Manual for the operation of Vulf Compressor
by Goodhertz, Inc.


(dictated via notes app)

It is with great pleasure that I dictate this to you via the notes app on my cellular device please enjoy this plug-in and use it as much is your CPU allows please use it on the master bus try it on individual instruments it’s great on drum brakes and electric bass to add extreme attack please do not treat this like a classic plug-in where they tell you to not use as much bass it save presets save channel strips let this be a part of your mixing thank you.




Input Gain

-24dB / 12dB
default: 0dB

Varies the input gain, pre-compression.

Input Gain includes a level meter embedded in the slider. This meter shows the peak level of the input signal before ​Vulf Compressor’s processing.

If the signal peak exceeds or equals 0.0dB the meter color turns red, indicating that clipping could occur. ​Vulf Compressor will never clip internally, due to its double-precision floating-point processing, but the signal might be clipped at a later stage (by the host/DAW or DAC).


Compression Amount

0% / 100%
default: 50%

Controls the overall compression amount.

  • It’s not possible to entirely shut off the compression. Even at 0%, ​Vulf Compressor still imparts a bit of its signature compressor sound.
  • If you do want absolutely no compression, use the ​Master Mix.


Wow/Flutter Amount

0% / 100%
default: 15%

Controls the depth of the vinyl wow & flutter.

Wow/Flutter Mix, ​Wow/Flutter Speed, ​Wow/Flutter Phase are all controllable in ​Advanced Wow Flutter.


Lo-Fi Amount

0% / 100%
default: 50%

Controls overall fidelity. Higher ​Lo-Fi Amount produces more total harmonic distortion, decreased high frequency resolution, and more noise.

More precise control for the distortion (Lo-Fi Crunch), noise (Lo-Fi Noise Gain), & overall lo-fi flavor (Lo-Fi Type) are available in ​Advanced Noise.


Output Gain

-24dB / 12dB
default: 0dB

Varies the output gain, post-compression.

Output Gain includes a level meter embedded in the slider. This meter shows the peak level of the output signal after ​Vulf Compressor’s processing.

If the signal peak exceeds or equals 0.0dB the meter color turns red, indicating that clipping could occur. ​Vulf Compressor will never clip internally, due to its double-precision floating-point processing, but the signal might be clipped at a later stage (by the host/DAW or DAC).

Master Mix

Master Mix

0% / 100%
default: 100%

Controls the overall impact of ​Vulf Compressor. At 0%, the ​Compression, ​Wow/Flutter, & ​LoFi processing are fully bypassed.

This mix control won’t introduce comb filtering or other unexpected blending articats like a standard parallel mix. Instead, it’s designed to gracefully go from bypassed to 100%.

The ​Input Gain & ​Output Gain are unaffected by the ​Master Mix setting.

Advanced Compression

The Advanced section offers more precise control and fine adjustment options.

To access ​Vulf Compressor’s advanced controls, click the ⋅⋅⋅ icon in the sidebar.

Comp Attack Time Constant (Attack τ)

0‍ / 8‍
default: 1‍

Modifies the speed of ​Vulf Compressor’s attack.

This control is unitless (i.e. not specified in seconds or milliseconds) because ​Vulf Compressor does not have a traditional fixed attack time (it involves a complex interaction of signal dynamics and feedback). Smaller ​Comp Attack Time Constant’s will clamp down quickly, damping transients. Larger ​Comp Attack Time Constant’s cause ​Vulf Compressor to react more slowly, emphasizing the attack and punch of the incoming signal.

Comp Release Time Constant (Release τ)

0‍ / 8‍
default: 1‍

Modifies the speed of ​Vulf Compressor’s release.

Like ​Comp Attack Time Constant, this control is unitless (i.e. not specified in seconds or milliseconds). Smaller ​Comp Release Time Constant’s cause ​Vulf Compressor to release more quickly, often sounding louder and causing more audible pumping or even distortion. Larger ​Comp Release Time Constant’s cause ​Vulf Compressor to release more slowly and smoothly.


default: On

Turns the ​Vulf Compressor stereo link On or Off.

When ​Comp Stereo Link is On, the same amount of compression is applied to each channel. This preserves the existing stereo image.

When ​Comp Stereo Link is Off, each channel is compressed separately. This can affect the stereo image when loud sound sources are panned far left or right but can also result in a louder, more powerful overall sound.

Advanced Wow Flutter

Wow/Flutter Mix (Mix)

0% / 100%
default: 100%

Overall wow & flutter mix.

100% is all wow & flutter, no dry signal.
0% is all dry, no wow & flutter.

Intermediate ​Wow/Flutter Mix settings will produce some nice flanging effects, which can be just the right thing to spice up a vocal or melodic instrument.

Wow/Flutter Speed (RPM)


default: 33.3

Speed of the wow & flutter. The standard LP record is 33⅓ RPM.

Wow/Flutter Phase (Phase)

0° / 360°

Controls the stereo phase of the wow & flutter. produces a monophonic wow & flutter, whereas 180° produces opposite modulation in the left and right channels.

For some subtle stereo widening, try a ​Wow/Flutter Phase of 180° with a ​Wow/Flutter Amount around 10%.

Advanced Noise

Lo-Fi Noise Gain (Noise)

-96dB / 12dB
default: 0dB

Controls the amount of lo-fi noise.

You can quickly turn toggle the lo-fi noise On or Off by clicking the small sidebar “noise” icon.

