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The official Modulation Arts FM Processor Torture Test is an 80 minute long collection of very difficult program material for FM processors. Download recordings of popular processors, and download the original and run it through your airchain to see how it measures up!
Available for download: Original, Omniatm 6EXi (MPX), Optimodtm 8500 (MPX), Optimodtm 8200 (L/R), DSP-Xtm Mini SE, DSPXtremetm, Breakaway Broadcast, and CRL Amigo-FM.
Warning: These files are FM Stereo MPX with 75us pre-emphasis.
Mind your ears (and speakers) -- do not play in a regular media player. Use MpxTool.
Also see the Table of Contents.
The torture test files can be downloaded below:
(alternate site: http://www.totradio.com/mpx/torturecd/ )
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Orban Optimod 8500
Preset: Impact (Less-More 4.0), 75us
MPX output, 192 KHz
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Size: 1.3 GB
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Omnia 6EXi
Preset: Rock'n'Roll, 75us
MPX output, 192 KHz
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Size: 1.3 GB
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Orban Optimod 8200
Preset: Rock-dense (Less-More 9.0), 75us
L/R output, 44.1 KHz Stereo
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Size: 620 GB
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BW Broadcast DSPXtreme FMHD
Preset: CHR-HOT, 75us
MPX output, 192 KHz
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Size: 1.2 GB
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BW Broadcast DSP-X Mini SE
Preset: CHR, 75us
MPX output, 192 KHz
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Size: 1.1 GB
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Breakaway Broadcast
Preset: Plutonium, 75us (More dynamic)
Preset: Amsterdam, 75us (Louder)
L/R output, 48 KHz Stereo
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Plutonium
Size: 663 MB
Amsterdam
Size: 683 MB
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CRL Amigo FM
Factory Default settings (details), 75us pre-emphasis
L/R output, 44.1 KHz Stereo
Submitted by: Kevin Tekel
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Size: 570 MB
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Original CD Audio
Unprocessed, No pre-emphasis
44.1 KHz Stereo
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Size: 475 MB
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DMPX index files
Allows convenient A/B comparison in MpxTool.
To assign audio processors to the A/B buttons in MpxTool,
simply edit /dmpx/meta/00index in notepad.
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The files are very large -- we strongly recommend Free Download Manager for accelerated, reliable downloading.
The recordings were done in the following manner:
- Original 80-minute file was played in one sweep directly into the processor. The Output was recorded with a LynxTWO audio card.
- The Optimod 8500 and Omnia 6 EXi were recorded directly from the composite output, 192khz 1ch.
The 8200 was recorded from the Analog L/R outputs, pre-emphasis on. 44.1khz, 2ch.
Since the 8200 does not have a composite clipper, there is no advantage to using the composite output of the 8200.
The stereo encoder in MpxTool produces identical results in realtime, and standard stereo recording uses only half the data rate of composite.
- The DSPXtreme and DSP-X Mini recordings were supplied by BW Broadcast.
- The Breakaway FM recording was done using two computers with $30 motherboards (ASRock 775Dual-VSTA), using on-board Realtek HD Audio, Analog Line Out -> Analog Line In.
MPX recordings are an accurate, measurable and repeatable way to compare the sound of airchains,
no matter where they're located. Modulation monitors tell the truth - if the oscilloscope, spectrum analyzer,
and modulation monitor all say the signal is within bounds, it's ready for the airwaves.
We gratefully accept submissions of this torture test from your air-chain or processor. Since MPX files get very large, we provide an FTP site for uploading.
FTP site address: ftp.powweb.com
User name: mpxclips
Password: mpxclips
To see how your air-chain compares to other processors, run the entire original file through in one sweep (no preset changes!) and record the composite with either MpxTool Full version, or your favourite wave recorder.
Then create a DMPX descriptor file for your recording (plain text files - see the downloadable DMPX files above) and assign it to one of the six slots in mpxtool (A through F) by editing the torture.dmpx_meta.txt file.
Using DMPX files is not required. To play multiple files in MpxTool, simply drop multiple files onto MpxTool at the same time. However, DMPX provides a convenient way to index long recordings.
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