@uberwaltz
Your are correct that the Ayre Codex DAC does not include a digital coax input (it should but does not). The Ayre Codex DAC specs are:
Input
USB : PCM 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz, 352.8 kHz, 384 kHz (up to 24 bits), DSD64, DSD128
Optical input (Toslink)
Your are correct that the Ayre Codex DAC does not include a digital coax input (it should but does not). The Ayre Codex DAC specs are:
Input
USB : PCM 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz, 352.8 kHz, 384 kHz (up to 24 bits), DSD64, DSD128
Optical input (Toslink)