How do I not deafen myself with sounds?

So I want sounds in my project but I can't get the volume right. It's either too quiet or so loud I throw off my headphones.

'Set volume' in events to balance out the audio I guess...or balance it outside of C2.

'Set volume' in events to balance out the audio I guess...or balance it outside of C2.

How do I do that?

Here's the manual:

https://www.scirra.com/manual/109/audio

A volume of 0 dB is original volume, and below 0 dB attenuates the sound. Note amplification is not supported. For example, entering a value of -10 plays the audio back 10 dB quieter (about half as loud). Prefer setting the intended volume in the Play action; even if followed immediately by a Set volume action, some platforms will momentarily play the audio at the volume given in the Play action.