Roland FP-7 用户手册

 

Performing

“Feet” is a term that began as a measurement of the length of the pipes in a pipe organ.

The pipes that produce the basic pitch (fundamental) for each note are considered to be 
“8 feet” in length.

Therefore, a pipe producing a pitch one octave below that of the reference of 8' (eight 
feet) would be 16'; for one octave above the reference, the pipe would be 4', and to take 
the pitch up yet another octave it would be shortened to 2'.

The pitches of the harmonic bars are related as follows.

On tonewheel organs, the high-pitched footage for a portion of the high range, and the 
low-pitched footage for a portion of the low range are “folded-back” in units of one 
octave. 
Folding back the high-frequency portion prevents the high-frequency sounds from being 
unpleasantly shrill, and folding back the low-frequency portion prevents the sound from 
becoming “muddy.” 

On the FP-7 faithfully simulates this characteristic.

16'

8'

4'

2'

1'

5

1

/

3

'

2

2

/

3

'

1

3

/

5

'

1

1

/

3

'

one octave

below

5th

root

8th

12th

15th

17th

19th

22nd

8' =

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