Silence can be art, but art is expressed on MB in the form of works not recordings.
According to the guidelines the following examples count as different recordings:
- Different performances
- Different sources
- Number of audio channels
Digital silence is still the same in stereo and mono, edits with just more or less silence in the end or beginning of the track don’t count as a new recording on MB, you can’t remix digital silence*, different sources of the same performed digital silence will obviously be different, but they won’t be digital silence anymore and the same goes for different performances.
*PS: Yes, of course you can put digital silence on a disc and scratch it on your DJ deck. The result will be a new (boring) recording, but you won’t have to clear a sample of someone else’s recording of digital silence, but can just use an empty disc. There can’t be a phonographic copyright on digital silence, because it’s not a recording.