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Measuring digital audio qualities of bit-perfect playback with Diffmaker

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  • Measuring digital audio qualities of bit-perfect playback with Diffmaker

    It’s been a challenge to measure digital audio’s qualities and most of the time audiophiles don’t know any measurement outside RMAA’s analog metrics and got failed evaluations as you can see below:







    This was done through pure software environment using VB-Audio Virtual Cable to make sure no hardware’s error is involved. After lengthy research in pro audio’s communities, I found DiffMaker being used in this thread below.



    Evaluating AD/DA loops by means of Audio Diffmaker – Gearslutz Pro Audio Community



    DiffMaker was used to test for audible effects of
    • Changing interconnect cables (compensation for cable capacitance may be required)
    • Different types of basic components (resistors, capacitors, inductors)
    • Special power cords
    • Changing loudspeaker cables (cable inductance may need to be matched or compensated)
    • Treatments to audio CDs (pens, demagnetizers, lathes, dampers, coatings…)
    • Vibration control devices
    • EMI control devices
    • Paints and lacquers used on cables, etc.
    • Premium audio connectors
    • Devices said to modify electrons or their travel, such as certain treated “clocks”
    • Different kinds of operational amplifiers, transistors, or vacuum tubes
    • Different kinds of CD players
    • Changing between power amplifiers
    • General audio “tweaks” said to affect audio signals (rather than to affect the listener directly)
    • Anything else where the ability to change an audio signal is questioned

    There’s interesting metric called ‘Correlated Null Depth’ that can detect most subtle changes as measurable data. Archimago refers to this metric as below if you’re following his measurement tests.



    The higher this value, the more correlated the 2 samples are (ie. the “closer” they sound).



    Now I hope you understand better about DiffMaker and correlation depth. Let’s proceed to the methodology part. After a few runs of Diffmaker’s tests for a few weeks, this was the method I used in final version.

    1. Setup master file and audio playback/recording through digital domain. In this case, I’ll use VB-Audio Virtual Cable, foobar2000, and Audacity on Windows 10.
    2. Prepare aligned master files with silence added. For basic demonstration, I’ll make 5 samples of aligned/before/after wav files with Audacity at 24/96 format (10ms latency).
    3. Route bit-perfect recording from Virtual Cable’s master audio stream with Foobar2000’s WASAPI output to Audacity’s WASAPI input, export audio as before.wav
    4. Use free version of Fidelizer at Purist user level with updated foobar2000 configuration from Fidelizer’s User Guide, record again, export audio as after.wav
    5. Compare results using Audio DiffMaker with master file as reference.

    Testing machine ran on AMD FX8350 with 8 cores 4.2GHz and 8MB cache for L2/L3. I also used high quality motherboard with 16GB RAM and Platinum grade PSU. Here’s the result from my experiment.



    Perfected master
    parameters: 0sec, 0.000dB (L), 0.000dB (R)..Corr Depth: 300.0 dB (L), 300.0 dB (R)
    This is ideal result of exact comparison with 300.0 dB of correlation depth



    Aligned master
    parameters: -3.5sec, 0.000dB (L), 0.000dB (R)..Corr Depth: 175.6 dB (L), 174.0 dB (R)
    parameters: -4.5sec, 0.000dB (L), 0.000dB (R)..Corr Depth: 168.5 dB (L), 168.6 dB (R)
    parameters: -5.5sec, 0.000dB (L), 0.000dB (R)..Corr Depth: 167.4 dB (L), 167.5 dB (R)
    parameters: -6.5sec, 0.000dB (L), 0.000dB (R)..Corr Depth: 166.3 dB (L), 167.0 dB (R)
    parameters: -7.5sec, 0.000dB (L), 0.000dB (R)..Corr Depth: 172.5 dB (L), 176.1 dB (R)
    Average: 0.000dB (0.000-0.000)..Corr Depth: 170.35 dB (166.3-176.1)
    Median: 0.000dB..Corr Depth: 168.55 dB

    Dropped to nearly 50% of perfect data but still above 150 dB. With 9.8 dB swing range, it’s safe to assume about 5% threshold for evaluation.



    Before Fidelizer
    parameters: -1.581sec, 0.001dB (L), 0.001dB (R)..Corr Depth: 90.6 dB (L), 91.5 dB (R)
    parameters: -1.184sec, 0.001dB (L), 0.001dB (R)..Corr Depth: 87.2 dB (L), 87.3 dB (R)
    parameters: -1.018sec, 0.001dB (L), 0.001dB (R)..Corr Depth: 88.1 dB (L), 88.1 dB (R)
    parameters: -946.4msec, 0.001dB (L), 0.001dB (R)..Corr Depth: 88.3 dB (L), 86.3 dB (R)
    parameters: -686.3msec, 0.001dB (L), 0.001dB (R)..Corr Depth: 90.2 dB (L), 87.6 dB (R)
    Average: 0.001dB (0.001-0.001)..Corr Depth: 88.52 dB (86.3-91.5)
    Median: 0.001dB..Corr Depth: 88.1 dB

    Real world result arrived with quite narrowed range. It’s only 5.2 dB between min/max of correlation depth. At least it’s more reliable than aligned result.



