currently, I am remixing a very old track (Datura - Devotion). Beside one female voice sample with a length around three seconds, the source of all the other sounds come from various hard- and software-synths. The notation of the bassline and one background loop is like on the original but based on my own MIDI-data with different sounds used there.
Do I need to ask the label where the original has been released for permission? It is for twisted sessions only.