Inventronics SIGHT-O-TUNER II, Руководство по эксплуатации, Страница: 18 / 19

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CLASS C: Lower note is the reference note. If the beat rate between the test note and the upper
note is too slow as compared to the beat rate of the test note and the reference note, lower the
upper note . If the beat rate with the upper note is too fast, raise the upper note .
CLASS D: Upper note is the reference note. If the beat rate between the test note and the lower
note is too slow as compared to the beat rate of the test note and the reference note, lower the
lower note . If the beat rate with the lower note is too fast, raise the lower note .
The object in each case is to obtain an equal beat rate between the upper and lower notes of the
octave, and the test note. Each test is given a name corresponding to the intervals employed in the
test. In naming the intervals, "P" denotes a so-called "Perfect" interval, "M" denotes a "Major"
interval, "m" denotes a minor interval, "A" denotes an "Augmented" interval, and "d" denotes a
"diminished" interval. It must be noted that some of these intervals are very hard to hear in the
bass region of the piano. These checks, however, are still valid. To make use of these checks, hold
down one of the octave notes and the test note without playing them. (You may have to use the
sostenuto pedal in some cases). Play the strike note with a staccato blow. Repeat this procedure
with the other octave note and the test note. When the two beat rates are the same, the type of
octave, which has been tested for, will have been tuned. The strike note in all cases is the note
listed in the electronic setting instructions for that particular type of octave.
Octave Type Aural Tests Classifications
Electronic Setting
Instructions
Area Generally
Used
2:1
M10 - M17
P5 - P12
A
C
on the upper note Treble
4:2
M3 – M10
P4 – P5
A,B
C,D
octave above the
upper note
Midrange
6:3
m3 – M6
P12 – P5 B
B twelfth above the
upper note
Midrange,
Bass
8:4
m6 – M3
P11 – P4 B
D
two octaves above
the upper note
Low Bass
Medium Pianos
10:5
M6 – m3
A4 – d5
D
B
seventeenth above
the upper note
Lower bass
Large pianos
12:6
m10 – m3
P19 – P12
B
B nineteenth above
the upper note
Lower bass
Large pianos
4:1
M3 – M17
P4 – P12
A
C
on the upper note
Midrange,
Treble
8:2
m6 – M10
P11 – P5
B
D
octave above the
upper note
Bass
SIGHT-O-TUNER II SPECIFICATIONS
NOTE RANGE:
9 Octaves. C1 through B 9 (A4 = 440.00 Hz).
CENTS RANGE:
±62.5 cents with ±0.1 cents accuracy throughout the scale.
CALIBRATION ACCURACY:
Built-in 440.00 Hz crystal frequency standard for self-calibration, accurate to ±0.1 cents.
DISPLAYS:
Rotating light-emitting-diode (LED) display for continuous analog FLAT or SHARP tuning indicator.
Separate LED wide-range sharp/flat indicator.