collaborations.

Since 2005 he has been involved with studio collaboration and production.

It was produced by John Cale, marking their first studio collaboration since The End in 1974.

The group was dissolved in January 2004 after the recording of their third and final studio collaboration.