I got hold of an old sony dat machine (tcd-d10 pro) and noticed a very interesting sound when i opened the door to the cassette compartment. The sound was recorded with an olympus ls-14 and was slightly edited in wavosaur.
Create beam 8 sound from huvaakoodia’s "laser one. Wav" sound (no have echo). Audacity:- cut from 0. 834s to 6. 085 (cut last part). - effect→fade out (0. 433s to 0. 834s).