Audio quality tests

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32kHz sample rate

Using MDFourier 1.07d (15-12-2021) with this reference file.

The 32kHz sample rate is most commonly used by licensed software. It is upsampled to 48kHz in hardware prior to final output.
The nominal sample rate is 54MHz÷1124, rather than 54MHz÷1125. This is reflected in the frame duration of the standard equipment test.

A 15kHz white screen was displayed to induce audible noise.

ASUS PRIME X570-PRO

Using ALC1220 (S1220A).

This sound card serve as our analog reference.

Source Difference Noise floor Time spectrogram
Nintendo Stereo AV Cable
With DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000-fktq vs Nintendo Stereo AV Cahhc.png File:NF SP B Nintendo Stereo AV Cabhz -1Silence.png
Nintendo Stereo AV Cable
With DOL-CPU(P)-10 		File:DA ALL AVG mdfourier-dac-48000-fqyo vs Nintendo Stereo AV Cakmq.png File:NF SP B Nintendo Stereo AV Caxmv -1Silence.png
Generic S-Video Cable
With DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000-ffqj vs Generic S-Video Cablecwg.png File:NF SP B Generic S-Video Cableytn -1Silence.png
HD Retrovision SNES Component Cable
With DOL-CPU(P)-10 		File:DA ALL AVG mdfourier-dac-48000-fbor vs HD Retrovision SNES Cwoj.png File:NF SP B HD Retrovision SNES Cpxl -1Silence.png
Bitfunx GameCube Component Cable
Swapped L/R 		File:DA ALL AVG mdfourier-dac-48000-fwee vs Bitfunx GameCube Compsac.png File:NF SP B Bitfunx GameCube Compvqp -1Silence.png
GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
DC Offset 		File:DA ALL AVG mdfourier-dac-48000 vs GCVideo-DVI v3.1 + Pomcn.png File:NF SP B GCVideo-DVI v3.1 + Poxmt -1Silence.png
GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
DC Offset + Sample Rate Hack [1] 		File:DA ALL AVG mdfourier-dac-48000 vs GCVideo-DVI v3.1 + Pobgl.png File:NF SP B GCVideo-DVI v3.1 + Poztr -1Silence.png
  1. ↑ https://github.com/ikorb/gcvideo/blob/main/Firmware/README.md#advanced-settings

Blackmagic Intensity Shuttle

Using CS42526 and ADV7604.

Its audio input suffer from internal interference.

Source Difference Noise floor Time spectrogram
Nintendo Stereo AV Cable
With DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000-fuvk vs Nintendo Stereo AV Cagbm.png File:NF SP B Nintendo Stereo AV Calrw -1Silence.png
Nintendo Stereo AV Cable
With DOL-CPU(P)-10 		File:DA ALL AVG mdfourier-dac-48000-fjyv vs Nintendo Stereo AV Capxv.png File:NF SP B Nintendo Stereo AV Calls -1Silence.png
Generic S-Video Cable
With DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000-filb vs Generic S-Video Cableshd.png File:NF SP B Generic S-Video Cablezip -1Silence.png
Hyperkin 3-in-1 HDTV Cable
With DOL-CPU-11
HD Retrovision SNES Component Cable
With DOL-CPU(P)-10 		File:DA ALL AVG mdfourier-dac-48000-ffpq vs HD Retrovision SNES Cjhu.png File:NF SP B HD Retrovision SNES Chto -1Silence.png
Bitfunx GameCube Component Cable
Swapped L/R 		File:DA ALL AVG mdfourier-dac-48000-fwbi vs Bitfunx GameCube Compfvh.png File:NF SP B Bitfunx GameCube Comprvg -1Silence.png
GCVideo-DVI v3.1
GCVideo-DVI v3.1
Sample Rate Hack [1]
  1. ↑ https://github.com/ikorb/gcvideo/blob/main/Firmware/README.md#advanced-settings

Hauppauge WinTV-HVR-1850

Using CX23888.

Its audio input suffer from internal interference.

Source Difference Noise floor Time spectrogram
Nintendo RF Modulator
With DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000-fgud vs Nintendo RF Modulatorxim.png File:NF SP B Nintendo RF Modulatorpxm -1Silence.png
Nintendo Stereo AV Cable
With DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000-fkik vs Nintendo Stereo AV Cankb.png File:NF SP B Nintendo Stereo AV Cayxe -1Silence.png
Generic S-Video Cable
With DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000-fydg vs Generic S-Video Cableooa.png File:NF SP B Generic S-Video Cableiuw -1Silence.png

Open Source Scan Converter

Using PCM1862.

RetroTINK-5X Pro

Using PCM1808.

