[awild]

Throw some reverb on the to be reversed recording for spooky premonitions

[kebman]

If you've got access to a mixer with a 1/4" tape recorder, try giving it a bit of feedback while recording and you get delicious analogue tape echo.

Edit: Just noticed that Hainbach has of course made THE video on tape echo. Check it out: https://www.youtube.com/watch?v=RYz2J4DmxVA