Which is the best way to have all my songs louder

https://forums.adobe.com/people/Stefan+Gruenwedel  ha scritto Giovanni: Does this help? Matching loudness across multiple audio files

hi Stefan

no it doesn't

but dynamic processing can do it , but i don't know how set up the effect

i have tried another program editor and there is a preset for dynamic processing and i would like to reproduce in audition

thanks

Let's be clear.  Working in a digital domain, the loudest you can get is 0dB(FS).  That's the highest level that a digital system can handle and anything above that gets into clipping.  Ignoring Auditions's 32 bit Floating Point for a moment, if you're working at 24 bits, a 0dB(FS) sample will read 111111111111111111111111.  You have no more digits to add.

What you're doing when you apply hard limiting is changing the dynamic range, not the loudness (level) of your music.  Limiting the dynamic range  (i.e. making the "quiet bits" as loud (or nearly as loud) as the peaks gives the illusion of loudness.  Playing with the settings of your hard limiter will control just how much of this "fake volume" you have.

I'm with Steve and frankly prefer to allow some dynamic range rather than go for the loudest reproduction I can get.  Dynamic range gives your recording some air to breath.  However, I realise that some music genres use maximum levels and lack of dynamic range as part of the "style".

Now...to be truly controversial, some of these same styles actually use a small amount of clipping to increase the effect of loudness.  Just as guitar amps are often driven into clipping to create the image of a loud guitar, a few misguided mixers will use the effect on entire tracks. The particularly applies when you convert to MP3 where something which is at 0dB(FS) in wave will often have slight clipping once converted to MP3.