This is my own collection of high quality early live and studio recording of Tangerine Dream.

Track Details:

Recorded as "The Tangerine Dream Band", for a German movie in 1969 - possibly from a TV broadcast?
1. "Underground" end titles - 1969 (2.33)

From a German FM broadcast of a 'live' (in studio?) 1970 performance
2. Ultima Thule improvisation - 1970 (7.59)

Ultima Thule single
This is an "official" release that is offered with the Japanese mini-LP pressing of Alpha Centauri, and to my knowledge, nowhere else. Side 'a' was previously found on the re-issue of Alpha Centauri as a bonus track, but here both sides of the single are pressed onto a 3" CD as part of the mini-LP CD.
3. Ultima Thule Teil 1 - 1971 (3.24)
4. Ultima Thule Teil 2 - 1971 (4.09)

The German 3 LP set Ossiach Live was the first record featuring various artists, that included a track by Tangerine Dream: Oszillator Planet Concert. This very first live recording of Tangerine Dream was never released on a regular TD record. This extremely rare sampler track is in excellent quality re-mastered from a cassette recording of mine recently discovered. The Tangerine Dream line-up in the tracklist features Peter Baumann with his full name: Hans Peter Baumann.
5. Oszillator Planet Concert (From Ossiach Live 1971 3LP) (8.04)

From an unreleased soundtrack from same-titled German movie broadcast on TV 25th April 1972
6. Geradeaus bis zum Morgen - 1972 (3.45)

Top Gear Session 29 October 1974:
This was their first British Radio Session for the Top Gear Radio show presented by John Peel. The three pieces here are also known as "Oedipus Tyrannus", and the quality here is absolutely awesome. When playing track two, the incredible deep sounds sent shivers running throughout the whole of my body. I had recorded this myself 30 years ago, but having lost my original recordings have managed to obtain this from a trader in Japan. I have since remastered the sound, reducing the slight hiss leaving an incredibly clear recording.

7. The Overture (5.58)
8. Zeus (11.00)
9. Boroque (6.13)

Further Reading:
For the Chichester Festival Theatre TD performed the accompanying music score for "Oedipus Tyrannus" with Keith Mitchell as Producer. The New Musical Express reported however that "the combination of classical tragedy and timeless Krautrockers did not work". A three-week tour followed in Great Britain in the autumn of 1974, on which their music was visually supported for the first time by a so-called 'Video Synthesizer'. The press called their concerts 'fascinating experiences' and the pop poll of the Melody Maker ranked them among "the most promising bands in the world". The distinguishing feature of their concerts at the time was that they mainly consisted of improvisations. They had set themselves the standard to never play the same piece twice.

The Overture that Tangerine Dream produced for the 1974 Chichester Festival production of Sophocles' great tragedy, Oedipus Tyrannus, is similarly suggestive of some of the more experimental Pink Floyd works, but it also carries some quite distinctive TD hallmarks. It is wonderful to have this great brooding masterpiece finally available to listen to!