Difference between revisions of "Audio quality tests"

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Using [http://junkerhq.net/MDFourier/ MDFourier] 1.07d (15-12-2021) with this <span class="plainlinks">[https://files.extremscorner.org/gamecube/audio/comparisons/mdfourier-dac-48000.flac reference file]</span>.
 
Using [http://junkerhq.net/MDFourier/ MDFourier] 1.07d (15-12-2021) with this <span class="plainlinks">[https://files.extremscorner.org/gamecube/audio/comparisons/mdfourier-dac-48000.flac reference file]</span>.
  
−
The 32kHz sample rate is most commonly used by licensed software. It is upsampled to 48kHz in hardware prior to final output.
+
The 32kHz sample rate is most commonly used by licensed software. It is upsampled to 48kHz in hardware prior to final output. <br />
 +
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.
 
A 15kHz white screen was displayed to induce audible noise.
Line 107: Line 108:
 
Using [http://junkerhq.net/MDFourier/ MDFourier] 1.07d (15-12-2021) with this <span class="plainlinks">[https://files.extremscorner.org/gamecube/audio/comparisons/mdfourier-dac-48000.flac reference file]</span>.
 
Using [http://junkerhq.net/MDFourier/ MDFourier] 1.07d (15-12-2021) with this <span class="plainlinks">[https://files.extremscorner.org/gamecube/audio/comparisons/mdfourier-dac-48000.flac reference file]</span>.
  
−
The nominal sample rate is 54MHz÷1124, rather than 54MHz÷1125. This is reflected in the frame duration of the standard equipment test. <br />
+
The 48kHz sample rate is most commonly used by homebrew software and [[Audio Streaming|streaming audio]] in licensed software. <br />
−
The 48kHz sample rate is most commonly used by homebrew software and [[Audio Streaming|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.
 
A 15kHz white screen was displayed to induce audible noise.

Revision as of 14:18, 23 December 2021

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.

  • Difference
  • DA ALL AVG mdfourier-dac-48000 vs Nintendo Stereo AV Cajyg.png

    Nintendo Stereo AV Cable
    DOL-CPU-11

  • DA ALL AVG mdfourier-dac-48000 vs Nintendo Stereo AV Caxiq.png

    Nintendo Stereo AV Cable
    DOL-CPU(P)-10

  • DA ALL AVG mdfourier-dac-48000 vs Generic S-Video Cabletom.png

    Generic S-Video Cable
    DOL-CPU-11

  • DA ALL AVG mdfourier-dac-48000 vs HD Retrovision SNES Cejl.png

    HD Retrovision SNES Component Cable
    DOL-CPU(P)-10

  • DA ALL AVG mdfourier-dac-48000 vs Bitfunx GameCube Compbfo.png

    Bitfunx GameCube Component Cable

  • DA ALL AVG mdfourier-dac-48000 vs GCVideo-DVI v3.1 + Posqz.png

    GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter

  • DA ALL AVG mdfourier-dac-48000 vs GCVideo-DVI v3.1 + Poeoo.png

    GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
    Sample Rate Hack

Source Difference Noise floor Time spectrogram
Nintendo Stereo AV Cable
DOL-CPU-11 		200px 200px T SP B S1220A Nintendo Stereo AV Cable 32kHz (1).png
Nintendo Stereo AV Cable
DOL-CPU(P)-10 		200px 200px T SP B S1220A Nintendo Stereo AV Cable 32kHz (2).png
Generic S-Video Cable
DOL-CPU-11 		200px 200px T SP B S1220A Generic S-Video Cable 32kHz.png
HD Retrovision SNES Component Cable
DOL-CPU(P)-10 		200px 200px T SP B S1220A HD Retrovision SNES Component Cable 32kHz.png
Bitfunx GameCube Component Cable 200px 200px T SP B S1220A Bitfunx GameCube Component Cable 32kHz.png
GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter 200px 200px T SP B S1220A GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter 32kHz.png
GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
Sample Rate Hack [1] 		200px 200px T SP B S1220A GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter 32kHz SRH.png
  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.

