Does anyone know what the standard distance pad opening for c melody , (inches or milllimeters ) ? Same as the alto or more ? Thank You !
There is no "standard" that I am aware of. The only manufacturer that publishes recommended key openings for saxophones is Yamaha. When doing a repad or overhaul on a saxophone I use Yamaha's specs as a "starting point". Generally speaking the larger the tonehole, the larger the key opening. A review of the Yamaha specs for alto and tenor shows that the differences are not large---about 1mm for most keys.