Sound recording copyright sign (U+2117) should not be in superscript
While the registered sign (U+00AE ®) is commonly used after a trademark in superscript, I think the sound recording copyright sign (U+2117 ℗) should be treated like the ordinary copyright sign (U+00A9 ©).
What do you think?
It seems that there's no clear standard regarding size & position of U+2117 (℗) and definitely not U+00AE (®). U+00A9 (©) is full cap size pretty much in all established fonts I've surveyed.
Here are a few samples:
I think this variance stems from a tension between practical use and technical/theoretical standards.
U+00AE (®) is almost always in superscript in practice, like with U+2122 (™), so it makes sense that some font designers choose to make it superscript by default (i.e. without sups feature enabled.)
U+2117 (℗) on the other hand seem to be used like U+00A9 (©), for example:
1394fc8216969b022dbc32f44d7578f0ecfd734b