Discomfort Designs

Discomfort Designs Riemann's Grave Filter

$409.00
$409.00
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Details

A stereo filter designed for movement, unpredictability and sonic experimentation

The Discomfort Designs Riemann's Grave is an experimental stereo filter that combines powerful tone shaping, unusual modulation and harmonic manipulation in a pedal designed to create sounds that are constantly moving and evolving.

At its heart is a resonant multimode filter capable of everything from subtle tonal movement to dramatic sweeps, whistles and howls. Rather than relying solely on traditional modulation shapes, Riemann's Grave can animate the filter using a random Sample & Hold waveform or the more fluid Wandering Sine, creating movement that ranges from rhythmic and abrupt to smooth, drifting and unpredictable.

The Zeta Function adds another dimension by introducing additional harmonic content before it reaches the filter. Three distinct processing modes provide wave folding, bit crushing or octave-up distortion, allowing you to move from subtle saturation and added texture to fractured digital sounds and aggressive harmonic distortion. Feeding these harmonically rich signals into the resonant filter opens the door to an enormous range of unusual textures.

For even greater unpredictability, the Jitter function introduces movement to other parameters within the pedal, allowing settings to shift and evolve in unexpected ways. Rather than simply repeating the same modulation cycle, Riemann's Grave can feel almost alive, producing subtle variations, sudden changes and happy accidents as you play.

Whether you're looking for animated stereo filtering, unusual modulation, glitchy textures, aggressive resonant sweeps or sounds that seem to have a mind of their own, Riemann's Grave is a unique creative tool built for experimentation and discovery.

 

Discomfort Designs Riemann's Grave Features

• Experimental stereo multimode filter

• High resonance settings capable of dramatic whistles and howls

• Random Sample & Hold modulation

• Wandering Sine modulation for smooth, evolving movement

• Zeta Function adds saturation and harmonic content before filtering

• Three Zeta processing modes: wave folding, bit crushing and octave-up distortion

• Jitter function introduces unpredictable movement to other parameters

• Designed for evolving, unpredictable and experimental sounds

• Power: 9V DC

• Current Draw: 100mA

Specs

Specs

Type Filter
Condition New
Power 9V DC
Current Draw 100mA
Power supply included No
Manufacturer Warranty 1 year
Country of Origin United States
Shipping & Returns

FREE SHIPPING

  • Free shipping within Canada.
  • Free shipping to the USA.
  • Free shipping on international orders over 520$.

    Visit the Shipping page for more.

Fast Delivery

  • Canada : 1 - 2 business days
  • USA : 1 - 2 business days
  • Rest of the world: 3 - 5 business days.

Hassle-Free Returns

You have 45 days to test your new gear. If you choose to return it, we’ll send a full refund. It’s that simple: no bogus restocking fees or charges.

Visit the Returns page for more.

FAQ

Frequently Asked Questions

  • How can I tell if an item is in stock? +

    Each product page shows an availability status.

    • In stock items are ready to ship.

    • Out of stock items are currently unavailable.

    You can enter your email to be notified when an item is back in stock.

  • Where are you located? +

    We’re based in Blainville, Quebec, Canada.

  • When will my order ship? +

    Orders placed before 12 PM EST ship the same business day.

    Tracking details are sent shortly after purchase.

  • How much does shipping cost? +

    Most orders ship free to Canada and the US.

    International orders ship free on purchases over $520 CAD.

  • Which shipping methods do you use? +

    Orders ship via UPS Expedited by default.

    For faster delivery, you can select UPS Express Saver at checkout.

  • How long does shipping take? +

    Typical delivery times are:

    • Canada: 2–3 business days with UPS Expedited, 1 business day with UPS Express Saver

    • USA: 2–3 business days with UPS Expedited, 1 business day with UPS Express Saver

    • International: 3–5 business days with UPS Expedited, 2–3 business days with UPS Express Saver

  • Which payment methods do you accept? +

    We accept all major credit cards and PayPal.

    Financing options are available through Klarna and RBC PayPlan.

  • Do Canadian customers pay sales tax? +

    Yes. Sales tax is applied based on your province of residence:

    • Alberta: 5%

    • British Columbia: 5%

    • Manitoba: 5%

    • New Brunswick: 15%

    • Newfoundland and Labrador: 15%

    • Northwest Territories: 5%

    • Nova Scotia: 14%

    • Nunavut: 5%

    • Ontario: 13%

    • Prince Edward Island: 15%

    • Quebec: 14.975%

    • Saskatchewan: 5%

    • Yukon: 5%

  • Do USA customers pay import fees? +

    Yes. Starting August 29, 2025, all US-bound shipments will be subject to duties, taxes, and brokerage fees.

    These charges are determined by US Customs and collected by UPS at delivery.

  • Do international customers pay import fees? +

    Yes. International shipments may be subject to duties and taxes.

    These charges are set by the destination country’s customs authority and collected by UPS at delivery.

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