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    Weird frequency response results

    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?
    Attached Files
    Living Room: Touch or Squeezelite (Pi3B) > Topping E30 > Audiolab 8000A > Monitor Audio S5 + BK200-XLS DF
    Bedroom: Radio
    Bathroom: Radio

    #2
    I figured it out. It was the filter I was using on the DAC [emoji3]

    Sent from my Pixel 3a using Tapatalk
    Living Room: Touch or Squeezelite (Pi3B) > Topping E30 > Audiolab 8000A > Monitor Audio S5 + BK200-XLS DF
    Bedroom: Radio
    Bathroom: Radio

    Comment


      #3
      Originally posted by slartibartfast View Post
      I figured it out. It was the filter I was using on the DAC [emoji3]

      Sent from my Pixel 3a using Tapatalk
      was it #4 ?

      ronnie

      Comment


        #4
        Originally posted by Man in a van View Post
        was it #4 ?

        ronnie
        It certainly was [emoji3]. I am still non the wiser why Moode sounds different to piCorePlayer.

        Sent from my Pixel 3a using Tapatalk
        Living Room: Touch or Squeezelite (Pi3B) > Topping E30 > Audiolab 8000A > Monitor Audio S5 + BK200-XLS DF
        Bedroom: Radio
        Bathroom: Radio

        Comment


          #5
          Originally posted by slartibartfast View Post
          It certainly was [emoji3]. I am still non the wiser why Moode sounds different to piCorePlayer.

          Sent from my Pixel 3a using Tapatalk
          It's mpd v squeeze (or squeezelite)

          There's lots of stuff on't 'tinterweb

          ronnie

          Comment


            #6
            Originally posted by Man in a van View Post
            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 [emoji1787]
            Sent from my Pixel 3a using Tapatalk
            Last edited by slartibartfast; 2021-08-14, 23:09.
            Living Room: Touch or Squeezelite (Pi3B) > Topping E30 > Audiolab 8000A > Monitor Audio S5 + BK200-XLS DF
            Bedroom: Radio
            Bathroom: Radio

            Comment

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