I’ve been playing over 10 years on the Alto.
One thing i’ve noticed is lower strength reeds are harder to keep the HIGH notes in tune, they are very thin sounding and unsteady and continually go in an out of tune and its harder to play a steady strong long note.
I also have metal and non-metal mouthpieces. i’ve noticed that metal mouthpieces have a clearer pitch sound if thatʼs what you are aiming for.
Finally, my only advice is waste a lot of cash trying out different reed brands and reed sizes, until you find the type of reed that sounds the best on your mouthpiece – they do make a difference to your sound. Before you start frittering away large amounts of cash on different mouthpieces.
Look after the reeds and the mouthpieces will take care of them selves.
One other thing, get your saxophone serviced – i did and the it changed from a dull sounding instrument into clearer sounding instrument – i couldn’t believe the difference in having all the pads replaced with new pads.