Stormfriend
100+ Head-Fier
- Joined
- Jan 7, 2010
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I emailed Resonessence and they've come back to me already, which is great service. This is what their technical guy said:
The unit flashes RED briefly between sample rate changes on its input to indicate just that, It saw a sample rate change. What is happening with the OPPO is that between tracks, it is reverting back to some other sample rate (my guess is 48k) for a brief moment, before going back to the sample rate of the material. This is a bug in the OPPO in my opinion. What should happen is it should check to see if the next tract to be played matches the sample rate of the current track. If is does, do NOT change the SPDIF stream data rate between tracks. Based on the fact the OPPO can play a CD without changing the rates, proves its an issue with the OPPO itself.
Foobar with ASIO is doing the right thing, only change the rate when the rates differ between tracks.
The reason it has a fade in when a rate change occurs its due to the jitter blocking mechanism. It has the ability to block jitter to around 0.01Hz or so, so it takes a bit to lock onto the new SPDIF rate and track it, while being able to filter the jitter out of it.
Bottom line is when the source rate changes, it will incur a RED flash, then also a Fade in. The OPPO should only sample rate change if the next track to be played is different then the current track. It seems like this is not happening
I've asked if they can remove the fade in and play the music (albeit with more jitter) for the first second or so, as jitter is less of an issue than a missing drum beat (to me anyway). I'll let you know what they say.
The unit flashes RED briefly between sample rate changes on its input to indicate just that, It saw a sample rate change. What is happening with the OPPO is that between tracks, it is reverting back to some other sample rate (my guess is 48k) for a brief moment, before going back to the sample rate of the material. This is a bug in the OPPO in my opinion. What should happen is it should check to see if the next tract to be played matches the sample rate of the current track. If is does, do NOT change the SPDIF stream data rate between tracks. Based on the fact the OPPO can play a CD without changing the rates, proves its an issue with the OPPO itself.
Foobar with ASIO is doing the right thing, only change the rate when the rates differ between tracks.
The reason it has a fade in when a rate change occurs its due to the jitter blocking mechanism. It has the ability to block jitter to around 0.01Hz or so, so it takes a bit to lock onto the new SPDIF rate and track it, while being able to filter the jitter out of it.
Bottom line is when the source rate changes, it will incur a RED flash, then also a Fade in. The OPPO should only sample rate change if the next track to be played is different then the current track. It seems like this is not happening
I've asked if they can remove the fade in and play the music (albeit with more jitter) for the first second or so, as jitter is less of an issue than a missing drum beat (to me anyway). I'll let you know what they say.