Sine Wave in Mantra Intonation

[jivatman]

This is a sine wave (equivalent to a circle). Notice how it is divided into four sections: A positive rising section, a positive falling section, a negative falling section, and a negative rising section. Each is a quarter PI

A while ago, when listening to this version of "Om Mani Padme Hum", I noticed that each refrain contains four repeats, and that these exactly match the four sections of a Sine Wave.

The First repeat starts at a base, and ends high.
The second starts high, ends at the base.
The Third starts at the base and ends low.
The Fourth starts low, and ends at the base.

Listen:




Once I noticed this, and followed this pattern myself, the mantra became unbelievably more effective.

The Gayatri is a longer, four line Mantra. Today, I finally found a version in which this identical four-part intonation pattern can be clearly noticed:



Once again, this makes the mantra vastly more effective.

Anyone else notice this pattern before, in other mantras?