    After Fidelizer
    parameters: -563.4msec, 0.001dB (L), 0.001dB (R)..Corr Depth: 104.0 dB (L), 95.9 dB (R)
    parameters: -1.025sec, 0.001dB (L), 0.001dB (R)..Corr Depth: 93.5 dB (L), 94.0 dB (R)
    parameters: -1.286sec, 0.001dB (L), 0.001dB (R)..Corr Depth: 87.2 dB (L), 87.3 dB (R)
    parameters: -1.025sec, 0.001dB (L), 0.001dB (R)..Corr Depth: 88.1 dB (L), 88.2 dB (R)
    parameters: -856.4msec, 0.001dB (L), 0.001dB (R)..Corr Depth: 90.4 dB (L), 87.6 dB (R)
    Average: 0.001dB (0.001-0.001)..Corr Depth: 91.62 dB (87.2-104.0)
    Median: 0.001dB..Corr Depth: 89.3 dB

    It started great with over 100 dB but the rest seems to wear down over time a bit because I also opened Chrome to chat in Facebook while during the experiment for daily usage tests. Strict tests for high quality result may lead to faking data abuse from people who can’t do a proper job.

    With Fidelizer’s optimizations, we detected 3.1 dB increment of average and 12.5 db increment of maximum correlation depth with general improvements on other metrics too. I shall conclude that there’s measurable improvement with bit-perfect playback in digital audio.

    You can also try running performing this test on your own and adjust DiffMaker configuration to show different kinds of data without rounding error or with other standards. Have fun measuring audio software optimizations with DiffMaker!

    Regards,
    Keetakawee

  • #2
    Good afternoon. I am using phils 2.0. I will buy your program , but I do wish some starting points to try with. Do you need any info from me to stat with ?
    analog stuff.
    otari mtr 10 2 track 1/4 made new by soren
    otari mtr 10 2 track 1/4 1/2 combo made new by soren
    sota sapphire used eminent tech ver 2 arm
    new sota nova table has magnetic levitation platter and full speed control and latest motor same arm as above
    thorens td124 sme ver 2 arm
    thorens td125 sme ver 2 arm
    kenwood direct drive sme ver 2 arm
    phono preamp Ml no 25 all re capped
    speakers cust infinity IRS V , new caps and LPS , magnets etc.
    mark levivson pre no 26 amps no 33
    digital three cust servers , win ser 2016 , AO
    Dacs lampi various

    Comment


    • #3
      Originally posted by Alrainbow View Post
      Good afternoon. I am using phils 2.0. I will buy your program , but I do wish some starting points to try with. Do you need any info from me to stat with ?
      Thank you for your interests with Fidelizer products, you can start learning from this page below.

      http://www.fidelizer-audio.com/user-guide

      Actually, it's very simple, simple enough to just run Fidelizer and click Fidelize button to finish the optimizations.

      Regards,
      Keetakawee

      Comment


      • #4
        Does it work in core mode ? Or must it be in another mode
        hey mykes dean is playing g now lol
        analog stuff.
        otari mtr 10 2 track 1/4 made new by soren
        otari mtr 10 2 track 1/4 1/2 combo made new by soren
        sota sapphire used eminent tech ver 2 arm
        new sota nova table has magnetic levitation platter and full speed control and latest motor same arm as above
        thorens td124 sme ver 2 arm
        thorens td125 sme ver 2 arm
        kenwood direct drive sme ver 2 arm
        phono preamp Ml no 25 all re capped
        speakers cust infinity IRS V , new caps and LPS , magnets etc.
        mark levivson pre no 26 amps no 33
        digital three cust servers , win ser 2016 , AO
        Dacs lampi various

        Comment


        • #5
          Originally posted by Alrainbow View Post
          Does it work in core mode ? Or must it be in another mode
          hey mykes dean is playing g now lol
          Fidelizer works with Core mode just fine. Fidelizer Free/Plus requires manual execution so you can run from command prompt. Fidelizer Pro can run on startup with AO's ServiceTool to set Fidelizer as default shell.

