How to key my music??

[botstein]

Grab an electronic keyboard and +1 to the music theory.

+1 to music theory.

[MWagner]

^ What he said. Mind you, that will only determine what the Root note of the key is, but not whether it's a Major or Minor key.

with electronic music if you just assume its minor you'll be right about 90% of the time. at least with the genres I play.

[DJ_JCohh]

For 95% of popular music, the key of the song is the first chord of the verse/chorus/drop/what-have-you. So set a 1-bar loop on that first beat, and then sweep through all the notes in a scale on an instrument or in software until you've found the note that matches what you're looping. In most cases, that note is going to be the key of the song.

This is exactly what i was looking for ^^^ thank you @Underwaterrobots !!

And to everyone else, thank you too. I have read some of the "music theory for dummies" book i have but wanted some actual more...hmmm...ears-on learning?? I guess lol. This books ok but i feel like there is probably better out there....is there any book that someone would reccommend beyond this? (introductory nothing to fancy)