Looking at the new MixPre-D by Sound Devices I got the idea that perhaps it would be possible to connect it to a Sony PCM D-50 digitally. After some googling I found out that there indeed are portable SPDIF-AES/EBU converters such as a HOSA ODL 312. So, my question is: Will I be able to record MixPre-D's AES/EBU XLR output 24-bit signal digitally via the D-50 mini-Toslink input with a converter like this?
It won't work. I connected a MixPre-D via XLR AES out to a Hosa ODL-312 then from the 312 to a Sony D-50 via Toslink and the D-50 reports "Unknown Data." I contacted Sound Devices and they replied that MixPre-D AES does not have the SPDIF header data required by the D-50. SD suggested using the XLR out or tape out to the D-50 line in.
Asked Sound Devices to consider this as an enhancemnt and they agreed to consider. Made it clear that the request is for the MixPre-D AES output to report the specific header data for the sample rate and bit depth. The hardware is connected correctly and signal is converted by the Hosa ODL-312, but a firmware updgrade is requested to add the specific header data to the AES signal so the Sony D50 will recognize the data stream. They said to watch their web site for a firmware upgrade.