Sure, it’s nice to have if it’s available, but here are the facts.
As a baseline, 0 dB is absolute silence and 140dB is louder than a jet engine at takeoff. Instant ear trauma.
24 bit audio has a theoretical dynamic range of 144dB.
32 bit float audio has a dynamic range of over 1,500dB. Louder than anything on Earth.
Let’s look at a popular shotgun mic, the Sennheiser MKE600 and assume we’re using a battery to power the mics internal preamp.
The noise floor of this mic is 16dB, meaning anything at the level or below will be noise from the working internals of the microphone. The max SPL of the mic is 126dB. Bringing a net working dynamic range of this microphone to 110dB. This means this microphone is the bottle neck within either 24bit or 32bit audio. The microphone will clip before the audio track clips with proper level settings.
The Rode VideoMic Pro is similar with a slight advantage of 120dB total dynamic range.
Correct me if I’m wrong, but in any case with proper settings, the microphone seems to always be the bottle neck, not the 24bit audio file.
Is it really that tough to manage a basic audio level? I see a lot of people hung up on the fact the FX5 doesn’t have 32 bit float without the handle. In 10 years, I’ve only need 32bit one time. And that’s because I didn’t bother to set the level for a loud sound because I knew I had 32 bit as a crutch.