RSZA paskened that classical music is permitted during sefirat haomer; my rav agrees.
Does your rav also agree to R’ Shlomo Zalman’s reluctance to apply this heter other than in a sha’as had’chak?
R’ Shlomo Zalman’s opinion is recorded in Halichos Shlomo, Moadim, 11th perek, 14, D’var Halachah 22. However, in Orchos Halacha 54, it is stipulated that this heter should only be utilized in case of need.