  • Difference
  • Nintendo Stereo AV Cable With DOL-CPU-11
    Nintendo Stereo AV Cable
    With DOL-CPU-11
  • Nintendo Stereo AV Cable With DOL-CPU(P)-10
    Nintendo Stereo AV Cable
    With DOL-CPU(P)-10
  • Generic S-Video Cable With DOL-CPU-11
    Generic S-Video Cable
    With DOL-CPU-11
  • HD Retrovision SNES Component Cable With DOL-CPU(P)-10
    HD Retrovision SNES Component Cable
    With DOL-CPU(P)-10
  • Bitfunx GameCube Component Cable Swapped L/R
    Bitfunx GameCube Component Cable
    Swapped L/R
  • GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter DC Offset
    GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
    DC Offset
  • GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter DC Offset + Sample Rate Hack
    GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
    DC Offset + Sample Rate Hack
  • Nintendo GameCube Component Video Cable + Nintendo Stereo AV Cable With DOL-CPU-11
    Nintendo GameCube Component Video Cable + Nintendo Stereo AV Cable
    With DOL-CPU-11
  • Nintendo GameCube Component Video Cable + Nintendo Stereo AV Cable With DOL-CPU(P)-10
    Nintendo GameCube Component Video Cable + Nintendo Stereo AV Cable
    With DOL-CPU(P)-10
  • Nintendo GameCube Component Video Cable + Generic S-Video Cable With DOL-CPU-11
    Nintendo GameCube Component Video Cable + Generic S-Video Cable
    With DOL-CPU-11
Source Difference Noise floor Time spectrogram
Nintendo Stereo AV Cable
With DOL-CPU-11
Nintendo Stereo AV Cable
With DOL-CPU(P)-10
Generic S-Video Cable
With DOL-CPU-11
HD Retrovision SNES Component Cable
With DOL-CPU(P)-10
Bitfunx GameCube Component Cable
Swapped L/R
GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
DC Offset
GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
DC Offset + Sample Rate Hack [1]
Nintendo GameCube Component Video Cable + Nintendo Stereo AV Cable
With DOL-CPU-11
Nintendo GameCube Component Video Cable + Nintendo Stereo AV Cable
With DOL-CPU(P)-10
Nintendo GameCube Component Video Cable + Generic S-Video Cable
With DOL-CPU-11
  1. ↑ https://github.com/ikorb/gcvideo/blob/main/Firmware/README.md#advanced-settings

48kHz sample rate

Using MDFourier 1.07d (15-12-2021) with this reference file.

The 48kHz sample rate is most commonly used by homebrew software and streaming audio in licensed software.
The nominal sample rate is 54MHz÷1124, rather than 54MHz÷1125. This is reflected in the frame duration of the standard equipment test.

A 15kHz white screen was displayed to induce audible noise.

ASUS PRIME X570-PRO

Using ALC1220 (S1220A).

This sound card serve as our analog reference.

Source Difference Noise floor Time spectrogram
Nintendo Stereo AV Cable
With DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000-fnvw vs Nintendo Stereo AV Cagdg.png File:NF SP B Nintendo Stereo AV Capxa -1Silence.png
Nintendo Stereo AV Cable
With DOL-CPU(P)-10 		File:DA ALL AVG mdfourier-dac-48000-flcw vs Nintendo Stereo AV Cacom.png File:NF SP B Nintendo Stereo AV Caeoh -1Silence.png
Generic S-Video Cable
With DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000-focw vs Generic S-Video Cableayj.png File:NF SP B Generic S-Video Cablehey -1Silence.png
HD Retrovision SNES Component Cable
With DOL-CPU(P)-10 		File:DA ALL AVG mdfourier-dac-48000-fdgh vs HD Retrovision SNES Cbet.png File:NF SP B HD Retrovision SNES Claa -1Silence.png
Bitfunx GameCube Component Cable
Swapped L/R 		File:DA ALL AVG mdfourier-dac-48000-fqdv vs Bitfunx GameCube Compryx.png File:NF SP B Bitfunx GameCube Compgxk -1Silence.png
GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
DC Offset 		File:DA ALL AVG mdfourier-dac-48000 vs GCVideo-DVI v3.1 + Pokjn.png File:NF SP B GCVideo-DVI v3.1 + Ponls -1Silence.png
GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
DC Offset + Sample Rate Hack [1] 		File:DA ALL AVG mdfourier-dac-48000 vs GCVideo-DVI v3.1 + Pocmy.png File:NF SP B GCVideo-DVI v3.1 + Povoh -1Silence.png
  1. ↑ https://github.com/ikorb/gcvideo/blob/main/Firmware/README.md#advanced-settings

Blackmagic Intensity Shuttle

Using CS42526 and ADV7604.

