Much of that takes place on the computer. I don't know which computer
you have, but I know that M-Audio made good devices many years ago, but
never updated their drivers So over time time became a bad thing to
buy. No one can guess about support, but I certainly would tend to
believe Roland would be there for their users.
> At the beginning I was going to buy the interface cheaper, but many of
> them have annoying problems.
I see. I don't know what those are, so I wouldn't be able to say which
devices might annoy you and which might not.
> The differences at the level of the number of inputs and outputs are
> obvious.
It's not obvious until you state it directly.
> Certainly I need more than one input.
Above you say "It will be recorded jazz and acoustic guitar", so I
assume it would be one at a time.
> But in terms of the overall quality of the interface and its features.
>
> I want to interface the possibility of connecting the two microphones.
Will you be using it to record a number of musical instruments and
voices at the same time? If so you would likely need a 10x10 device,
but you would also need a powerful computer with a lot of memory too.
So you can see why a simple request for a recommendation isn't quite
complex enough to cover your needs.
> So the choice a little more expensive interfaces are due to awareness of
> the problems that arise in the case of cheaper interfaces. For $ 100 you
> can buy a toy, not the interface.
I'm not sure what part of it's tech-spec deters you. It's an excellent
interface but only intended for one simple task. I can sell you one
for $300, if you prefer! :-)
Good luck.