Francois Louis Ultimate Alto Sax S

I use these gigs on my alto and tenor saxes.... they do a great job at holding the reed on!

Does it change the sound? Probably not. Does it change the response? Possibly a little in the lower register. Does it stop the reed from coming away from the table as the reed swells with moisture (and thus prevents the possibility of chirps)? Definitely.

You may want to use a different mouthpiece cap though, as I've found the ones that come with these are a bit naff... they fall off all the time. I use Silverstein Omnicap II and these work very well!