The MOTO 24 i/o has TRS outputs so you still need something to get into the computer.
RME has these (there is a lesser one usually have to search for it on RME:
http://www.sweetwater.com/store/detail/HDSPeRayDAT/?utm_source=Google&utm_medium=PPC&utm_campaign=audio&utm_term=rme_hdspe_raydat&adpos=1t1&creative=14165894161&device=c&network=s&matchtype=b&gclid=CN3IsKW337cCFfBaMgod5hQAlw This one is a 72 channel PCI-e card in the computer (they have a 36 channel one but I don't think it is as flexible as this one for connections).
The MOTU won't work without another unit to go into and it has TRS 1/4" outputs looking at it so it a computer card would have to have those 24 kinds of connections to connect to.
To me I doubt it if can be done. Not citing RME to buy at all, just showing what equipment where I can find it you would have to use. RME has mic XLR 8 channels units also like Misestacy however it is spelled or the OctaMic II whatever unit that is, but the
HDSPeRayDAT PCI-e card that allows the connection to whatever AD convertor or such you would get would be where it goes. You can find it over at the RME website, I did last night but have to search again to find the page at RME. They don't list it along with all the other stuff on that page I linked to in previous post.
That was to go out of his mixer into the AD convertor which goes by connection into the HDSPeRayDAT card inside of the computer to run the DAW. Actually you could do without his mixer also and just buy mic inputs and outputs and other equipment there also. ?????
http://www.rme-audio.de/en_products_hdspe_raydat.php found it.
The interfaces depend on which kind of equipment cables you want to connect with, while this one I think has all 3 type of connections AEU/ADAT/whatever it connects with as a path into the computer.
Oh, the RayDAT has 36 inputs and 36 outputs (I guess for monitors connections or that stuff).
So it is 72 total channels.
Well, if he is only two tracks at a time, he should record through a better audio/interface into the computer than a sound card and record all the tracks first into the DAW (24 channels or tracks) then mix down and whatever, because Sonar will Export all the tracks into an outputted 2 track WAVE or possibly *.MP3 file getting the code for that to run it in the DAW or perhaps even burn a CD with the song (songs) afterwards by a Microsoft program or NERO program to make a CD-R CD playable on a CD player or DVD player or such device. After that if you want a regular CD you would have to send the files somewhere where they make a regular CD for sale then.
If he wants to use the ADAT tape machines I would talk to the manufacturer first like RME to make sure that the output of the ADAT tape machine could go into another unit. Oh, ya, it was a digital connector I don't know what kind so I imagine there may not be cable for it anymore so that would be out also. Only a 1/4" cord-based system into the AD convertor could be used then or from the phono outputs of the ADAT tape machine into a 1/4" TRS input of the AD convertor. Cords would have to be made (probably not found without adaptors being used and stuff like that so the connection would be not good as it should be for a studio). (consumer-grade -10dBu stuff instead of studio +4dBu standard whatever it is.
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I have to eat my food getting cold.
I know I babbled on here but the connections have to be there on whatever unit to go into a unit that gets to the DAW (audio/interface) on the MOTU or any equipment used.