I’m three weeks into burning in an Oppomod HDMI to I2S internal card for an Oppo 203 and have a question about the sound of I2S. It comes from not knowing what to expect, as I’ve only heard I2S via the Oppo to a DS dac, mainly using PS Audio’s old I2S-12 (silver) HDMI, along with a little of the current I2S cable that comes with the DMP.
Specifically, with the Oppomod card, as well as the outboard card off eBay some of us got before it, when I switch from spdif via a good mid-level Snake River Boomslang to I2S there is a little rise in pitch and a dose of atmosphere added, something like a touch of processing or recording room acoustics. Together, they make the highs sound very extended, but also make instruments and the overall sense of the music more ephemeral, more floating in space, i.e., less palpable or solid and planted. With decent recordings, these characteristics are enchanting and help make for great dynamics (and listening from another room). But they also seem more artificial than natural, as if the transfer has added to the recording. I took Ted’s suggestion on another thread to unplug/replug all the power cords for the first time in many months and that definitely improved coherency top to bottom, but it did not change the atmospherics and pitch change. Between the three components involved – Oppomod card, HDMI cable and the DS – I’m not sure what to make of it.
I tried a CD with low frequency tones and the differences between spdif and I2S were obvious: with the coax, low tones such as 60 Hz sounded as they should, but with I2S there were strong overtones that made each tone seem like it came from a much higher frequency.
I’ve been thinking of experimenting with other cables, but before that it seems worth asking for others’ thoughts or suggestions, especially those that have used I2S with the DS. Thanks,