Sound is a mechanical wave that is an oscillation of pressure transmitted through some medium (like air or water), composed of frequencies which are within the range of hearing.

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Electric guitar tone control fault

I've got Epiphone LP Special II for two years. Some time ago I noticed that tone pot set at maximum or minimum was cutting all lows or highs and the guitar lost power (volume doesn't changes while I ...
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Can the Yamaha YDP-V240 be made to sound like the Casio AP650 with the lid open?

The Casio in this video ( ) ...