  • Difference
  • DA ALL AVG mdfourier-dac-48000 vs Nintendo RF Modulatorqxl.png

    Nintendo RF Modulator
    DOL-CPU-11

  • DA ALL AVG mdfourier-dac-48000 vs Nintendo Stereo AV Cafwu.png

    Nintendo Stereo AV Cable
    DOL-CPU-11

  • DA ALL AVG mdfourier-dac-48000 vs Generic S-Video Cableczp.png

    Generic S-Video Cable
    DOL-CPU-11

Source Difference Noise floor Time spectrogram
Nintendo RF Modulator
DOL-CPU-11 		200px 200px T SP B CX23888 Nintendo RF Modulator 32kHz.png
Nintendo Stereo AV Cable
DOL-CPU-11 		200px 200px T SP B CX23888 Nintendo Stereo AV Cable 32kHz.png
Generic S-Video Cable
DOL-CPU-11 		200px 200px T SP B CX23888 Generic S-Video Cable 32kHz.png

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.

  • Difference
  • DA ALL AVG mdfourier-dac-48000 vs Nintendo Stereo AV Cadrx.png

    Nintendo Stereo AV Cable
    DOL-CPU-11

  • DA ALL AVG mdfourier-dac-48000 vs Nintendo Stereo AV Camlz.png

    Nintendo Stereo AV Cable
    DOL-CPU(P)-10

  • DA ALL AVG mdfourier-dac-48000 vs Generic S-Video Cablehvi.png

    Generic S-Video Cable
    DOL-CPU-11

  • DA ALL AVG mdfourier-dac-48000 vs HD Retrovision SNES Cyvn.png

    HD Retrovision SNES Component Cable
    DOL-CPU(P)-10

  • DA ALL AVG mdfourier-dac-48000 vs Bitfunx GameCube Compyeg.png

    Bitfunx GameCube Component Cable

  • DA ALL AVG mdfourier-dac-48000 vs GCVideo-DVI v3.1 + Povjc.png

    GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter

  • DA ALL AVG mdfourier-dac-48000 vs GCVideo-DVI v3.1 + Pocsl.png

    GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
    Sample Rate Hack

Source Difference Noise floor Time spectrogram
Nintendo Stereo AV Cable
DOL-CPU-11 		200px 200px T SP B S1220A Nintendo Stereo AV Cable 48kHz (1).png
Nintendo Stereo AV Cable
DOL-CPU(P)-10 		200px 200px T SP B S1220A Nintendo Stereo AV Cable 48kHz (2).png
Generic S-Video Cable
DOL-CPU-11 		200px 200px T SP B S1220A Generic S-Video Cable 48kHz.png
HD Retrovision SNES Component Cable
DOL-CPU(P)-10 		200px 200px T SP B S1220A HD Retrovision SNES Component Cable 48kHz.png
Bitfunx GameCube Component Cable 200px 200px T SP B S1220A Bitfunx GameCube Component Cable 48kHz.png
GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter 200px 200px T SP B S1220A GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter 48kHz.png
GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
Sample Rate Hack [1] 		200px 200px T SP B S1220A GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter 48kHz SRH.png
  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.

  • Difference
  • DA ALL AVG mdfourier-dac-48000 vs Nintendo RF Modulatorrzn.png

    Nintendo RF Modulator
    DOL-CPU-11

  • DA ALL AVG mdfourier-dac-48000 vs Nintendo Stereo AV Caifm.png

    Nintendo Stereo AV Cable
    DOL-CPU-11

  • DA ALL AVG mdfourier-dac-48000 vs Generic S-Video Cablebib.png

    Generic S-Video Cable
    DOL-CPU-11

Source Difference Noise floor Time spectrogram
Nintendo RF Modulator
DOL-CPU-11 		200px 200px T SP B CX23888 Nintendo RF Modulator 48kHz.png
Nintendo Stereo AV Cable
DOL-CPU-11 		200px 200px T SP B CX23888 Nintendo Stereo AV Cable 48kHz.png
Generic S-Video Cable
DOL-CPU-11 		200px 200px T SP B CX23888 Generic S-Video Cable 48kHz.png
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