Overview Hear it How it works Record the world Morph modesDraw / Path / Glue / Omni Interface Honest fit Pricing FAQ Docs Free demo Buy · €49
Sound design & impulse-response construction · Windows VST3

Stop searching for the sound.
Build what yours is missing.

Start with the sound already in your track.

Put Anvil on a playing instrument or audio track and design a response around the tone, resonance, texture, depth, space and identity you want. You hear the response directly while you tweak. Bake only when you want that response as a reusable WAV IR.

Download free demo Get Impulse Anvil · €49 Hear transformations

Build from two sources · Draw / Path / Glue / Omni · Bake reusable WAV IRs · 126 included IRs · Two licence seats

Platforms: Windows 10/11 VST3 is the primary supported commercial release. macOS AU/VST3 testing build is also available with the same demo/full-license functionality; the macOS testing build is not Developer ID signed or notarized by Apple.

Impulse Anvil impulse-response design workstation interface
What is missing? Design it.

A and B are material. Build the response you want the sound to pass through and hear it directly on the playing track as you tweak.

Start with what you haveUse the sound already in the track as the thing you want to reshape.
Design the missing characterBuild tone, resonance, texture, depth, space and identity into the response.
One response, several qualitiesA custom response can reshape spectrum, resonance, decay, space and stereo character together.
Keep it your waySave the whole Anvil setup as a preset, or Bake the response itself as a portable WAV.
€49 full licenseThe complete workstation with two licence seats.
One response. Several qualities.

Hear what one Anvil transformation can change.

Watch the workstation in motion, then follow one transformation all the way through: untreated source → exact IR → Anvil result. Download the IR and try the same response on your own audio.

Product showcase

See Impulse Anvil in motion.

Watch the workflow first, then hear one transformation broken into its dry source, exact IR and Anvil result below.

YouTube loads only after you press play. Watch on YouTube ↗
Reproducible transformation

This sound. Through this IR. Becomes this.

Mystic March 2 is the exact response used here. Listen to each part separately, then download the WAV and test it on your own material.

01 This sound

Dry synth chords

The untreated four-second source.

Dry source0:00
02 Through this IR

Mystic March 2

The exact 1.339-second stereo WAV response.

Impulse response0:00
03 Becomes this

Through Impulse Anvil

The same source processed with Mystic March 2.

Anvil result0:00
Try the exact response.Use Mystic March 2 on your own audio.
Download this IR · WAV

Load the WAV into a compatible convolution workflow or Impulse Anvil and hear how the same response behaves on your own source.

More transformations

Melody

Piano

One performance. A completely different direction.

Dry → Anvil0:00
Voice

Vocal

Turn a dry phrase into an intimate layer, unusual space or identity effect.

Dry → Anvil0:00
Guitar

Guitar

Reshape tone, resonance and space, or transform existing cabinet responses.

Dry → Anvil0:00
Why this works

Design the response
your sound passes through.

Impulse Anvil moves the creative decision one step earlier. Instead of searching for a finished response, you build the response you want to hear, then use it on the sound already in your track.

01

Load material

Choose two impulse responses, compatible WAV recordings, textures or found sounds. Prepare A and B independently.

02

Build the relationship

Choose how the sources meet. Morph them, reveal what they share or what differs, then Draw, Path, Glue or Omni the movement you want.

03

Keep it your way

Keep using the response directly in Anvil. Save the whole setup as a preset in OPTIONS, or Bake the response as a WAV when you want a portable file.

New to Anvil? Start the Basics Course →
The mental model

The IR is not the preset.
It is the thing you are building.

Two pieces of acoustic material go in. One designed response comes out.

NEW IR→HEAR IT IN ANVIL·OPTIONAL BAKE → WAV
Record the world. Put it inside your sound.

Real material creates
unrepeatable complexity.

Water, stone, metal, paper, rooms, machinery, footsteps, environmental noise and small accidental sounds can all become creative source material.

Found-sound convolution

A recording does not need to resemble a traditional reverb.

Short sounds can create tight tonal coloration and resonance. Longer recordings can introduce evolving spaces, irregular tails and rhythmic behavior that changes how a loop or performance is perceived.

Because the material begins in the real world, the result can carry irregularity and complexity that would be difficult to design deliberately with ordinary synthesis or modulation.

Record something that interests you. Load it. Hear what it does.

