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Summary of Contents for Inventronics SIGHT-O-TUNER II
- Page 1 SIGHT-O-TUNER II OPERATING MANUAL INVENTRONICS, INC. 130 MIDDLESEX RD, Suite 14 TYNGSBORO, MA 01879-2725 www.Accu-Tuner.com Inventronics@aol.com 1-800-FAST-440 Outside USA/Canada CALL 978-649-9040...
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Page 2: Table Of Contents
BRIAN DAY THIS MANUAL IS COPYRIGHTED. ALL RIGHTS ARE RESERVED. THIS DOCUMENT MAY NOT, IN WHOLE OR PART, BE COPIED, PHOTOCOPIED, REPRODUCED OR TRANSLATED WITHOUT PRIOR CONSENT IN WRITING FROM INVENTRONICS, INC. ©2012 INVENTRONICS, INC. TYNGSBORO, MA 01879 INTRODUCTION ................2 GETTING STARTED ................. -
Page 3: Introduction
SOT owners in business until they are ready to step up to the Sanderson Accu-Tuner. Tuning with the new electronics in the Sight-O-Tuner II (SOT II) is very similar to the previous SOT with two new features:... -
Page 4: Getting Started
Shortly after the LO Batt LED is lit, the SOT II will turn itself off to before a low battery condition can create unstable results. THE TWO MODES OF OPERATION The Sight-O-Tuner II has two basic modes of operation: 1) The TUNE mode. 2) The Stretch Mode 1) When the SOT is first turned on, calibration signal will display for two seconds, and then it enters the TUNE mode. -
Page 5: Measuring The F4 Stretch Number
MEASURING THE F4 STRETCH NUMBER 1) Set the Sight-O-Tuner to F5, zero cents in the TUNE mode (stretch button not backlit). Play one string of F4 and use the COARSE cents knob to stop the rotation of the LEDs. 2) Turn the OCTAVE knob to step up one octave to F6, and play F4 again, and use the FINE cents knob to stop the rotation of the LEDs. -
Page 6: Stretch Tuning Partials
STRETCH TUNING PARTIALS When the SOT II creates a stretch tuning, the program creates the tuning and it is automatically set the SOT II to the correct partial in the following manner. This is illustrated in more detail in the following tables: OCTAVE PARTIAL... -
Page 7: Tuning Beyond C3 To F6
most notes.) The fact that some strings are mismatched makes it extremely important for the tuner to check all unisons aurally when they have been tuned with the SOT II. However, do not try to check the unisons aurally during any pitch raise. Pulling up adjacent strings affects the pitch of the strings that have already tuned. -
Page 8: Cents Offset For Hz At A4
Changing the COARSE cents control, if you would like to increase the accuracy of the SOT II, you can move a jumper to have the coarse cents control jump to the nearest five cent increment. With the jumper in the position above, shorting out the two pins, the coarse cents knob will jump to the closest five cent increment. -
Page 9: Battery Care
ONE YEAR WARRANTY INVENTRONICS offers a 1-year warranty from date of purchase, on parts and labor. We will repair or replace the SOT II, as determined at the factory, should it be found defective. This warranty is not transferable, and applies only to the original purchaser of the equipment. -
Page 10: Concise Step-By-Step Tables Of Standard Routines
APPENDIX A Concise Step-by-Step Tables of Standard Routines 1. Measurement and Storage of F4 Stretch Number: TURN ON SOT, NOTE=F, OCT=5, CENTS=0.0, tune F4 to stop LEDs, OCT up to F6, CENTS up to stop LEDs, PRESS STRETCH button. Ready to start tuning from C3 to F6. APPENDIX B Cents Tables for Non-equal Temperaments Pythagorean Temperament. -
Page 11: Cents Offset For Hz At A4
11.7 -2.0 Young's Temperament No.1 -3.9 -5.9 -3.9 -2.0 -2.0 Vallotti or Fairchild Temperament (REF: Piano Technicians Journal, Oct. 82, p.20.) Steve Fairchild independently developed this temperament in 1982 while looking for a temperament to smooth out the simple keys on small pianos. It greatly reduces the harshness caused by excessive inharmonicity, and for that reason could also be called the "Piano Teacher's Delight"... -
Page 12: What Are Partials And Beats
way that they were all equally out of tune. The difficulty with this approach was that it took 12 steps before one could tell if he was doing alright. More recent approaches to equal temperament involve one or two test intervals for each step taken in the tempering system. -
Page 13: The Two-Octave "A" Temperament
Oct 5th 4th 3rd 3rd 3rd 2nd 2nd 2nd 2nd half When one is listening to various tempered intervals, there is at least one particular area where one can hear the beat phenomenon between coincident partials of the two notes. For example: when listening to the 5th (F3-C4), these 2 tones have partials which occur in close proximity to the note C5 (the 3rd partial of F and the 2nd partial of C). - Page 14 Direct-Interval Tuning Direct-interval tuning is a way of using the Sight-O-Tuner II that exactly simulates the way fine aural tuners tune by ear. Each interval is tuned by setting its width to a specified number of cents, which is verified by a direct measurement.
- Page 15 Step 5. Now every fourth note is tuned from A2 to A4. Fill in the missing notes between F3 and C#4 to get a nine-note mini-temperament. You must now take a guess at the width of the fourths, try it on the mini-temperament, and revise it as necessary to make the fourths fit with the thirds, whose width you already know.
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Page 16: Contiguous-Interval Tuning Tests For Electronic Piano Tuners
tuned when 4 beats of A2-C#3 occur at the same tempo as 5 beats of C#3-F3, and in addition, 4 beats of C#3-F3 occur at the same tempo as 5 beats of F3-A3. Step 5. Now tune C#4 and F4 to divide the A3-A4 octave into three equal parts with thirds. You may have to taper the width of the thirds downwards slightly in the upper octave on account of the inharmonicity of the piano. -
Page 17: Octave Tuning
test and the third test indicate the C4 is flat, this is very strong evidence that C4 should be moved. But to nail down your decision, you can add a contiguous fifth test as well. To check contiguous fifths, play down a fifth and up a fifth, F3-C4 and C4-G4. If C4 is flat, the lower fifth will beat faster than the upper. -
Page 18: Sight-O-Tuner Ii Specifications
– M10 octave above the Bass P11 – P5 upper note 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. -
Page 19: Input/Output Jacks
BATTERY: Rechargeable Lithium Ion (Li-ion) battery with thirty plus hours of operation per charge. Will recharge in 7 to 8 hours and has a long life expectancy. Sight-O-Tuner II may be battery operated or plugged into an AC line. SIZE & WEIGHT: 7.25" wide, 2" high and 4.5" deep. Weight 2.0 lbs.
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