That's what I thought at first, but I checked it with 48K. Same thing. Sometimes 24 and sometimes 64 channels 

On Sat, Dec 30, 2017 at 10:26 PM, Peter P. <peterparker@fastmail.com> wrote:
* Moshe Werner <moshwe@gmail.com> [2017-12-30 20:53]:
> Thanks for the replies.
>
> The interesting thing is that I'm on the same firmware, sometimes able to
> use 64 channels and sometimes I'm locked down to 24.
Is there perhaps a relation to the sampling rate used? May it be that
24chns are only available when the card runs at a high rate, perhaps
192kHz?