Is it Permissible to Listen to Music During the Three Weeks?

Hi, I wanted to know if it is permissible to listen to music during the Three Weeks. I heard from a colleague at work that according to Sephardic custom, one can listen to music until Rosh Chodesh Tammuz; is this correct? I would appreciate a quick response. It is difficult for me not to listen to music, and if there is a possibility of this being allowed, I would love to know. Thank you in advance.