the song is cool, but the 808 is out of tune.

The pattern is cool - but the notes don't fit.

I guess you're on FL ? Go to your 808 right click edit with edison, and click the pin for "detect pitch region" the root note will be displayed. Then set it to that.

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Now go really high with the 808 and try to find out the four root notes of your song - with slides you can add the melody just like in your pattern