From the Holy Spirit / God , no rhyming noises . I do find sometimes when I pray in tongues that the prayer words will start repeating and that is signal that there is a melody with prayer and the melody will come from the Holy Spirit the same way the tongues do and I sing the prayer . Sometimes I notice the melody will have a middle eastern tonal quality , but I guess that makes sense if my prayer language is from that area of the world .
"Rhyming" , makes me think of Paul "Rhyming" Simon the singer , song writer . From "Seven Psalms " .
Life is a meteor
Let your eyes roam
Heaven is beautiful
It's almost like home
Children! Get ready
It's time to come home
Amen