Musical note standardised at 440 Hz, lying in the octave containing notes from C (middle C) to B. The lowest note on most pianos is A, the highest C. The MIDI system for electronic musical instruments and computers uses a straight count starting with note 0 for C at 8.1758 Hz up to note 127 for G at 12,544 Hz. A written note can also have a note value, a code that determines the note's relative duration. In order of halving duration, they are: double note (breve); whole note (semibreve); half note (minim); quarter note (crotchet); eighth note (quaver); sixteenth note (semiquaver).;
Promissory note its debtors (called the "maker", "borrower" or "payor") to "accept" a promissory note, whereby the maker signs a legally binding agreement to honour the amount established in the promissory note (usually, part or all its debt) within the agreed period of time. The lender can then take the promissory note to a financial institution (usually a bank, albeit this could also be a private person, or another company), that will exchange the promissory note for cash; usually, the promissory note is cashed in for the amount established in the promissory note, less a small discount. Once the promissory note reaches