The complete “underwater portal” single in lossless audio formats like WAV, FLAC, OGG, AIF:
1. underwater portal (1st cologne chapter version 2023)
2. underwater portal (sirens calling version)
3. underwater portal (short dive)
4. birdhs space travel
The whole story of this release you can read on the songs web page:
www.airman.de/en/audio/underwater-portal/