I don't play soprano very often but yesterday morning on the spur of the moment I took mine with me because I had to drive my wife to her job in a beach town near here and I've always thought it would be fun to practice along the beachside promenade looking out at the early morning Mediterranean. Early in the morning it's very quiet there with the only people being a small number of joggers, bikers and skaters. So after finding a good place to practice I pulled out the reed holder and discovered to my chagrin that I had grabbed an alto one by mistake. Not having any soprano reeds the choice was either not play or try playing with an alto reed instead. Since I had heard of people playing tenor reeds on alto, I figured it might work and anyway what did I have to lose?
I play a Yamaha 4C and surprisingly, even though the reed (a Java 2.5) hung down much lower on the shank and overlapped the rails, and the tip curve of the reed was not the same as the tip of the mpc, it played pretty decently. Maybe almost as good as the Vandoren sop reeds I have played. I play tenor most all the time so have never developed an embouchere or chops on sop that are worth mentioning, but nonetheless I was able to play from low Bb up to D3 quite easily with a decent tone and intonation that was only slightly off. I have a Conn Chu Berry straight sop and the intonation is pretty good for a vintage sax, and even with the bigger reed it was pretty decent and controllable.
Not that I think making a practice of it is a great idea, but next time I'm going to play both the alto reed and a soprano one to see how they compare.
Anyone else ever had a similar experience?