Sound garbled when I play an iTunes recording

Hello friends,   We have a weekly meditation group on zoom.    I used to be able to play a recording of a guided meditation from my iTunes collection, but now when I try to play it - it sounds garbled to everyone on zoom but me. To me it sounds clear.  Before the meeting, I do go to Share, Advanced and Share Computer sound as I always did, but seem to be having no luck now.   I am wondering if perhaps I need to change something in the settings?  I do have Original Sound for musicians activated when I try to ring the bell, but always turn it off before the recording.   I would appreciate anyone's ideas.   Thanks    River  (Peggy Hamill)