Melody and instruments

Escape a familiar identity

Push piano, synth, guitar or other melodic material toward a new tone, resonance, space or rhythmic impression.

Drums and rhythm

Short organic spaces

Create tight resonant, metallic or organic responses without automatically washing out the groove.

Voice and selected words

Distinctive layers and throws

Turn a dry phrase into a filtered double, intimate layer, strange resonance or selected-word identity effect.

Reusable discoveries

Build a personal IR library

Bake useful accidents before they disappear, name the WAV and use it again in compatible convolution software or another Impulse Anvil transformation.

A and B can meet in different ways

Choose the relationship,
not just the amount.

The full workstation contains 21 Morph relationships. You do not need to learn all of them first. Start with the question you are trying to answer.

Impulse Anvil Morph Mode browser showing the relationship library and selected-mode explanation
Choose by intention first. The browser then explains what the relationship is for, how Morph behaves and the deeper technical model.
Core Morph · Residual / Decompose · Acoustic Interaction

Sometimes you want a hybrid. Sometimes you want the difference.

The mode browser keeps the full library organized and explains what each relationship is useful for, how Morph behaves and what is happening underneath.

  • Core Morph: direct, spectral and stereo relationships.
  • Residual / Decompose: shared material, unique material and different kinds of leftovers.
  • Acoustic Interaction: compound, transfer, magnitude/phase and more experimental structural relationships.
  • Draw, Path, Glue and Omni can control depth through the selected relationship where supported by the mode.
Blend

Build a hybrid

Move from one prepared response toward another directly, spectrally or across stereo structure.

Split

Let different regions come from different places

Divide spectral or stereo ownership so A and B do not have to contribute in the same way everywhere.

Reveal

Hear what is shared - or what remains

Use Common, Unique, Difference and Residual relationships when the contrast between A and B is more interesting than a normal blend.

Transform

Build relationships neither source contains alone

Nest, Transfer, Ghost, Eclipse and Spectral Time Shear push A/B interaction into more deliberately constructed territory.

Explore the Morph relationships
Draw movement into the IR

Paint it. Route it. Glue it.
Make the gesture become time.

The curve display is now a construction surface. Draw controls the relationship, Path routes source-time, Glue assembles pieces, and Omni Path makes the full 2-D gesture contribute to output time.

Impulse Anvil Draw mode with an authored A to B curve
Draw — paint the relationship.
Impulse Anvil Path moving forward backward and forward through source time
Path — route through source-time.
Impulse Anvil Glue Path with separate authored source-time strokes
Glue Path — assemble a new timeline from pieces.
Draw

Paint how A and B change

Draw the A/B or relationship movement directly through the IR timeline.

Path

Move through source-time

Horizontal travel is the clock. Move right to read later source material or left to revisit earlier material. Vertical movement changes A/B or relationship depth.

Glue Path

Assemble a new timeline from pieces

Each stroke becomes the next piece of the output. Glue keeps its own horizontal route timing and remains independent of Lerp Start and Lerp Time.

Omni Path

Make the whole gesture become time

X still reads the selected Lerp source window and Y still controls A/B or relationship depth. Omni changes the clock: both horizontal and vertical travel create output duration.

Omni timing in one sentence: Lerp Start offsets the source window Omni reads, Lerp Time scales the width of that window, and the drawn 2-D travel distance is converted through that window into the final IR timeline.
Learn Draw, Path, Glue & OmniOmni Path workflow
See everything. Then lean into one part.

Overview for context.
Focus View for precision.

The six work areas stay visible in Overview. When one deserves attention, Focus View expands the same live controls instead of opening a second copy of the plugin.

Impulse Anvil Morph Focus View with large waveform and curve workspace
Morph Focus gives the authored response most of the workspace.
Impulse Anvil IR Browser comparing a candidate against the current source
Inspect and compare a candidate before committing it to A or B.

Focus the module

Open A, Morph, B, EQ, Edit or Out into a larger workspace. Use the Focus control or double-click genuine empty panel space; Esc or the exposed background brings the overview back.

Explore without losing the good version

Global Undo and Redo treat deliberate edits as meaningful steps, including IR loads, Morph changes and Draw/Path/Glue/Omni gestures. The local curve Undo remains available for curve editing.

