Hey! I still don’t have access to a computer, but I do have access to (potentially) valuable info pertaining to Touhou 6: Embodiment of Scarlet Devil’s OST! So I’m putting it here (sorry!)
I’ve determined which songs are detuned, and all key signatures! Songs with asterisks next to them are detuned, and are detuned by +10
A Dream More Scarlet than Red - B-flat minor
*A Soul as Scarlet as a Ground Cherry - C-sharp minor, E-minor
*Apparitions Stalk the Night - E-minor, A-minor
Sharp
Lunate Elf - D-minor, B-minor, potential quick change of D minor C-sharp minor D minor C-sharp minor (or as D-minor with a few sharps), C-minor
*Tomboyish Girl in Love - C-minor, E-flat minor
Shanghai Scarlet Teahouse ~ Chinese Tea - F-sharp minor
*Shanghai Alice of Meiji 17 - F-sharp minor, E-flat Minor
*Voile, the Magic Library - A-minor, either C-minor E-minor B-minor C-minor or C-minor with accidentals (twice)
*Locked Girl ~ The Girl’s Sealed Room - A-flat minor, F-sharp minor, A-flat minor, A-minor
*The Maid and the Pocket Watch of Blood - C-sharp minor, either F-minor with a change to D-minor mid-phrase or straight F-minor, E-minor
*Luna Clock ~ Luna Dial - C-minor, E-flat minor, G-minor, E-minor
The Young Decendant of Tepes - A-flat minor, B-minor, A-flat minor
*Septette for a Dead Princess - B-minor, D-minor, F-sharp minor
The Centennial Festival for Magical Girls - E-flat minor, G-minor (constantly swaps between the two)
*U.N. Owen Was Her? - B-flat minor, D-minor
An Eternity More Transient than Scarlet - E-minor
*Scarlet Tower ~ Eastern Dream... - F-sharp minor
Sorry for messy formatting, on mobile! I also checked this at my piano (which is electric, so i can change the pitch). Hope people find this information vital! (Plans to determine Dolls in Pseudo Paradise as well for the curious!)