![]() ![]() In the next section we will describe our experimental apparatus and the mathematical foundations of the intonation problem. In this paper we present a simplified approach to the problem, which is more suitable to be used as an in-class demonstration, or as a laboratory activity, to simulate how musical notes are produced on a guitar. In a recently published paper we described mathematical and physical models to be used for a more scientific approach to this problem, resulting in a complex “compensation” procedure which is very effective in improving the intonation of this type of instruments. It is then related to the correct placement of the “frets” on the “fingerboard” which enable the instrument to produce all the different notes, but it is further complicated by other subtle effects, which are usually dealt with in an empirical way by luthiers and guitar manufacturers. This problem is more complex than what might appear at first it obviously begins with the correct tuning of the “open” strings of the instrument to the desired notes, which can be easily accomplished with the help of a digital tuner. In particular, we will show in this paper how to simulate a guitar using a conventional sonometer, in relation to the problem of the instrument intonation, i.e., how to obtain correctly tuned notes on a guitar or similar string instruments. The physics principles involved in most musical instruments can be easily demonstrated with standard laboratory equipment and can become part of lecture or lab activities. Musical acoustics is an interesting sub-field of physics which is usually able to engage students in a dual perspective, by combining science and art together. The experimental procedures presented in this study can become a more structured laboratory activity to be used in general physics courses or acoustics classes. In particular, we use this modified apparatus in relation to the problem of the instrument intonation, i.e., how to obtain correctly tuned notes on these string instruments. In this paper we present a simple way to convert a conventional sonometer into a simulated fretted instrument, such as a guitar or similar, by adding a fingerboard to the sonometer. Keywords: Acoustics Musical Acoustics Guitar Sonometer Intonation Compensation Oh yep yu are right it is a true dial spinning, not a digital display.Department of Physics, Loyola Marymount University, Los Angeles, USAĮmail: Februrevised Maaccepted March 9, 2012 Is the strobo flip like the strobo stomp display?Yes, they're the same. I think it takes a while for most people to get used to the display, and some folks never get comfortable with it. I think one problem people run into is not damping the other strings well enough. The Peterson tuners are very sensitive to the overtone series, and they show it (in groups) as part of the display "wheel". The display can be jittery if it's reading harmonics from other strings. With my StroboFlip, I pick the tuned string with one finger, while using my thumb and other fingers to damp the other strings so they can't go into sympathetic ringing. This helps with any tuner, but it's especially important for the Peterson tuners in stabilizing the display while you're tuning. My Significant Other is a fiddler, and she could just never get the hang of using my StroboFlip, or my original "blue brick" Peterson VS tuner. She got the Sonic Research ST-122 and is very happy with it. I'm more used to the Peterson display because I've been using them for years now. I can tune as fast on a Peterson as she can with the ST-122. ![]() ![]() It's just a question of which display paradigm works better for you. There are a few other differences worth mentioning. The Sonic Research tuner is a little faster to switch between 12TET and sweetened tunings. It's sized better for fitting in instrument case compartments, and it's lighter in weight (although that may change with the new aluminum case model). The Peterson protects the display and buttons better with its clam shell case design, so it's better for casually throwing into a gig bag. With the ST-122 you have to be a little more careful, or use a carrying case or bag. ![]()
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