          Regards,
          Keetakawee

          Comment


          • #6
            Ok I need help.
            Email me at [email protected]
            I paid but forgot to enter the machine code when i bough it first
            analog stuff.
            otari mtr 10 2 track 1/4 made new by soren
            otari mtr 10 2 track 1/4 1/2 combo made new by soren
            sota sapphire used eminent tech ver 2 arm
            new sota nova table has magnetic levitation platter and full speed control and latest motor same arm as above
            thorens td124 sme ver 2 arm
            thorens td125 sme ver 2 arm
            kenwood direct drive sme ver 2 arm
            phono preamp Ml no 25 all re capped
            speakers cust infinity IRS V , new caps and LPS , magnets etc.
            mark levivson pre no 26 amps no 33
            digital three cust servers , win ser 2016 , AO
            Dacs lampi various

            Comment


            • #7
              [email protected] sorry
              analog stuff.
              otari mtr 10 2 track 1/4 made new by soren
              otari mtr 10 2 track 1/4 1/2 combo made new by soren
              sota sapphire used eminent tech ver 2 arm
              new sota nova table has magnetic levitation platter and full speed control and latest motor same arm as above
              thorens td124 sme ver 2 arm
              thorens td125 sme ver 2 arm
              kenwood direct drive sme ver 2 arm
              phono preamp Ml no 25 all re capped
              speakers cust infinity IRS V , new caps and LPS , magnets etc.
              mark levivson pre no 26 amps no 33
              digital three cust servers , win ser 2016 , AO
              Dacs lampi various

              Comment


              • #8
                No worries. I sent key request mail to all orders without the key. You can also forward me your PayPal payment mail message with your key again.

                Regards,
                Keetakawee

                Comment


                • #9
                  Hello and thanks. I emailed back the the hard ware key. I'll,post when I get the key and getting up and running. Thanks sorry for the confusion. I thought it was like AO . INstall get a key then email and rec a activation key.
                  analog stuff.
                  otari mtr 10 2 track 1/4 made new by soren
                  otari mtr 10 2 track 1/4 1/2 combo made new by soren
                  sota sapphire used eminent tech ver 2 arm
                  new sota nova table has magnetic levitation platter and full speed control and latest motor same arm as above
                  thorens td124 sme ver 2 arm
                  thorens td125 sme ver 2 arm
                  kenwood direct drive sme ver 2 arm
                  phono preamp Ml no 25 all re capped
                  speakers cust infinity IRS V , new caps and LPS , magnets etc.
                  mark levivson pre no 26 amps no 33
                  digital three cust servers , win ser 2016 , AO
                  Dacs lampi various

                  Comment


                  • #10
                    Originally posted by Alrainbow View Post
                    Hello and thanks. I emailed back the the hard ware key. I'll,post when I get the key and getting up and running. Thanks sorry for the confusion. I thought it was like AO . INstall get a key then email and rec a activation key.
                    I've sent you the software now. Happy listening.

                    Regards,
                    Keetakawee

                    Comment


                    • #11
                      Ok it's playing. It did not ask for a key so I assume it's because I sent it to you. Still in GUI mode
                      analog stuff.
                      otari mtr 10 2 track 1/4 made new by soren
                      otari mtr 10 2 track 1/4 1/2 combo made new by soren
                      sota sapphire used eminent tech ver 2 arm
                      new sota nova table has magnetic levitation platter and full speed control and latest motor same arm as above
                      thorens td124 sme ver 2 arm
                      thorens td125 sme ver 2 arm
                      kenwood direct drive sme ver 2 arm
                      phono preamp Ml no 25 all re capped
                      speakers cust infinity IRS V , new caps and LPS , magnets etc.
                      mark levivson pre no 26 amps no 33
                      digital three cust servers , win ser 2016 , AO
                      Dacs lampi various

                      Comment


                      • #12
                        Now in core mode. Just playing some reference pcm I need to go back and forth a little but my first guess is wow
                        it's cleaner clearer some how. I am also running PHIL's new 2.0 now as well a big leap from 1.40 I'll post more tomorrow but so far a very worthwhile 60 bucks jplay was good too but to complex and it shifted from
                        pcm to dsd even different rates .
                        analog stuff.
                        otari mtr 10 2 track 1/4 made new by soren
                        otari mtr 10 2 track 1/4 1/2 combo made new by soren
                        sota sapphire used eminent tech ver 2 arm
                        new sota nova table has magnetic levitation platter and full speed control and latest motor same arm as above
                        thorens td124 sme ver 2 arm
                        thorens td125 sme ver 2 arm
                        kenwood direct drive sme ver 2 arm
                        phono preamp Ml no 25 all re capped
                        speakers cust infinity IRS V , new caps and LPS , magnets etc.
                        mark levivson pre no 26 amps no 33
                        digital three cust servers , win ser 2016 , AO
                        Dacs lampi various

                        Comment

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