I have recently moved in to a new flat, due to this I have had to consider my new neighbours when practising, so I bought a Denis Wick practise mute to keep the noise down. However, since this I have noticed that I am more prone to split and mis-pitch notes in band rehearsal! This is getting rather worrying as I'm sat on Solo Horn, and members of the band are noticing. I don't believe my technique has deteriorated, and it hasn't been a problem before (I have sat on this seat for 4 years and not suffered it previously!) and I'm also doing as much practise as ever, if not more. (although, previous practise was un-muted!) Has anyone experienced this problem before? if so what do people recommend? Is there a way I can practise, and keep the noise down???