User Manual
Table Of Contents
- PRECAUTIONS
- NOTICE
- Information
- Introduction
- Included Accessories
- About this Manual
- Contents
- Component Names
- Setting Up
- Screen Configuration and Basic Operation
- Producing Reference Tones for Playing Harmony (Voice, Temperament, Hold, Octave, Transpose)
- Demonstrating Tempo and Rhythm (Metronome, Rhythm Style)
- Sharing Performances (Recording/Playback)
- Enhancing Basic Practice (Sound Back, Training)
- Restoring Factory Settings
- Advanced Settings (Settings)
- Connecting External Devices
- Connecting Amplifiers or Other Equipment (OUTPUT [L/MONO], [R] jacks)
- Connecting a Microphone (MIC [INPUT] jack, MIC [GAIN] knob)
- Using a Pedal ([FOOT PEDAL] jack)
- Connecting a USB Flash Drive (USB [TO DEVICE] terminal)
- Connecting to a Computer (USB [TO HOST] terminal)
- Using the “HD-300 Assistant” iPhone/iPad App (Bluetooth)
- Listening on the HD-300 to Audio Playback from an iPhone/ iPad (Bluetooth)
- Appendix
Appendix
HD-300 Owner’s Manual
38
About the Temperaments Used in This Instrument
Unit of interval
A cent is a unit used to measure musical intervals. The logarithm of the frequency ratio of two sounds is taken, and a
semitone of equal temperament is defined as 100 cents. Using cents to measure intervals, we can calculate the interval
using simple addition/subtraction rather than multiplication/division. For this reason, the cent is commonly and
internationally used in fields such as music and acoustics as a standard for measuring intervals.
(value in cents) = × log (frequency ratio)
(frequency ratio) = 10
× (value in cents)
Frequency Ratio and Cent Values for the Main Intervals
Interval
Interval Frequency Ratio Cent Value Comments
Octave 2 1200.000
Pure Perfect 5th 3/2 701.955
Pure Perfect 4th 4/3 498.045
Pure Major 3rd 5/4 386.314
Pure Minor 3rd 6/5 315.641
Pure Large Interval Whole Tone 9/8 203.910
Pure Small Interval Whole Tone 10/9 182.404
Pure Diatonic Scale Semi-tone 16/15 111.731 Difference between the perfect 4th and major 3rd
Pure Chromatic Scale Semi-tone 25/24 70.672 Difference between the major 3rd and minor 3rd
Meantone /2 193.157 Average between large and small interval whole
tones
Syntonic-Comma (S.C.) 81/80 21.506 Difference between large and small interval
whole tones
Pythagorean Comma (P.C.) – 23.460 Difference between the pure 5th ×12 and
7 octaves
Schisma – 1.954 Difference between P.C. and S.C.
Equal Semi-tone 100.000
1200
2log
-----------
2log
1200
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5
2
12