I even used an old wind-up gramophone that I found in the garbage. They used to be in every school's audio-visual department for instructional presentations. Sometimes people will hear something, and they'll ask 'did you play this' when I actually didn't. It's interesting that audiences have this need to identify the source material. Once different unrelated records are combined, they sometimes have the power to trigger the memory of a tune.
Music has such powers in triggering memory, collective memory and private memory.
What I consciously try to do is to use the widest variety of music. These records often have different sets of references for different people, because most memories are personal and subjective. Whatever happens in their mind is something that I can't control, I can't control what they think about what I'm doing. It's like silent audience participation. A lot of your work has involved the destruction of records.