| Acoustics of baroque, classical and modern flutes | 
| modern flute | multiphonic | 
|   | Fingering  Acoustic schematic  Non-specialist introduction 
  to acoustic impedance | 
This may be compared with the fingering for D5, but with two register holes. It also overblows to D6. It may also be considered as the fingering for C#5/6 with enough cross fingering to flatten them approximately a semitone and C#6 a little more. The 2nd, 4th, 1st and 3rd minima, respectively, correspond to these pitches.

Beats are possible.
 
 
   
 
   
 
   
 
   You can hear the multiphonic C#5 & 
  D5 
  played by Geoffrey Collins.
 
  You can hear the multiphonic C#5 & 
  D5 
  played by Geoffrey Collins. 

  Sound spectrum of a modern flute with a B foot played using fingering for the 
  multiphonic C#6 & D6.
 
 
   
 
   
 
   
 
   You can hear the multiphonic C#6 & D6 played by Geoffrey Collins.
 
  You can hear the multiphonic C#6 & D6 played by Geoffrey Collins. 
 may suggest other fingerings for this multiphonic.
 
may suggest other fingerings for this multiphonic.| Acoustic measurements are available for these flutes - modern B, modern C, classical C, classical D, classical flared, baroque Sound clips are available for modern B, classical flared and baroque | To compare flutes, it is easiest to open a separate browser window for each instrument. |