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In Reply to: RE: Thanks found problems but SQ diminishes after one track! posted by Ebit on May 25, 2015 at 01:14:20
Well, you are making some progress. You know something about how Fidelizer and the WiFi adapter are affecting your system.
Some ideas for more experiments:
- Try playing a long track to see if sound quality stays the same all the way through the track.
- Try playing a series of short tracks to see whether the change in sound quality still occurs at the start of the second track.
This might tell us whether the change is related to elapsed time or to the changeover from one track to another.
- Try using Direct Sound rather than the iFi driver. Set JRiver to output at the native sample rate/bit depth of the material that you are playing. This might tell us whether the iFi driver has a role in the sound quality change.
- The iFi DAC operates from a battery. It is possible that the battery does not deliver as much current after a few minutes. I believe that there is a feature for setting the power mode. You might try using different power mode settings.
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Thanks Old Listener
More good suggestions. I will do the further listening tests, but it will take a little while as I will be out of town.
You said, "The iFi DAC operates from a battery. It is possible that the battery does not deliver as much current after a few minutes. I believe that there is a feature for setting the power mode. You might try using different power mode settings." This may also be worth following.
When I restart the player software, this is the only thing touched. Volume control on the Micro is not touched. Stopping the track, exiting, restarting, and finding the track again, takes about 40 seconds. If there were a power problem with the iDSD DAC presumably the 40sec would be enough to sort out the batteries - temporarily?
I have always had a sense that on restaring the player software and returning to the track that it sounds a little louder than when I left it!
Not sure how to go about measuring iDSD DAC/Amp output voltage with a test signal to verify. Or how to measure the battery charge/output? Suggestions?
Cheers
Frank
maybe it's your ears playing up. Do you always start the track with nothing else playing in the background ? Expectation bias is a wonderful thing.
Try joining 2 smaller tracks into the same file to check if it is a physical track change issue.
http://mqnplayer.blogspot.co.uk/
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