Browse before you commit

The IR Browser lets you search, inspect waveforms and stats, compare against the current slot and load only when the candidate is worth keeping.

Focus ViewIR Browser
The useful accident becomes an asset

Find it. Refine it.
Turn it into a file.

Exploration is more valuable when the result can leave the experiment behind.

EXPERIMENT→BAKE→WAV→REUSE

Keep the exact response

Bake the prepared IR after source shaping, Morph construction, Edit, EQ and IR-output preparation.

Use it elsewhere

The full version writes a standard WAV impulse response for compatible convolution software and IR loaders.

Build another generation

Load a Bake back into A or B, combine it with something else and keep transforming the material.

One workstation

The complete path stays visible.

Overview shows where the response is being built. Focus View and the in-plugin browsers appear only when you need more room or more information.

Impulse Anvil interface overview

A / B material

Load factory IRs, your own IRs or compatible recordings. Inspect candidates in the IR Browser, then prepare Time, Gain, Color, Texture and Normalize per source.

Morph relationships

Choose from the organized Morph browser, set the direction where the relationship needs one, then use the Morph amount or author it through Draw, Path, Glue or Omni.

Focus when it matters

Expand A, Morph, B, EQ, Edit or Out without creating a second set of controls. The same state returns to Overview when Focus closes.

Edit, finish and Bake

Isolate the useful region, shape frequency and width, prepare the output IR and turn the final construction into a reusable WAV.

Impulse Anvil Edit Focus View
Edit the useful region.
Impulse Anvil EQ Focus View
Shape the spectrum.
Impulse Anvil Out Focus View
Prepare the finished response.
Visual system

Liquid Slate by default.
Personal when you want it.

The DESIGN workspace keeps appearance separate from sound. Browse, import, edit and save compatible designs without changing the IR you are building.

Impulse Anvil DESIGN workspace with theme browser and panel color editor
Liquid Slate remains the default design; the same workspace can manage imported and custom themes.

One design system

A, B, Morph, EQ, Edit and Out can inherit the global design or use compatible section-level color ownership.

Browse without leaving Anvil

The persistent DESIGN navigator opens the focused workspace for choosing and managing designs.

Shareable JSON

Compatible theme JSON can be imported, edited and saved without touching the audio engine.

Honest fit

Know what you are buying.

Impulse Anvil is built for deliberate sound transformation through custom impulse-response construction, exploration and WAV creation rather than continuous performance automation of every shaping control.

It is a strong fit when you want to...

  • Reshape a sound already in your track instead of immediately replacing it
  • Build new IRs from two pieces of acoustic or recorded material
  • Choose structural relationships instead of relying on one normal crossfade
  • Draw movement, revisit source-time or assemble a response with Glue Path
  • Bake portable WAV IRs and build a growing personal library

Important before you buy

  • Many IR-shaping edits rebuild the response and are intended for design rather than continuous live knob automation
  • Heavy analysis modes and very long or dense material can require more preparation time
  • Windows 10/11, 64-bit VST3 is the primary supported commercial release.
  • macOS AU/VST3 is available as a testing build with full plug-in functionality. It is not distributed with an Apple Developer ID signature and is not notarized by Apple, so manual Gatekeeper approval may be required.
  • Delivery is a digital ZIP bundle rather than an installer; no physical item is shipped
  • Use source recordings and IRs you own or are permitted to process
Pricing

Try the core idea.
Unlock the complete workstation.

Impulse Anvil opens in demo mode on both distribution tracks. The same purchased license unlocks the complete relationship library, authored movement and WAV creation workflow on Windows and on the macOS testing build.

Demo

Explore the sound

€0download

Test Impulse Anvil in your own DAW before purchasing.

  • Windows VST3 stable build; macOS AU/VST3 testing build available separately
  • 126 included IRs
  • Time Morph available
  • One Color row per IR
  • Periodic subtle demo noise
  • No A→B Lerp or WAV baking
Download free demo
Full license

Impulse Anvil Full License

€49one-time

The complete impulse-response design workstation.

