What are your goals and criteria? Do you need to have or want (the difference between need and want can be critical) the ability to save and recall presets or scenes? Do you need/want onboard processing such as limiters, compressors, delays and so on? Do you have any specific needs as far as a certain quantity of groups or aux sends,
LCR panning,
mute groups,
etc.? Do you need to support inputs or outputs other than analog mic and
line signals? Is there any physical size constraints? Do you record either two
track or multitrack? Do you want/need the ability to grow or expand the inputs and/or outputs? What is the experience and skills of the operators? You may not have answers to all of these but they are the type of issues that can make the difference in whether any particular
mixer is a good fit or not.
Digital consoles can be a
bit difficult to grasp as it is a different concept. Perhaps the most significant aspect is when you realize that unlike an analog
console, all the faders, knobs,
etc. do not actually directly alter the signal, they are simply telling the
console how the digital signal should be manipulated. So all the faders, knobs
etc. are control signals rather than actually being in the audio signal path. That means one can assign a control, say a
fader, to one audio
channel, use it to control that
channel and remember that control setting for that
channel, then assign that same control to another
channel, recall where it was last set for that
channel and then control that new
channel.
This allows a digital
console to not need to have a direct control to audio path relationship. You could have 32 physical inputs and 32 controllers for them. Or you could have the same 32 physical inputs but 16, 8, 4 or even just 1 controller that you then assign to the audio signals that you want to control.
The other aspect that may affect the numbers you noted is that many digital consoles have not just traditional mic and
line inputs and outputs but also various digital inputs and/or outputs such as ADAT, SPDIF,
AES, Cobranet, Dante, EtherSound, MADI and so on. Some mixers also provide the ability to expand the number of physical inputs and outputs via optional cards or modules. So it would not be that unusual for a digital
console to have the ability to handle a larger number of physical inputs that are on it without any options installed.