@laihalll
in the first repeat, the performer seems to be learning/remembering the song, and/or searching for the key; then they are quite consistent from about 1:20 on. there is also another performance with a low male voice that may be easier to follow.
so, gonna disagree here with @ElectricaNada that this is a difficult transcription project or even a “bad” performance (definitely not a “bad” musician, how rude… say “inconsistent performance” if you must critique.) it’s an unaccompanied vocal melody, within 1 octave, with repeats, and only 5 scale degrees. and you have a personal connection to it. so it’s a perfect exercise. just ignore the first two repetiions (out of 6 or 8 whatever.)
i also think this tuning is not supposed to be quite 12tet; the alterations to the 6th and 3rd seem consistent and deliberate, so maybe that is confusing.
below, i’m assuming that the song form is intended to be repeating and that the first two repeats are not exemplary. so, considering the first note of the song at 1:20.
for ease of discussion i’m going to assume that the “key” is G and the initial interval is ascending P5. so this opening G-D establishes the tonic and fifth.
[i always approach transcription as interval recognition first, and think in terms of scale degrees- even in highly chromatic or microtonal music. i find this level of abstraction helpful but others may not. for unaccompanied vocal melody, where all intervals are within a fifth, it just makes sense.]
starting from the opening fifth, it goes pretty easily. in my brain, it helps to break things up into figures, and then determine ther relationships, using some easily-identified figures as milestones; e.g.:
-
the repeated, descending whole-note figure that ends back on the tonic, at 1:28 and elsewhere
-
the low note of the melody, which anchors a transposed version of the opening figure near the end of the pattern (1:45, etc). the transposed figure ends back on the tonic and the low note is the fifth again.
so yes, this can be analyzed as a major-pentatonic melody. (on first hearing, i first tried to analyze the first two repetitions as a chromatic / microtonal thing, which was interesting! but probably wrong.)
anyways after identifying “milestones” it goes pretty easily and you get something like this:
(actually i’ll hide the specifics in case you want to give it a go yourself, first, and compare)
i’m not really sweating the rhythm at this point. i’m just assuming a steady 5/4 and that the drum pattern is something like this:

i am not familiar with the performance style - vocal / drum downbeat relationship seems loose, which could be more or less deliberate - and locking into a time signature is often problematic for styles of music that dont use a rhythmic grid in the first place. (like, i’m almost certain that my depiction of the durm pattern isn’t “correct” by its own terms - the “4th beat” is contracted, for example - it’s just a way to reconcile with western notation.) given that, i think simplification is fine with the caveat that metric placement should be taken with a grain of salt.
(there’s a long and interesting tangent here on the history of “folk” music transcription - choosing the right level of “quantification” is really an art in itself.)
(notes about typesetting)
i used lilypond to typeset this quickly. lilypond is a free program and markup language for music notation, and is very convenient if you happen to be comfortable with those paradigms. there is a web editor here http://lilybin.com/
the melody in lilypond looks like this:
\relative {
\time 5/4
r1 g'4
d'1 (e8 d)
b4 a2. b8 (a)
g4 g2. b8 (a)
g4 a2 (g4) r4
g4 e d d g
e4 d2 r4 d4
a'1 (b8 a8)
g4 g2 r4
}