  • Complete 21-mode Morph relationship library
  • Core Morph, Residual / Decompose and Acoustic Interaction families
  • Draw, Path, Glue and Omni Path authoring
  • Mode-aware A→B Lerp and standard WAV baking
  • Focus View, IR Browser, Morph browser and global Undo / Redo
  • Two Color rows per IR plus Texture Depth
  • Edit, visual EQ, width and final IR preparation
  • 2 seats per license
Get Impulse Anvil · €49Install and activation
Your exported IRs remain portable. Full-version bakes are standard WAV impulse responses, so a useful result does not have to stay trapped inside the preset that created it.
Setup and manual

Detailed when you need it.
Out of the way when you do not.

The documentation covers Quickstart, every Morph relationship, Draw, Path, Glue and Omni, Color/Texture, editing, EQ/output, Bake, installation, troubleshooting and focused creative workflows.

Open documentationDownloads and setupmacOS TestingCommunity support
FAQ

Clear answers before checkout.

What is Impulse Anvil?

Impulse Anvil is a sound-design workstation built around designing the impulse response itself. Put it on a playing instrument or audio track, build a response from two IRs, recordings or found sounds, and Anvil's own stereo convolution engine processes the track through that response while you design it. Bake is optional export.

Is it a convolution reverb?

It includes its own stereo convolution engine and processes your track through the response you are designing. The difference is that Anvil is centered on making and shaping that response instead of only choosing a finished reverb preset.

Do I need another IR loader?

ANVIL IS THE EFFECT. You do not need another convolution plugin to use the response you are designing. Anvil already processes the playing track through it. Bake only when you want the response itself as a reusable WAV for another compatible convolution tool or another Anvil design pass.

What is the difference between a preset and Bake?

A preset saves the complete Anvil setup so you can return to the tweaking session or keep a favorite configuration. Use the preset Save / Load controls in OPTIONS. Bake exports the designed response itself as a WAV.

Do A and B only crossfade?

No. The full version contains 21 relationships across Core Morph, Residual / Decompose and Acoustic Interaction families. They include direct and spectral blends, stereo structures, shared/unique material, residual relationships and more experimental transformations.

What are Draw, Path, Glue and Omni Path?

Draw paints how the selected relationship changes over the IR. Path adds forward/backward source-time travel. Glue Path appends separate painted pieces and owns its duration independently of Lerp Start/Time. Omni Path keeps X as source-time and Y as relationship depth, while both horizontal and vertical route travel create output time.

What does A→B Lerp do?

It creates one prepared IR whose relationship changes internally over its duration. The selected Morph mode and curve/path define the construction, and the result can be baked into one WAV instead of requiring live automation.

Can I use only what B has that A does not?

Unique B is designed around that exact relationship: progressively remove the component estimated to be shared with A and keep what remains characteristic of B. Matched Residual, Spectral Carve and Transfer provide related alternatives depending on what you are trying to isolate.

Can I load normal recordings and found sounds?

Yes. Compatible recordings can become convolution material. Short fragments often behave like complex resonant or tonal fingerprints; longer material can introduce more obvious timing and decay behavior.

What gets baked?

The prepared IR path is baked: A/B preparation, the current Morph/Lerp construction, Edit, IR-input preparation, EQ, Width, Normalize and Limiter as documented. Playback-only controls such as Dry/Wet and final track Output are not a substitute for preparing the IR itself.

Can I use baked WAVs elsewhere?

Yes. The full version writes standard WAV impulse responses for compatible convolution software and IR loaders.

What does the demo include?

The demo lets you test the Windows VST3 with the included library, Time Morph and a reduced Color workflow. It adds subtle periodic demo noise and does not unlock the complete Morph library, A→B Lerp or WAV baking.

What platforms are supported?

Windows 10/11, 64-bit VST3 is the primary supported commercial release. A macOS AU/VST3 testing build is also available from the Downloads page. The macOS testing build uses the same demo/full-license system and unlocks the complete plug-in functionality with a valid Impulse Anvil license, but it is not distributed with an Apple Developer ID signature and is not notarized by Apple, so macOS may require manual approval.

Is the macOS testing build feature-limited?

No. Testing-build status describes the current macOS distribution/support path, not a reduced feature tier. The build starts in the normal Impulse Anvil demo state; the same purchased license unlocks the complete functionality. The important difference is distribution trust: the macOS testing build is not Apple Developer ID signed and has not been notarized by Apple.

Impulse Anvil

Morph IRs.
Bake WAVs.

Start with the free demo. Load your own sounds, explore the included library and hear what Impulse Anvil does inside your own music.

Download free demoGet Impulse Anvil · €49