Sometimes when I listen very closely to music I sometimes hear slight crackling sounds in voices and some instruments a few times in songs. The crackling maybe lasts 0.1 seconds, if that. At first I thought maybe it was my setup - long optical cable to receiver, but after testing on other devices I found it is indeed in the music.
I thought maybe it was just the recording studios increasing the loudness of their music and maxing out the waveform, but I hear it even in "non-loud" albums such at Michael Jackson's 1987 Bad release. It is louder in the 2001 "loud" release, as expected.
Are the distortions coming from the recording studio room such as the microphone maxing out and distorting, or is there another problem at hand?
Listen for yourself:
Michael Jackson - Bad - Just Good Friends - Track 5
Audible distortion at 1:48 when Jackson says - "First impressions, I try to hide."
The words "I" and "hide" have a raspy tone or distortion to them but I don't feel that the sound is originating from Jackson's voicebox.
I can find more examples from other music if requested for people who don't have this album.