You should ask questions about the 1400 in the 1400 discussion thread and questions about your receiver in the Denon 3300 thread in the Amps & Receivers forum. But, if you are using analog, the player does the digital-analog conversion and the Denon's digital processing never comes into play. In other words, 48kHz or 96kHz processing in the Denon is a non-issue.
You should ask questions about the 1400 in the 1400 discussion thread and questions about your receiver in the Denon 3300 thread in the Amps & Receivers forum. But, if you are using analog, the player does the digital-analog conversion and the Denon's digital processing never comes into play. In other words, 48kHz or 96kHz processing in the Denon is a non-issue.