This question is an exact duplicate of:
- Effect of keys on modern performances 3 answers
I think I experience a different feeling to a song when it's played in a different key, which I think makes no sense, except that all frequencies will be higher or lower compared to the original key. I'm no expert when it comes to musical terms or the technical details of sound, but is there a relation, or do I falsly asume there is one? The relation between notes does not change in a different key, or does it?
To me a song written in a key containing flats is more "soft" or "gentle", songs with sharps feel more "bright". I'm not a native english speaker, so expressing the subtle differences is somewhat difficult.