bandcoach
Zukatoku - Mod Scientist
What I've written is a little rule which keeps you in the scale, but you are right, that sometimes other notes may be used. Maybe the part in which I was wrong is cos i wrote "you must keep" to this rules. There are some occasions where you may not. My point is if you use notes only from the chosen scale, you can be sure, that your music wont sound wrong or disharmonic.
in English that would inharmonic or disharmonious
however, by sticking to the same notes in one scale rule, you would also remove the potential for creating interesting new ideas
if you stick to the one set of notes you end up being very predictable. This in itself is not a bad thing as most pop success is based on the idea of new ideas in old clothing and the degree to which you can predict what comes next vs the surprise of what actually comes next is the key to writing good pop in my many years of observing the charts and what constitutes good pop writing
But there are a lot of misicians that use other notes in their melodies. The example you gave with melodic asc and desc is classical, cos first you have a minor 7th and that is in the natural minor scale. But after that you play major 7th and it's not, but it sounds good.
Jazz musicians often do that.
Am I right?
yes and no - the concept of the ascending only melodic minor is also known as the jazz minor: I was not referencing the use of the scale as melodic tool but as a source of harmonic choice
Oh and one song I want to give as an example is Separate ways by Journey
Song is in Em
The progression on the chorus is: E5 D5 C5 D5 D#5 E5 and it sounds great.
https://www.youtube.com/watch?v=LatorN4P9aA
not exactly sure what your point is here, as the D[SUP]#[/SUP] is not a melodic idea but indicates that the chord is chord V[SUP]7#5b9[/SUP][SUB]/7[/SUB] in 1st inversion i.e B[SUP]7#5b9[/SUP][SUB]/D#[/SUB] as D[SUP]#[/SUP]-F[SUP]##[/SUP]-A-B-C (D[SUP]#[/SUP]-G-A-B-C), i.e. the chords are based on the idea that we are hearing i-[SUP]b[/SUP]VII-[SUP]b[/SUP]VI-i[SUB]/3[/SUB]-[SUP]b[/SUP]VII-V[SUP]7#5b9[/SUP][SUB]/7[/SUB]-i or a properly formed perfect cadence (some prefer authentic but it's too limited for my taste as a descriptive term) in the last two chords (Em-D-C-Em[SUB]/G[/SUB]-D-B[SUP]7#5b9[/SUP][SUB]/D#[/SUB]