You could always play both bits of the tune in the high register.

Whilst you may not feel that it provides the differentiation between an A and B music you would like, at least you may be able to be heard.

But is that the point? If you are playing and contributing to the overall ambience of the session, does it matter that you are not coming over on an 'individual' level?

Obviously it does, or you wouldn't have asked, I suppose. There must be a difference between simply not being able to hear yourself above the rest in some sessions, contrasted with someone wanting to be identified or identifiable as an individual contributor.

I think this may be the philosophy of the arts rather than practical help!

Shoh slaynt,

Bobby Bob