Al,

My understanding with the C0, C1, etc., notation is that there is no standard. A person is free to define middle C however s/he wants. I believe that Sonar also define middle C as C5. A comparison that springs to mind is that the scientific scale for measuring temperature is Kelvin. That doesn't stop people from using Celsius, Centigrade or Fahrenheit, though.

The reason the print options are set to C4 (the octave below middle C) is so that notes below middle C will print on the lead sheet as treble clef using ledger lines rather. At least, that's my interpretation.

Below is an article about midi note numbers and how different manufacturers reference the numbering system differently.

http://tomscarff.110mb.com/midi_analyser/midi_note_numbers_for_octaves.htm

Regards,
Noel

MY SONGS...
Audiophile BIAB 2025