The phrase "aside from when" is correct and usable in written English.
It can be used to indicate exceptions or specific instances in which something does not apply.
Example: "Aside from when it rains, we usually have our meetings outside."
Alternatives: "except for when" or "other than when".
But we rarely talk about how architecture sounds, aside from when a building or room is noisy.
Jeter never had any problems, aside from when he was eighteen and went to A-ball and called his parents, homesick, crying".
But there aren't enough through balls from elsewhere, aside from when Francesco Totti has played – which Enrique doesn't seem to be particularly keen on.
Holt said that he had indeed never seen footage any of his mother's wins, and that he felt as if he was from "a normal tennis family" — aside from when he is asked about his mother at tournaments.
(Aside from when Ms Nyborg made a special effort to make the house and herself look pretty of course, proving that the statsminister's approach to candles and flowers is much the same as everyone else's: mainly for guests).
Aside from when evolution is popularized, the divulgation approach is lacking in didactic attention toward lay people.
Ravery said he was usually a very vocal viewer when watching Star Wars, knowing all the words after watching it "endless times", but said that aside from cheering when the credits opened, he intended on being "deathly silent".
The year-to-year decrease seen in 2012 was the largest one recorded, aside from 2009, when the economic recession caused a big drop in energy demand.
Aside from 2008, when he reached the final, many of Murray's exits looked like this one: full of dispirited play and games in which he looked as if he wanted to be just about anywhere else.
I've always found that question a tricky one to answer – aside from 2013, when his feats made "Bell's Ashes" a perfectly reasonable moniker for that strange series.
Aside from anything, when simply the idea that you 'should not eat' is driven into the psyche, (which is hard to get away from unless we move to a country where the body ideal is substantially larger; remember I said the body ideal, not the body reality), the urge to eat can become even more of an obsession and preoccupation.
