Audio quality tests: Difference between revisions

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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.

Source Difference Noise floor Time spectrogram
Nintendo Stereo AV Cable
DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000 vs Nintendo Stereo AV Cajyg.png File:NF SP B Nintendo Stereo AV Caxwc -1Silence.png
Nintendo Stereo AV Cable
DOL-CPU(P)-10 		File:DA ALL AVG mdfourier-dac-48000 vs Nintendo Stereo AV Caxiq.png File:NF SP B Nintendo Stereo AV Caulg -1Silence.png
Generic S-Video Cable
DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000 vs Generic S-Video Cabletom.png File:NF SP B Generic S-Video Cablegwa -1Silence.png
HD Retrovision SNES Component Cable
DOL-CPU(P)-10 		File:DA ALL AVG mdfourier-dac-48000 vs HD Retrovision SNES Cejl.png File:NF SP B HD Retrovision SNES Cila -1Silence.png
Bitfunx GameCube Component Cable File:DA ALL AVG mdfourier-dac-48000 vs Bitfunx GameCube Compbfo.png File:NF SP B Bitfunx GameCube Compbxh -1Silence.png
GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter File:DA ALL AVG mdfourier-dac-48000 vs GCVideo-DVI v3.1 + Posqz.png File:NF SP B GCVideo-DVI v3.1 + Powym -1Silence.png
GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
Sample Rate Hack [1] 		File:DA ALL AVG mdfourier-dac-48000 vs GCVideo-DVI v3.1 + Poeoo.png File:NF SP B GCVideo-DVI v3.1 + Popdf -1Silence.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.

Source Difference Noise floor Time spectrogram
Nintendo RF Modulator
DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000 vs Nintendo RF Modulatorqxl.png File:NF SP B Nintendo RF Modulatorvhh -1Silence.png
Nintendo Stereo AV Cable
DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000 vs Nintendo Stereo AV Cafwu.png File:NF SP B Nintendo Stereo AV Carkb -1Silence.png
Generic S-Video Cable
DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000 vs Generic S-Video Cableczp.png File:NF SP B Generic S-Video Cablefmb -1Silence.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.

Source Difference Noise floor Time spectrogram
Nintendo Stereo AV Cable
DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000 vs Nintendo Stereo AV Cadrx.png File:NF SP B Nintendo Stereo AV Caswr -1Silence.png
Nintendo Stereo AV Cable
DOL-CPU(P)-10 		File:DA ALL AVG mdfourier-dac-48000 vs Nintendo Stereo AV Camlz.png File:NF SP B Nintendo Stereo AV Cavpk -1Silence.png
Generic S-Video Cable
DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000 vs Generic S-Video Cablehvi.png File:NF SP B Generic S-Video Cableucu -1Silence.png
HD Retrovision SNES Component Cable
DOL-CPU(P)-10 		File:DA ALL AVG mdfourier-dac-48000 vs HD Retrovision SNES Cyvn.png File:NF SP B HD Retrovision SNES Clxg -1Silence.png
Bitfunx GameCube Component Cable File:DA ALL AVG mdfourier-dac-48000 vs Bitfunx GameCube Compyeg.png File:NF SP B Bitfunx GameCube Compqpd -1Silence.png
GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter File:DA ALL AVG mdfourier-dac-48000 vs GCVideo-DVI v3.1 + Povjc.png File:NF SP B GCVideo-DVI v3.1 + Ponzs -1Silence.png
GCVideo-DVI v3.1 + Portta HDMI to YPbPr Converter
Sample Rate Hack [1] 		File:DA ALL AVG mdfourier-dac-48000 vs GCVideo-DVI v3.1 + Pocsl.png File:NF SP B GCVideo-DVI v3.1 + Ponie -1Silence.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.

Source Difference Noise floor Time spectrogram
Nintendo RF Modulator
DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000 vs Nintendo RF Modulatorrzn.png File:NF SP B Nintendo RF Modulatorvse -1Silence.png
Nintendo Stereo AV Cable
DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000 vs Nintendo Stereo AV Caifm.png File:NF SP B Nintendo Stereo AV Cairq -1Silence.png
Generic S-Video Cable
DOL-CPU-11 		File:DA ALL AVG mdfourier-dac-48000 vs Generic S-Video Cablebib.png File:NF SP B Generic S-Video Cablelgk -1Silence.png
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