Re: [Harp-L] Re: Equal Temperament

["Doug" <mr4chnt@xxxxxxxxx>]

Hi David,

Remember that frequency of the upper ghost note is the sum of the frequencies of the two notes, and the difference is the lower ghost note.  

For middle C (261.63) combined with C one octave above (523.25) the upper ghost frequency is 784.88 which is close to the G at 783.99.  The corresponding lower ghost note is simply middle C again.

For middle C (261.63) combined with C two octaves above (1046.50)  the upper ghost frequency is 1308.13 which is close to the E at 1318.51.  The corresponding lower ghost frequency is 784.88 which is close to the G at 783.99, as noted above.

So the E would not come from playing hole 1 and 4, but from playing hole 1 and 7.

The frequencies mentioned here are based on A=440 and equal temperament.

BTW I'm a lot better with a spreadsheet than a harmonica!

Doug  H



  ----- Original Message ----- 
  From: David Fairweather 
  To: harp-l@xxxxxxxxxx 
  Sent: Monday, April 05, 2010 2:39 PM
  Subject: [Harp-L] Re: Equal Temperament


  (On a C harp) are you talking about playing the C at hole 1 blow together with the C at hole 7 in order to get a ghost note simulating the C at hole 4?

  Or did you really mean a "third" like an E?   Cause I don't understand how an E would be possible.


  > Second, if you play split interval octaves you get a third
  > IN TUNE 
  > difference tone or "ghost note" whether the harp is ET, JI
  > or 
  > compromise. 




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