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MLegend's Recent Activity

  1. MLegend rated atomicbob's post Epic in the thread Inferred Jitter visual guide.

    Inferred Jitter visual guide Terminology for this discussion Fs: sample rate frequency f: sinusoid signal frequency (stimulus) inferred...

    01 20250716 inferred jitter 44K Wiim Ultra spdif-opt in to dac1221 USB input SE output annotated.png 02 20250716 inferred jitter 44K Vaunix Lab Brick to dac1221 USB ASIO input SE output.png 03 20250717 inferred jitter dac1221 spdif coax input SE output t3 zoom annotated.png 04 20250716 inferred jitter 44K Wiim Ultra spdif-opt in to dac1221 USB input SE output annotated.png 05 20250716 inferred jitter 44K Vaunix Lab Brick to dac1221 USB ASIO input SE output annotated.png 06 20250717 inferred jitter dac1221 spdif coax input SE output 120 Hz sidebands.png 07 20250717 inferred jitter dac1221 spdif coax input SE output 240 Hz sidebands.png 08 20250717 inferred jitter dac1221 spdif coax input SE output 360 Hz sidebands.png Jul 17, 2025 at 9:23 PM

  2. MLegend rated atomicbob's post Epic in the thread Wiim Pro and Ultra Technical Measurements comparison.

    @earnmyturns has provided a nice explanation. I'll give a more visual description specifically oriented to dScope measurements....

    20250716 inferred jitter 44K Wiim Ultra spdif-opt in to dac1221 USB input SE output annotated.png 20250716 inferred jitter 44K Vaunix Lab Brick to dac1221 USB ASIO input SE output.png 20250716 inferred jitter 44K Dante RDL SF-ND2 to dac1221 spdif coax input SE output.png Jul 17, 2025 at 9:40 AM

  3. MLegend rated atomicbob's post Epic in the thread Wiim Pro and Ultra Technical Measurements comparison.

    Pro at 0 dBFS [ATTACH] Ultra at 0 dBFS [ATTACH] Both Pro and Ultra clip the filter response ring at 0 dBFS. Both units demonstrate DC...

    61 20250701 Wiim Pro 20 Hz square 5_6Vpp 100uS div spdif-opt SE BW calc.png 62 20250701 Wiim Ultra 20 Hz square 5_7Vpp 100uS div spdif-opt SE BW calc.png 63 20250701 Wiim Pro 20 Hz square 5_6Vpp 10uS div spdif-opt SE BW calc.png 64 20250701 Wiim Ultra 20 Hz square 5_7Vpp 10uS div spdif-opt SE BW calc.png 65 20250701 Cyan2 20 Hz square 7Vpp 5uS div spdif SE BW calc.png 66 20250701 Wiim Pro 20 Hz square 560mVpp 10uS div spdif-opt SE BW calc.png 67 20250701 Wiim Ultra 20 Hz square 570mVpp 10uS div spdif-opt SE BW calc.png 68 20250701 Wiim Pro 20 Hz square 180mVpp 10uS div spdif-opt SE BW calc.png 69 20250701 Wiim Ultra 20 Hz square 180mVpp 10uS div spdif-opt SE BW calc.png 70 20250701 Cyan2 20 Hz square 223mVpp 5uS div spdif SE BW calc.png Jul 14, 2025 at 9:46 PM

  4. MLegend rated atomicbob's post Epic in the thread Wiim Pro and Ultra Technical Measurements comparison.

    Square wave (step response) [ATTACH] dScope signal generator sends a 20 Hz analytical square wave to the Device Under Test (DUT) via...

    50 20250712 dScope spdif - DAC- 5243b square wave test setup.png 51 20250712 dScope 20 Hz sqr 2Vpp 100uS div SE - annotated.png 52 20250712 dScope 20 Hz square 2Vpp 10uS div SE BW calc.png Jul 14, 2025 at 9:46 PM

  5. MLegend rated atomicbob's post Epic in the thread Wiim Pro and Ultra Technical Measurements comparison.

    1 KHz sine -90 dBFS - Pro [ATTACH] 1 KHz sine -90 dBFS - Ultra [ATTACH] Ultra 1 KHz -90 dBFS sine is definitely better resolved than on...

    41 20250704 Wiim Pro -120dBFS FFT spdif-opt SE.png 42 20250704 Wiim Ultra -120dBFS FFT spdif-opt SE.png Jul 14, 2025 at 9:46 PM

  6. MLegend rated atomicbob's post Epic in the thread Wiim Pro and Ultra Technical Measurements comparison.

    Residual Noise - Pro [ATTACH] Residual Noise - Ultra [ATTACH] Ultra residual noise spectrum is generally lower though some specific...

    31 20250701 Wiim Pro residual noise FFT spdif-opt SE - 150 dB range.png 32 20250702 Wiim Ultra residual noise FFT spdif-opt SE - 150 dB range.png 33 20250701 Wiim Pro inferred jitter FFT spdif-opt SE.png 34 20250702 Wiim Ultra inferred jitter FFT spdif-opt SE.png 35 20250701 Wiim Pro imaging FFT spdif-opt SE.png 36 20250702 Wiim Ultra imaging FFT spdif-opt SE.png 37 20250703 Wiim Pro -90dBFS FFT spdif-opt SE.png 38 20250702 Wiim Ultra -90dBFS FFT spdif-opt SE.png Jul 14, 2025 at 9:46 PM

  7. MLegend rated atomicbob's post Epic in the thread Wiim Pro and Ultra Technical Measurements comparison.

    Select standard measurements presented below in pairs with Wiim Pro first and Wiim Ultra second. Distortion Spectrum - Pro [ATTACH]...

    21 20250701 Wiim Pro Distortion FFT SE 0dBFS - spdif-opt.png 22 20250702 Wiim Ultra Distortion FFT SE 0dBFS - spdif-opt.png 23 20250701 Wiim Pro distortion vs frequency FFT spdif-opt SE.png 24 20250702 Wiim Ultra distortion vs frequency FFT spdif-opt SE.png 25 20250701 Wiim Pro dynamic range FFT spdif-opt SE.png 26 20250702 Wiim Ultra dynamic range FFT spdif-opt SE.png 27 20250701 Wiim Pro amplitude linearity FFT spdif-opt SE.png 28 20250702 Wiim Ultra amplitude linearity FFT spdif-opt SE.png 29 20250701 Wiim Pro noise and interference FFT spdif-opt SE - 160 dB range.png 30 20250702 Wiim Ultra noise and interference FFT spdif-opt SE - 160 dB range.png Jul 14, 2025 at 9:46 PM

  8. MLegend rated atomicbob's post Epic in the thread Wiim Pro and Ultra Technical Measurements comparison.

    Wiim Pro - Ultra Technical Measurements comparison [ATTACH] Wiim Pro on top, Ultra on bottom. Introduction Wiim Pro and Ultra have...

    01 Wiim Pro and Ultra.jpg 02 Listening setup.jpg 03 20250712 dScope spdif - DAC- dScope analog input test setup.png Jul 14, 2025 at 9:46 PM

  9. MLegend liked Lyander's comment on Lyander's profile post

    Yep, seems to err on the side of being super diffuse and spread out. I don't get to listen to a lot of recordings with this sort of...

    Jul 12, 2025 at 12:23 PM
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