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FDP Forum / Miscellaneous and Non-Fender Topics / WMD Geiger Counter and BIT Mask.

Modal Magic

MBJ, Highway Hound.

You Can't Bend It Aussie!
Dec 18th, 2017 06:01 PM   Edit   Profile   Print Topic   Search Topic

Can anyone explain, in knuckle-dragger terms, what BIT masking is and does? The WMD Geiger Counter states "In Mask mode, the signal is filtered through a number (0 to 255). This mode can be used to reduce noise and add gain."

Reducing BITs reduces resolution and increases distortion (generally, sometimes it clarifies and smooths things out depending on which wave table is selected). Sort of understand how BIT reduction works but not when in Mask mode.

Geiger Counter

Peegoo
Contributing Member
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Curled up

in the fecal position
Dec 18th, 2017 07:14 PM   Edit   Profile   Print Topic   Search Topic

Hmmm never seen this pedal before.

The pedal first puts the guitar's analog signal through an AD converter. The now-digital signal is rendered in an 8-bit waveform, and that waveform can be sent through on 255 preset wave tables.

Bit masking appears to be a bit-averaging filter that further smooths the waveform before it hits the preset wave table (envelope filter, probably).

At the output, the signal goes through a DA converter and the analog signal goes to your amp.

This appears to be a circuit-bent digital sound generator that's triggered by the input signal and optimized for guitar. It begins as a distortion effect but instead of merely pushing up the amplitude in the signal and distorting the basic wave shape, it gives you greater control over the shape of the waveform and harmonic overtones by allowing you to control the waveform by how it's digitally sliced.

There have been others like this (Destroyer, Pulsemonger, etc.) that do similar stuff.

It's not a ring mod, but it's probably halfway between a standard distortion effect and a ring mod.

Mick Reid
Contributing Member
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Australia

American-made in Oz!!
Dec 18th, 2017 07:14 PM   Edit   Profile   Print Topic   Search Topic

I thought this was going be an "Extreme Prepper" thread!!!

Then I clicked the link...

:^)

Peegoo
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Dec 18th, 2017 08:52 PM   Edit   Profile   Print Topic   Search Topic

It is...if you're prepping for super guitar wackiness!

Peegoo
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Curled up

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Dec 19th, 2017 01:13 PM   Edit   Profile   Print Topic   Search Topic

The PMLTHOOT (person most likely to have one of these) is Reverendrob.

He is big into sound paintings and ambient sonic abstrac..tation [George Dubya smirk]

reverendrob
FDP Data Goon
Moderator

We all want

our time in hell
Dec 20th, 2017 05:50 AM   Edit   Profile   Print Topic   Search Topic

I've looked at them, but I have enough rack units in the same realm and then some.

Basically it's a filtered bitcrusher/sonic destroyer with a gain circuit.


reverendrob
FDP Data Goon
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We all want

our time in hell
Dec 20th, 2017 05:51 AM   Edit   Profile   Print Topic   Search Topic

And "mask mode" is just "Program 0-255" that the designers put in, variations on a theme/level of the filter/etc.

Modal Magic

MBJ, Highway Hound.

You Can't Bend It Aussie!
Dec 20th, 2017 11:07 PM   Edit   Profile   Print Topic   Search Topic

Well... I'd being eyeing of one of these for a long time but was uncertain as to whether I wanted one or not. I wanted a bit crusher and was hoping this would be it and never to GAS again for this type of pedal. A few observations:

- For a while the wave tables sounded similar to my ear so I thought it was a bit of a waste. After some time the ear adjusts and there is differences to be heard.

- The instructions are sort off clear what Mask mode does but sonically it varies depending on what wave table is selected. Not an easy one to wrap my head around.

- If it only had Bit Depth and Sample Rate controls it would be almost useless. Many of the wave tables are static or interference sounds that aren't affected by the guitar input. and it's only due to the flexibility of the other controls that useable sounds can be had from all wave tables (useable being up to individual interpretation). There never seems to be consistency with how the controls affect the wave table. Some times it's intuitive, sometimes counter intuitive. It's a strange pedal indeed.

- It does some amazing sounding OD, distortion and gated fuzz sounds. I does weird really well too.

It's an experimenters dream, should keep me going for years.

FDP Forum / Miscellaneous and Non-Fender Topics / WMD Geiger Counter and BIT Mask.




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