Having once played the trumpet, this sounded interesting. I tried it on my old PSR-740 (more on that later, I just got it and, being my first decent keyboard am still learning my way around.) Layering the same trumpet voice yields - a trumpet voice! Maybe there's a little added chorus, but no mute was in the bell. There is a muted trumpet and it's passable - you could distinguish it from a string voice which is better than the 20 year old GEM I have.
Perhaps this phase issue began with the 2000/1000 or 3000/1500 models? A 'feature' of the newer AWM sampling? Anyway, I know where I can get ahold of a real trumpet and mute, should it ever be necessary. --<
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Kelly J
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Kelly J