for a short time recording device
koeln salon e.v., cologne (photo: andreas wagner)
time-machine <--back plays upon the fact, that a certain amount of time is passing between each recording and its playback.
playback can be regarded as a travel back in time, trying to restore a past sound.
this aspect of every sound-recording is put into focus here by the visitors making short (max. 20 sec.) recordings of their voice or the surrounding sounds, writing down time and date and leaving it for someone later to listen and eventually exchange the sound for a new one.