I think this slots in between Inga's time with The City Preachers and Frumpy. I dont know that much about it - If anyone does well, perhaps they will enlighten in the comments section. Certainly ID stood for Inga Dagmar. I have the German liner notes but cannot translate too well, perhaps one day I will ask my son. If you want they are on the Wikipedia page for this here:
It's full of Eastern sounding Folk Rock, sitars and psych sounds (On the Inga tracks). Electronics, Sitars, Eastern Rock Inga Rumpf and Dagmar Krasuse all mixed together to produce an experimental album. And it has the Avant Garde emergence for Dagmar on the flip.
Frank St. Peter: sax, flute
Hans Hartmann: Sitar, Kontrabass
Joe Nay: percussion
Wolfgang Kliegel: violin
Inga Rumpf: vocal
Dagmar Krause: vocal
Production by Eckhard Maronn and Michael Laukeninks.
Side Inga (all tracks written by Inga Rumpf)
1. Bhagavad Gita (2'49")
2. Bum - Bum (3'24")
3. I watched the women (2'30")
Side Dagmar (all tracks written by Dagmar Krause, Gerhard Arnoldi, Eckhard Maronn)
1. He's out now (2'44")
2. Dünne gläserne Frauen (2'13")
3. Schneeweiße Hände (2'20")
4. Schwarzes Insekt (2'09")
Inga and Dagmar had sung together with The City Preachers and this was a totally different direction for them both, Inga going on to a great career with both Frumpy and Atlantis whilst Dagmar did some great stuff with the likes of Slapp Happy, Henry Cow and the Art Bears.
I think you will agree that the two sides are very different and (certainly with Dagmar's tracks) are indications of the future styles both would eventually follow.