Lo-Fi Type (Type)

1990's Digital
1980's Digital

default: Analog

Selects the flavor of the lo-fi degradation.

« Analog »Harmonically rich with just the right amount of dirt.
« 1990’s Digital »Bad 1990’s digital converter with moderate aliasing.
« 1980’s Digital »Harsh 1980’s digital converter with some nasty aliasing.

Lo-Fi Crunch (Crunch)

0% / 100%
default: 0%

Amount of total harmonic distortion from moderate: ​0.0%, to crunchy: ​100.0%.


HQ Mode


default: Off

​​HQ Mode is our no-holds-barred processing mode where super high quality audio is given priority over CPU usage. When ​​HQ Mode is turned ON, ​​Vulf Compressor’s processing is internally oversampled, providing better high frequency resolution and reduced aliasing.

We recommend using ​​HQ Mode when you need the highest possible quality and don’t mind 2-4x higher CPU usage (depending on the sample rate). An important lead instrument/vocal or master bus is a great place for ​​HQ Mode.

HQ Mode will require more CPU resources and result in a slightly higher processing delay (latency). To ensure proper delay compensation in your host/DAW, automating ​​HQ Mode is not recommended.

Digital Ref Level

-36dB / 0dB
default: -18dB

Digital Ref Level defines an approximate reference level as seen by the ​Vulf Compressor input. This control greatly affects how the signal hits the compressor and lo-fi section, and it should absolutely be used for creative effect. For louder sources, ref levels closer to ​0.0dB may be most appropriate.

For the snappiest, attack-heavy compression, try ​Digital Ref Level at ​0.0dB. For crushed & saturated compression, try ​Digital Ref Level at ​-36.0dB.


Supported Channel Configs

1->1 | 1->2 | 2->2


The presets are a great way to get to know each plugin. The preset drawer can be accessed at the bottom of each plugin by clicking the current preset name.


  • Chris Conover
  • Stephen Ellison
  • Annlie Huang
  • Otis Jackson, Jr.
  • Mushy Krongold
  • Bernard Purdie
  • Roger Robindore
  • Jack Stratton
  • James Dewitt Yancey
  • Diana Zheng

§About Goodhertz Plugins

User Interface

Goodhertz plugins are made to be workhorse tools that sound amazing. We've put a lot of thought and care into the audio quality and plugin usability, and for that reason, we've opted for simple and direct controls & interfaces that don't rely on photorealistic knobs or ornamental screw heads to communicate their meaning.

We’ve also decided to only include meters and graphs when we feel they will directly lead to a better sonic result. Meters/graphs can consume significant CPU resources, and we firmly believe that if it sounds good, it is good.

Keyboard Shortcuts

ActionKeyboard Shortcut
Enter New Parameter ValueOne you’ve tapped or double-tapped a control, type in a value, then hit Enter, Return,  orTab
Increment Parameter Valueor arrow keys
Decrement Parameter Valuesor arrow keys
Jump to Next ParameterTab
Jump to Previous ParameterShift + Tabor` (backtick)
Escape Parameter Focus / Close any Open DrawersEsc

Mouse Modifiers

Reset Parameter to Default ValueOption + Click
Move Control with Normal PrecisionDrag
Move Control with Coarse PrecisionShift + Drag
Move Control with Fine PrecisionCommand + Drag
Reset Control to DefaultRight-Click & select “Reset [control] to Default”
Read about Control in ManualRight-Click & select “Read about [control]”
Copy all current plugin settingsRight-Click & select “Copy all settings as URL to Clipboard”
Paste all plugin settingsRight-Click & select “Paste all settings from Clipboard”
Reset all plugins settings to defaultRight-Click & select “Reset all settings to default”
Go to the plugin’s product pageRight-Click & select “Goodhertz [plugin name]”


Unintentional digital clicks and pops are the worst. They happen for lots of reasons and often end up wasting time with needless revisions or mastering surgery. When they go unnoticed, they can make their way onto commercial albums and releases.

Plugin automation is a common cause of clicks and pops. Sweeping an EQ band, changing a delay setting, and even automating a plugin bypass can cause digital artifacts if poorly handled.

This is not true for Goodhertz plugins. Any parameter in a Goodhertz plugin, even on/off switches, can be automated freely and smoothly without clicks, pops, or zipper noises (unless otherwise noted). You can push them, pull them, LFO them — whatever you do, they’ll handle it gracefully.

Since our Master On/Off controls won’t create artifacts, we recommend that you use them rather than your DAW-supplied plugin bypass if you want to disable plugin processing.

Plugin Settings

Goodhertz plugin settings can be copied and pasted as text urls, which look like this:

To copy and paste, right click anywhere on the plugin interface and select either the copy or the paste option.

E.g. If you paste “” into Vulf Compressor it will recall the settings associated with that url. This way you can easily send an exact plugin setting to someone — in an email or even a tweet — without any guesswork or screenshots.

System Requirements

  • Mac OS X ≥ 10.7
  • Audio Unit 64-Bit or AAX 64-Bit host


To send plugin feedback, please e-mail us at:

If you have a quick question, send us a tweet @Goodhertz. We’re often able to respond faster to tweets than emails.

If you’re having trouble, experiencing a technical issue, or you think you’ve found a bug, please email:

Find all our contact info & bug-reporting protocol on the contact page.


Code for this plugin was written by:

  • Devin Kerr
  • Rob Stenson
  • Emma Azelborn