RS422 to USB reliable for recording?

[Lotus 7]

Hate to throw water on your campfire, but setting up a good, USB connection (only) for real-time audio data transfer can be problematic enough requiring optimum buffer settings and a good, bug-free driver. Adding a RS422 serial converter to the mix is (IMHO) just asking for trouble. Even using a USB hub in the data path can be an issue depending on what other devices are on the hub.

Those RS-232/422/485 to USB converters were intended for use with printers and scanners which have large internal buffers and don't require real-time data transfer. What kind of a device do you have that outputs AES digital audio via RS-422? Is the RS-422 device something that is core-audio compatible, or do you have a driver that will work with it?

Having said that, the only way you'll really be able to find out if it might work is to try. Maybe you can get a serial converter with a return policy if it doesn't work.

[brew]

Dude, what are these "units?" That'd help.

Second RS422 is a data communication format. It's never used for audio. So I think you are a bit confused about how your gear works.

[nrand]

The units are a Korg A1 and a Sony DPS V77.
I am looking at a Bel Digital Audio 2110 Audio shuffler as a space and cost savings alternative to a digital mixer - given I only need something for two units.
Point taken on the RS422 - the Bel audio has a pair of these - but I could spare one of its AES outputs instead I suppose. I still need to send to my EU 0404 DAW Interface, which has Coax and Optical, both switchable to AES./EBU but has no XLR digital inputs. The Bel Audio has XLR Digital outs. I would still need something like a Hosa CDL 312 to bridge the two.
The version of the Bel Audio unit I am looking at has no analogue in - unlike the version in the manual - only digital.
http://www.beldigital.com/pdf/legacy/!bel2110.pdf

[brew]

With a short run you can just connect balanced AES to unbal SPDIF. Or to do it properly you just use a $30 digital audio balun XLR to coax. Common stuff.

[nrand]

Thank you for your advice.
This simplifies things a lot.
I found someone who can do the cables I need with 110ohm Mogami cable and Neutrik connectors - I am all thumbs with fine motor stuff.