Audio Maximum db???

Hello,
I was wondering if there is a way to make it so that AFTER everything is processed, (the audio distortions, the filters, the echos, etc. in sound), that BEFORE the sound even comes out of the speakers, there would also be a way to prevent a sudden 'spike' in decibels too (through a filter) that would automatically adjust the volume to prevent the sound from reaching over a certain amount of decibels. Thank you.

 

Is there a 'pre-decibal' filter out there for audio sources (not the distortion filter), but a filter that 'post-processes' (after all the other filters process, before outputting out of the speakers)? If there isn't, would that be a good idea?