Its audio input suffer from internal interference.

Source Difference Noise floor Time spectrogram
Nintendo Stereo AV Cable
With DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000-fnca vs Nintendo Stereo AV Caibi.png File:NF SP B Nintendo Stereo AV Cayrg -1Silence.png
Nintendo Stereo AV Cable
With DOL-CPU(P)-10 		File:DA ALL AVG mdfourier-dac-48000-fpmp vs Nintendo Stereo AV Canww.png File:NF SP B Nintendo Stereo AV Casvs -1Silence.png
Generic S-Video Cable
With DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000-fcar vs Generic S-Video Cablebzy.png File:NF SP B Generic S-Video Cableeiy -1Silence.png
Hyperkin 3-in-1 HDTV Cable
With DOL-CPU-11
HD Retrovision SNES Component Cable
With DOL-CPU(P)-10 		File:DA ALL AVG mdfourier-dac-48000-fpzp vs HD Retrovision SNES Cnlo.png File:NF SP B HD Retrovision SNES Cpzb -1Silence.png
Bitfunx GameCube Component Cable
Swapped L/R 		File:DA ALL AVG mdfourier-dac-48000-fylw vs Bitfunx GameCube Compekj.png File:NF SP B Bitfunx GameCube Compouj -1Silence.png
GCVideo-DVI v3.1
GCVideo-DVI v3.1
Sample Rate Hack [1]
  1. ↑ https://github.com/ikorb/gcvideo/blob/main/Firmware/README.md#advanced-settings

Hauppauge WinTV-HVR-1850

Using CX23888.

Its audio input suffer from internal interference.

Source Difference Noise floor Time spectrogram
Nintendo RF Modulator
With DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000-fxet vs Nintendo RF Modulatorvpm.png File:NF SP B Nintendo RF Modulatorfkx -1Silence.png
Nintendo Stereo AV Cable
With DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000-fuhn vs Nintendo Stereo AV Cafja.png File:NF SP B Nintendo Stereo AV Canze -1Silence.png
Generic S-Video Cable
With DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000-fywk vs Generic S-Video Cableirx.png File:NF SP B Generic S-Video Cablejca -1Silence.png

Open Source Scan Converter

Using PCM1862.

RetroTINK-5X Pro

Using PCM1808.

  • Difference
  • Nintendo Stereo AV Cable With DOL-CPU-11
    Nintendo Stereo AV Cable
    With DOL-CPU-11
  • Nintendo Stereo AV Cable With DOL-CPU(P)-10
    Nintendo Stereo AV Cable
    With DOL-CPU(P)-10
  • Generic S-Video Cable With DOL-CPU-11
    Generic S-Video Cable
    With DOL-CPU-11
  • HD Retrovision SNES Component Cable With DOL-CPU(P)-10
    HD Retrovision SNES Component Cable
    With DOL-CPU(P)-10
  • Bitfunx GameCube Component Cable Swapped L/R
    Bitfunx GameCube Component Cable
    Swapped L/R
  • GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter DC Offset
    GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
    DC Offset
  • GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter DC Offset + Sample Rate Hack
    GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
    DC Offset + Sample Rate Hack
  • Nintendo GameCube Component Video Cable + Nintendo Stereo AV Cable With DOL-CPU-11
    Nintendo GameCube Component Video Cable + Nintendo Stereo AV Cable
    With DOL-CPU-11
  • Nintendo GameCube Component Video Cable + Nintendo Stereo AV Cable With DOL-CPU(P)-10
    Nintendo GameCube Component Video Cable + Nintendo Stereo AV Cable
    With DOL-CPU(P)-10
  • Nintendo GameCube Component Video Cable + Generic S-Video Cable With DOL-CPU-11
    Nintendo GameCube Component Video Cable + Generic S-Video Cable
    With DOL-CPU-11
Source Difference Noise floor Time spectrogram
Nintendo Stereo AV Cable
With DOL-CPU-11
Nintendo Stereo AV Cable
With DOL-CPU(P)-10
Generic S-Video Cable
With DOL-CPU-11
HD Retrovision SNES Component Cable
With DOL-CPU(P)-10
Bitfunx GameCube Component Cable
Swapped L/R
GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
DC Offset
GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
DC Offset + Sample Rate Hack [1]
Nintendo GameCube Component Video Cable + Nintendo Stereo AV Cable
With DOL-CPU-11
Nintendo GameCube Component Video Cable + Nintendo Stereo AV Cable
With DOL-CPU(P)-10
Nintendo GameCube Component Video Cable + Generic S-Video Cable
With DOL-CPU-11
  1. ↑ https://github.com/ikorb/gcvideo/blob/main/Firmware/README.md#advanced-settings
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