C4 thoughts: I want the C4 to be "Chanel" (a fashion house with one of their products being jewelry, which includes rings) manipulated somehow to become "Charnel", which is short for "charnel house", which is a type of sepulcher. That would imply "is buried e.g. in" somehow clues R in the middle, but I don't see how.

(I don't think buried can be a homophone of some sort either, since "Chanel" and "charnel" are pronounced differently)

i think "buried, e.g." must be a unit... something like DUG or HID, maybe

TARREGA seems so near yet so far. Francisco Tárrega was a Spanish composer & guitarist who composed the piece named "Gran Vals", a sample of which was used as the ringtone (which may also be called a "ring") of Nokia phones. It's also EG buried in TARRA but Wiktionary tells me that's not used in English. "Terra" would be fine since that's used in English and means "land", which has definitely acted throughout history until now as a sepulcher... except that would yield "Terrega", not "Tarrega".

That name is certainly a good fit for "composer of ring" and EG.

Yeah it is

But perhaps it's the other way round TARR(eg)A + IS/IN makes a sepulchre? (Well, it doesn't.)

Hmm that's actually possible yeah

But yeah I don't see it either... yet

(And could be a totally different composer of a ringtone altogether)

When I search for "composer of ring...", I'm offered "... ringtone" and "... ringtone nokia" as popular options. I can totally see how msh210 folllowed that path when trying to milk the "composer of Ring" theme a bit more.

C4 hint: A few relevant ideas have been raised in chat, but ringtones are unrelated.

Hmm

74+12=86(12*8-10);17+12=29(13*3-10);33+12=45(14*3+3)
75+13=88(14*7-10);81+13=94(13*9-10);42+13=55(12*5-5)

44+14=58(12*6+((-10)+(-10));33+14=47(13*9+((-10)+(-10));22+14=36(14*2+(-5)-(+3))

@ParclyTaxel this is where I got to

theres some sort of pattern

puzzling.stackexchange.com/review/close/53457