I am listening to music basically all the time. But I am not a big fan of using headphones while sitting at a table with other people. I understand that it can be helpful at live games but Im alittle oldschool and think its disrespectful.
Live... If the table is quite, however if we have a chatty cathy then I will listen for tells. Sometimes I'll have my earphones in and off or really low so I can hear the conversation and take down mental notes on various players and the hands they played.
When I play for a long time to regain concentration (usually at play in the tournament) has to include music! This is for me the most neutral way to get back in the game!
Online always. Every time i play poker online i have music on. No exemption. Live i never do it. Its more fun and easier to read someone when you speak with them at the table.
I used to play poker and listen to music, but then I realized that it distracted me from the game and did not allow me to concentrate. So I prefer playing poker in silence.
Music is always in a nice touch maybe a movie. if I was to choose music it would be in between led Zeppelin Frank Zappa Jimi Hendrix or course my band of choice manowar