There have been multiple accounts created with the sole purpose of posting advertisement posts or replies containing unsolicited advertising.
Accounts which solely post advertisements, or persistently post them may be terminated.
musicgraphic OP , 27 days ago Update. Made clearer white keys’ (semi)tonal steps and note order, enhanced procedure tables, made some small fixes.
Update. Made clearer white keys’ (semi)tonal steps and note order, enhanced procedure tables, made some small fixes.