Loop Transpose Rule and Theory?

Hello, I have a ton of loops, and finding BPM is not hard. I can also find the key of the loop pretty easy. However, what are the rules for transposing? I have a transpose chart, a couple actually. However, what are the rules governing Major and Minor? Lets say a loop is in A minor, but the song I am working is in the key of D minor. I want to use the A minor loop in a D minor song. Do I only concern myself with the letter of the Key,as the root? (A and D) for my transpose while looking at the chart, chart shows that to go from A up to D is 5 semitones/halfsteps. However, what about going from a major to a minor, stuff like that? What is the best way to do all this? Yes, I am also studying music theory, got a ways to go.

Unless you have Celemony Melodyne, which lets you break apart the loop into notes and edit them. This is for solo instruments, however.

Scott

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If you don't want to change individual notes in the loop then you can try getting a match by transposing the loop to a chord that's in the key of your desired target key. 

For example, let's say you have a loop in Gmin, and you want to use it in a song that's in E major.


First work out the chords that are part of the key of E major: Emaj, F#min, G#min, Amaj, Bmaj, C#min, D#dim. 


So if you wanted to use that Gmin loop in the Emaj song, you could transpose it to F#min, G#min or C#min. Of course whether any of them would sound "right" in the song's context is entirely subjective.