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Would it technically by possible to make a stainless steel tuba? How would this affect sound?

For the doublers out there: http://stashstainlessbass.com" target="_blank

If stainless steel is so hard to construct brass-type instruments from, how are the inner knucles/passage-tubing then mounted in stainless steel pistons as known from amongst other samples my British made (1999) Besson 981 Eb tuba?

Klaus

According to this link, Schilke compared trumpets made from various materials. The two extremes were lead (soft - no overtones, so it produced pure sine waves) and steel (hard - lots of overtones, rang when you tapped it, but "dead' when you tried to play it).

http://www.dallasmusic.org/schilke/Brass%20Clinic.html