The title pretty much says it all: what is the English equivalent (if such exists) for "unsightly" when applied to sound?
"Ill-sounding" isn't as succinct and brings to mind the actual sounds of illness.
"Cacophonous" isn't as succinct and frankly requires knowing the word before understanding it.
Unaural or disaural aren't words, and require knowing that "aural" has to do with hearing anyway.
Is there a word for "unsightly" sound?