Removing main vocals

I’m attempting to remove the bandwidths that contain the main voice and finding it extremely difficult to select the correct bandwidth to remove it. Can anyone help? The song is an old one from 1941 "I yi yi yi yi (Like you very much) by Carmen Miranda. Thanks

You cannot do it by bandwidth. Because of harmonics and overtones, most musical instruments and voices have similar bandwidths even when they’re playing different notes. This is the bandwidth of “G” three octaves down on the piano.

That’s one single note and it has overtones over most of the audible bandwidth.

You can try applying Effect > Vocal Removal, but there’s very little chance of that working because original recordings need to be in very high quality stereo, and the lead singer needs to be in the exact left-right middle of the show.