"This is a bit irrelevant..."

Although this a bit OT for this forum i must tell you that it is relevant.

Enharmonics are important for the harmonical context as i wrote already in the readmore section of my OP.

"... a virtuoso violonist or cellist, or an opera singer, would consider them as equivalent and would play exactly the same tone."

Some do and some not ;-) You can count yourself lucky if you can listen to a string quartett that does this right.

A good explanation of the problem is Intonation und reine Stimmung, unfortunatly in german.

See especially the section about the implications of tuning the violin in pure perfect fifths. For this see also Syntonic comma.

This article might be also of interest, but be careful: "SuperCollider programming considered harmful".

Btw, many years ago i attended a lecture of Johannes Fritsch where he demonstrated some of this phenomenons on a self-made Polychord. Very instructive and impressive. He could even whistle intervals in different temperaments.

Edit: Fixed wrong term. Perfect isn't pure ;-)

Best regards, Karl