No, you can’t tune cymbals. Cymbals don’t have a mechanism that allows you to change the tensions of their surfaces. So, you’re stuck with whatever sound they make. This is why it’s more important to invest in good cymbals than it is to invest in a good drum kit. Even the cheapest drum kits can be tuned to sound good. Cheap cymbals, on the other hand, can’t be salvaged. If you have a budget of $1500, I’d suggest spending $1000 on cymbals and $500 on a drum kit. That’s my two cents as a drummer who’s been buying gear for two decades. If you want to slightly alter the sound of a cymbal, you can muffle it a bit by attaching tape to the underside. You can also tape coins to the bottom to create a rivet effect.