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The Structure of the Acoustic Guitar:Six strings, each with a higher pitch - Musical Instrument Guide - Yamaha Corporation
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Ernie Ball Skinny Top Heavy Bottom Slinky 8-String Electric Guitar Strings - 9-80 Gauge : Amazon.co.uk: Musical Instruments & DJ
![The Structure of the Acoustic Guitar:The rule of strings and pitch - Musical Instrument Guide - Yamaha Corporation The Structure of the Acoustic Guitar:The rule of strings and pitch - Musical Instrument Guide - Yamaha Corporation](https://www.yamaha.com/en/musical_instrument_guide/common/images/acoustic_guitar/mechanism_p03_01.jpg)