This is a quick guide on actualy making basic Music. Anyone here probably has some sort of music making program so I'll just layout the basics. If you dont have anything, jsut download midimaker. Google it or something...
Chords: These are the basis of EVERY song you will make, The trick is to find the correct "key(I'll explain about that later) Because when playing certain chords, only 9 out of thirteen notes can be hit, the other 4 notes will sound bad, and clash with the song. Next time you make a song, Use the key of...A minor. This means, only hit white notes ( this means, no sharps or flats). An A minor is note A, note C, and note E all played at once. Try playing that with your strings. it will make a nice sound to it. And thats the basis for a chord. A minor chord consists of the original note (in this case...it's the A) then 4 semitones up is your next note (1a-2a#-3b-4c) and 5 semitones up from the second note (1c-2c#-3d-4D#-5e) makes the last note in a basic chord. The chord notes are now A C E. A major is the same thing except, 5 semitones up and then 4, not 4 semitones and then 5 like the minor.
Now that You know chords You can learn---
Chord Progression.
using a single Chord for the whole song is going to be VERY repetitive. And get boring quickly. So chord Progression is a set of chord's (usualy 4 measures long) that repeat, This allows for a familiarity to the song, but also allows it to be varied. My song here should show you what I mean. what I did near the middle was change the chord progression to a different set of chords for the chorus. It's a little advanced, but gives a relief from the main melody. Let's stick to the original key of A Minor for this part. A simple chord progresion could be (per 4 beat measure) Amin Gmaj Fmaj Gmaj and repeat after Gmaj back to the Amin. So long as you remember not to use any sharps or flats and use just a basic chord like I showed, This will sound quite nice. the chord progression is usually done on the Bass, but doesn't have to be. The Chor progression will MAKE your song, what it is. If you are on a sound program right now, Make this chord Progression and copy and paste it till its about 40-50 seconds long.
This Brings Us to the
Melody: Using your chord progression (AGFG) You want to use that as your basis for the melody. The melody Is the part of your song that people remember, those littlenotes, that shout the song out through the accuracy of it. The easiest way to do a melody is stick to using the notes in that chord. so if it's an A minor, use the notes A,B,C,E, of any octave. then when the chord switches to the G use the notes G,A,B,D and with F as you might know by now, Use F,G,A,C. These are "single" notes that you should hit for the time being, not chords. (Experiment by adding notes to your already made chord progression. Thats the best way to figure out how to make music sound right). Remember to change the melody around, because No matter what you do, your chord progression will bring the song along nicely, That's what it's meant for.