The “right” playlist doesn’t mean just choosing a bunch of songs you hear on the radio.

We’re talking about creating a scientifically engineered mix that makes torching calories automatic.

Makes you wish you were Samantha Ronson?

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You sort of can be.

Here’s how to deejay your perfect cardio playlist.

So pick two songs at about 120 BPM.

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That’s short for beats per minute and roughly correlates to what you want your heart rate to be.

Keep these at 130 to 140 BPM.

This is a strategic breather.

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You’ve logged about 30 minutes of cardio.

Cue two chill-out songs under 110 BPM to hit your 450-calorie-burn target.

Research suggests that slower speeds like this are best for lowering blood pressure and heart rate.

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And Foster theorizes that this gradual dial-down is the key to enjoying exercise.

You wrap up your session in a happy place that you’ll actually want to revisit.

Listen to each five times, researchers say; familiar songs are 18 percent more motivating.

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You know the lyrics, look forward to the chorus and will associate it with positive memories.

Then keep it “sacred.

“Your workout playlist should be for one thing and one thing only: working out.

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No listening to it on your commute or party pregaming.

Tweak the beat.you’re free to use songs you already have for your workout.

Download Cruise Control ($5; iTunes).

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It alters tracks to lower or higher beats per minute without creating annoying chipmunk vocals.

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