# This poem is titled Ζ-Gap

The answer is a two-digit number.

Do whatever you want to play
Solution is one step away
Mine for alien harmony

Take some notes you want to declare
Regions you were so unaware
Fundamental is always there

Lurking frequencies over it
Tiny steps between for the fit

• I can't explain the title. Any hints? Jul 17, 2023 at 19:49

The number is

19

Each line of the poem

corresponds to an odd member of the harmonic series. The first couple letters of the line represent the solfege of that pitch. Some of the harmonics are kind of weird or "alien".

Do whatever you want to play

The first harmonic is the fundamental represented by Do.

Solution is one step away

The third harmonic is the fifth scale degree or Sol.

Mine for alien harmony

The fifth harmonic is the third scale degree or Mi.

Take some notes you want to declare

The seventh harmonic is a weird flat seventh scale degree. A major seventh would be ti, a flat seventh can be represented by te or Ta.

Regions you were so unaware

The ninth harmonic is the second scale degree or Re.

Fundamental is always there

The eleventh harmonic is a weird sharp fourth scale degree. A perfect fourth would be fa so a messed up one could be Fu.

Lurking frequencies over it

The thirteenth harmonic is another weird one. It's close to a flat sixth scale degree. A regular sixth is la so a weird one could be Lu.

Tiny steps between for the fit

The fifteenth harmonic is a relatively accurate leading tone or Ti.