The pentatonic scale uses 5 tones in an octave.
Let's do C major. C D E F G A B. So there are 7. If you count the octave (C), then 8. This is the same with any major scale.
Parallel lines are equidistant from one another
I would say between the 7th and the octave. Play a major scale but stop on the 7th............and wait. Doesn't it feel like it needs to be resolved?
I played an octave on the piano.
There are 100 cents in a semitone, so there are 1200 cents in an octave. Since an octave is equal to doubling the frequency, there are 2 tones (whole steps) in an octave.
octave
8
12 Tones in an Octave
12 semi-tones in an octave
an octave
An octave.... 0.0
I am not assuming I am in the key of F (one flat), there is one semi-tone in each octave: B flat. While Iam navigating the entire 2 1/2 octave range, navigating the range chromatically, then each note change is a semi-tone, 13 semi-tones in all for each octave. So 13+13+6 = 32 semi-tones in 2½ octaves.
The pentatonic scale uses 5 tones in an octave.
A note that is one octave higher is double the frequency. In Western music this frequency range is divided into twelve tones. The difference between each tone is called a half-step. A musical scale uses a series of eight tones, combining whole steps and half-steps, to reach the doubled frequency. It's mostly a matter of how music is defined and what our ears are accustomed to hear. In Eastern music systems there are more tones defined between a note and double its frequency. Because Western music defines a scale to have eight tones, the range is called an octave.
A B G next octave G D
The "whole tones" in music are most easily defined in the key of "C", due to the piano being the most commonly played musical instrument. On a piano, all of the "white" keys are whole tones, some separated by semi-tones, as shown by the "black" keys. In an octave, one will find seven "whole" tones, with eight in total due to a repetition of the starting tone at the end. There are five "semi-tones" (black keys) in between in each octave, after the first, second, fourth, fifth and sixth whole tones. "middle" C on a piano is ~260hz, while the ending tone on the octave is double this, at ~520hz, and each "whole" note interval in between progressively and incrementally is staged in between.