http://news.ycombinator.com/item?id=61831
http://news.ycombinator.com/item?id=132026
http://news.ycombinator.com/item?id=167076
http://news.ycombinator.com/item?id=367418
http://news.ycombinator.com/item?id=668087
http://news.ycombinator.com/item?id=716219
http://news.ycombinator.com/item?id=769769
http://news.ycombinator.com/item?id=1209378
http://news.ycombinator.com/item?id=1525445
http://news.ycombinator.com/item?id=1734122
http://news.ycombinator.com/item?id=1833040
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And again, from http://news.ycombinator.com/item?id=716262 - one of the many times this question has come up ...
None - I can't code while music is on. Ditto conversation, and ditto doing math.
There was something in PeopleWare (I think) about an experiment done with people listening to music. Those listening to their preferred music performed about as well as those who preferred silence and got it, and about as well as those who preferred music, but had silence. The group that preferred silence but had music performed, unsurprisingly, comparatively badly.
The sting in the tail was this. The task they were given had an "Aha!" insight buried in it. Namely, the full set of transforms they'd been asked to implement turned out to be trivial, although the individual components weren't.
All the programmers who had the "Aha!" moment had silence, regardless of their preference. No one with music saw the short cut.
I've since tried to find concrete evidence to support this anecdote, either papers, or first hand accounts, but the recounting in PeopleWare remains the only reference I have.
I'm the same way. I have to turn it off or it distracts me and breaks my focus.