Yamaha's Latest Silent Brass
createdigitalmusic.com
createdigitalmusic.com
This page doesn't say anything about the back pressure from the mute. I wonder if it's any different from the original. I used the silent brass all through college and didn't have many opportunities to play without it, and frankly it screwed up my playing.
Here's a picture of the original from 1995 http://www.yamaha.com/design/award/images/img_sb-7.jpg
For myself, I'm practicing for pleasure and not to advance professionally. Muting my instrument would spoil it. Fortunately I've got a tolerant family and a detached house.
Sadly, that article is a few years out of date. Still, my big takeaway was that I would be willing to forego some attenuation and even cope with modest back pressure if the mute didn't mess with the tuning properties.
I've been pretty happy with the soft tone mute. It's pretty quiet (but louder than most), is better than many practice mutes for back pressure, and seems to have little impact on tuning. For reference, I'm playing a King 3b, no f attachment.
Maybe if I start spending more time with my horn again, I'll consider the silent brass as it seems pretty sweet for recording.
Watch this video: http://youtu.be/Hm-jX-rSKS8?t=2m4s
Around 2 minutes.
You'll see it being removed, how large it is in the instrument, as well as the reactions.
I did see a video for the sax case where a person had it mounted on some kind of stand, so that's probably a lot more feasible!
If you do find something promsing give me a buzz. I would be very grateful.
FYI, they have had "practice mutes" on the market for a very long time now! http://www.wwbw.com/Trumpet---Cornet-Mutes-Brass-Mutes,Mute-...