3 of my least favourite sounds have been mentioned - bowed psaltry (I'll never be able to hear one again without hearing Kendall's slow motion rat fight!), hurdy-gurdy & scottish pipes indoors. I've heard both these in superb acoustic spaces & just had to leave.

Scottish pipes are one of my favourite instruments outdoors, after all my ancestors were Borderers. Altho they have Scottish names, Borderers fought both Scots & English indiscriminately! I assume that's why I love the sound of bagpipes outdoors, but I can't cope with a piper indoors, at least I can turn a recording down.

Northumbrian & other pipes are great indoors.

sandra