was a German builder of keyboard instruments
You could google this, but the ratio between frequencies of one octave to the next is 2:1
Answer:
1. When it is annoying and not enjoyable
2. When there is rhythm and a nice flow to the notes
3. Just an irritating sound or I try defining what the noise seems like some examples smash, screaming, etc
Explanation:
Not totally but in every place it changed so not sure bro