Weird frequency response results

[slartibartfast]

I tried using Right Mark Audio Analyzer to measure the frequency response of my Pi-DAC source with some confusing results. I used a Behringer UFO202 audio interface which is cheap but should do the job. The first graph is a loopback test to show the response of the UFO202. The second graph is Moode player and the third is piCorePlayer both via a Topping E30 DAC. Both players are showing a roll off of-3.5dB at 20kHz. Where is that roll off coming from?

[slartibartfast]

I figured it out. It was the filter I was using on the DAC

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[Man in a van]

I figured it out. It was the filter I was using on the DAC

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was it #4 ?

ronnie

[slartibartfast]

was it #4 ?

ronnie

It certainly was . I am still non the wiser why Moode sounds different to piCorePlayer.

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[Man in a van]

It certainly was . I am still non the wiser why Moode sounds different to piCorePlayer.

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It's mpd v squeeze (or squeezelite)

There's lots of stuff on't 'tinterweb

ronnie

[slartibartfast]

It's mpd v squeeze (or squeezelite)

There's lots of stuff on't 'tinterweb

ronnie

There is loads of stuff but no reason. AudioDiffmaker sees a difference but I have no idea why.

Edit. Then again AudioDiffmaker sees a difference between two recordings of the same player
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