Lloyd, you may be thinking of USB to S/PDIF converters, or perhaps devices that can convert a S/PDIF signal such that it can be provided TO the USB port of a computer. I'm not sure that a S/PDIF to USB converter, that can EMULATE the USB port of a computer, exists.
Supplying a USB signal to a USB DAC requires that the signal source act as a "host," rather than as a "slave," which means that either it has to be a computer, including CPU, driver software, etc., or it has to emulate one.
I don't know of any transports or converters that are designed to do that, although perhaps some exist that I am not aware of.
Best regards,
-- Al
Supplying a USB signal to a USB DAC requires that the signal source act as a "host," rather than as a "slave," which means that either it has to be a computer, including CPU, driver software, etc., or it has to emulate one.
I don't know of any transports or converters that are designed to do that, although perhaps some exist that I am not aware of.
Best regards,
-- Al