https://junkerhq.net/MDFourier/

 

MDFourier

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  * Description
  * How it works
  * Output
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What is MDFourier

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MDFourier is an open source software solution created to compare
audio signatures and generate a series of graphs that show how they
differ. The software consists of two separate programs, one that
produces the signal for recording from the console and the other that
analyses and displays the audio comparisons.

The information gathered from the comparison results can be used in a
variety of ways: to identify how audio signatures vary between
systems, to detect if the audio signals are modified by audio
equipment, to find if modifications resulted in audible changes, to
help tune emulators, FPGA implementations or mods, etc.
MDF

How MDFourier works

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                                 MDF

MDFourier takes two signals, the first one is designated as the
Reference file. The second one is the file under scrutiny, and is
referred to as Comparison file.

The first step is loading the Tone Generator to the desired system
that will be analyzed. The process for this varies with each
platform: from placing the software in a flash cart, burning a CD-ROM
or using a custom loader.

The next step is preparing an audio capture device and a computer, in
order to record an audio file. Once the audio card is ready, and the
cables are hooked up from the system to the audio inputs, the
recording process is started from the computer and the Tone Generator
should be activated from the system under analysis.

After a short lapse, usually around one minute, the Tone Generator
will display a message indicating that the recording process can be
stopped. When at least two files are available, one to be used as
reference and one to be used as comparison file; a comparison can be
made with the Analysis Software from the computer.

Sample Output

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                                 MDF
                                 MDF

Current Platforms

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Sega Mega Drive / Genesis

[md]

Released and has support for Mega/Sega CD

NEC PC Engine Turbografx-16

[pce]

Released and has support for CD-ROM^2 and Super CD-ROM^2

Unreleased Platforms

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Nintendo NES / Famicom

[nes]

Release pending for expansion audio support. You can contact us if
you want to use the current fully working version.

Developed and designed by Pinobatch

Nintendo GameBoy

[gb]

Release pending. You can contact us if you want to use the current
fully working version.

Developed and designed by Pinobatch

Sega Master System

[sms]

Release pending. You can contact us if you want to use the current
fully working version.

Developed and designed by Pinobatch

Super Nintendo / Super Famicom

[snes]

Release pending. You can contact us if you want to use the current
version.

Developed and designed by

David Viens.

Downloads

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MDF

  * Full documentation: [Plain HTML] [PDF] [HTML 5]
  * Binaries: (These include profiles and Analysis Software, you'll
    need some tone generators or audio files from below)
      + Windows (64-bit version): MDFourier 1.10
      + Apple Silicon (macOS-ARM64): MDFourier (If you have any
        issues you can use the offline version 1.10)
      + MacOS (64-bit and 32-bit versions): MDFourier (Minimum macOS
        required: macOS 10.9 Mavericks, if you have any issues you
        can use the offline version 1.01))
      + Linux: Please build from source.
  * Tone Generators:
      + Flac files for sound cards and audio equipment
      + Tone Generators Download the 240p testSuite for your platform
  * Source code.
  * MDFourier Notes A series of small documents with interesting
    information we've found.
  * Audio Recordings (for use as Reference or Comparison):
      + MegaDrive/Sega Genesis and Sega CD recordings 2020-06-14
      + PC Engine/Turbografx 16 and CD-ROM2/Super-CDROM2 recordings
        2020-06-14

Help MDFourier

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First of all, developers for new platforms are needed. If you know
how to develop for a platform and want to contribute, please contact
me.

If you like what I do or want to help support the project financially
you can do so at the links below.

This is not required, as all projects are always open source and free
to use.

  * Patreon
  * Ko-fi
  * Paypal

Chibi

Contact

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  * Twitter
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