Guitar scales explained

This site has maybe a little too much info on guitar scales but maybe you have the urge to read up on some background stuff, so . . .
“What is the definition of a scale?
A musical scale is a discrete set of pitches used in making or describing music. Typically a scale has an interval of repetition, which is normally the octave. This means that for any pitch in the scale, we have also an equivalent pitch an octave above and an octave below it. While the limits of human hearing are finite, matters are somewhat simplified if we ignore that fact, as is usually done in discussions of theory though of course never in practice. Because we are often interested in the relations or ratios between the pitches rather than the precise pitches themselves in describing a scale, it is usual to refer all the scale pitches in terms of their ratio from a particular pitch, which is given the value of one (often written 1/1 when discussing just intonation.) This note can be, but is not necessarily, a note which functions as the tonic of the scale. For comparison with the current standard tuning cents are often used. See also logarithmic scale.” More info at Guitar Scales Frequently Asked Questions

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