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Synth MIDI Note
This selects the MIDI note number, which you can use here as a frequency control with the sound card's built-in synthesizer. MIDI Notes are numbered 0-127, where 69 is 440.000 Hz ("Concert A"). The current note name and frequency are shown above the MIDI Note control.
Please note: Percussion mode is active when Synth MIDI Voice is set to 128. The MIDI Note control becomes a selector for General MIDI Percussion Sounds. These are non-tonal and don't have a particular "note" or frequency, so the name of the selected percussion instrument is shown there instead.
The Standard Musical Note Frequencies section has a list of key names, MIDI note numbers, and frequencies that covers the standard piano keyboard range.
You can compute the frequency of any MIDI note N from
Freq = 440 * 2^((N - 69) / 12).
See also Synthesizer Control Dialog.
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