The first time I was an Avel, I did not listen to any kinds of music. I found the year very, very difficult. Listening to (Jewish) music elevated my soul at the oddest times; cooking, driving, cleaning. I longed to listen.
The second time I was an Avel, I asked my Rav, he told me I could not listen to music, ie: instruments, BUT voices are not, strictly, music and I could listen to acapella voices, which I did. Listening to the voices my father loved, often brought me to tears and eventually peace.
It is not such a simple issue it deserves a serious conversation with your Rav.