Click anywhere on the interface to jump to a control’s definition.

With intuitive rate controls, flexible shape parameters, and a rich palette of tremolo types, Trem Control learned from the classics, but makes possible — for the first time ever — radically new tremolo effects for this century. Paired with a crunchy tube summing stage, Trem Control can bring the warmth and vibe along with its wobble, chop, and shake.


Primary Controls

Rate Controls

Rate Mode

Determines how the tremolo rate is set.

BPMThe tremolo rate is based on the Tempo and Note selection.
HzThe tremolo rate is set in hertz with the Rate control.


Note sets the tremolo rate using musical durations, ranging from a whole note: 1, to a thirty-second note: 1/32.

The Note control supports clicking, dragging, and the arrow keys.

Use Shift + or to “lock” the current row when changing notes.

Looking for something slower than a whole note, or faster than a thirty-second note? Use the Rate Multiplier to get at those outliers.

Note, Tempo, & Tempo Sync are active when Rate Mode is set to BPM.

  • Min 1
  • Max 1/32
  • Default 1/4


Trem Control’s tempo in beats per minute (BPM).

The tempo can be set via tap tempo. Use the f or j keys when the control is highlighted to tap in your desired tempo.

This parameter is labeled as BPM in the plugin’s user interface.

  • Min 30BPM
  • Max 300BPM
  • Default 120BPM

Tempo Sync

Determines how the Tempo is set: either manually or synced from the host/DAW.


Controls the absolute tremolo rate in hertz (Hz).

Rate is active when Rate Mode is set to Hz.

  • Min 0Hz
  • Max 20Hz
  • Default 4Hz

Rate Multiplier

Increases or decreases the tremolo rate by a multiple.

Example: 4Hz2x = 8Hz

The Rate Multiplier is active for both BPM & Hz Rate Mode’s.



Controls how deep the tremolo modulates (i.e. the amount of tremolo).

At 100%, the tremolo modulates from fully “On” (zero attenuation) to fully “Off” (full attenuation).

  • Min 0%
  • Max 100%
  • Default 100%


Continuously varies the tremolo wave shape from triangle to sine to square .

Both triangle and sine types produce fairly smooth-sounding tremolo. Sine sounds a bit deeper; triangle sounds a bit sharper.

Square wave tremolo produces hard chopping and has the sharpest sound of the three wave types.

  • Min 0%
  • Max 100%
  • Default 50%


Controls the symmetry of the tremolo modulation’s rise and fall.

  • At 50%, the tremolo rise and fall are symmetrical and take the same amount of time.
  • At 0%, the tremolo rise is much faster than its fall — producing a sharper attack.
  • At 100%, the tremolo rise is much slower than its fall — producing a softer attack.
  • Min 0%
  • Max 100%
  • Default 50%


Sort of like a pulse-width control, the Bias causes the tremolo shape to “bend” toward either amplitude extreme.

  • At 0%, the tremolo shape is biased toward fully “Off” (full attenuation).
  • At 100%, the tremolo shape is biased toward fully “On” (zero attenuation).
  • Min 0%
  • Max 100%
  • Default 50%


Tube Color

Controls the amount of tube coloration.

  • 0% is totally clean: no harmonic distortion, tonal coloration, or noise.
  • 200% is the exact opposite.

Tube Color includes a meter embedded in the slider. This meter shows the THD (total harmonic distortion) added to the signal, up to 13% THD.

  • Min 0%
  • Max 200%
  • Default 100%

Trem Type

Trem Control offers a couple different tremolo types — each with their own unique sounds and applications.

NormalAmplitude modulation: the tremolo you think of when you think of tremolo.
HarmonicFeatured on many classic Fender amps from the mid-century, harmonic tremolo divides the highs and lows, modulating them out of phase to create a gorgeous, intoxicating wobble.
Deep HarmonicA more extreme version of the classic harmonic tremolo — can sound almost like a phasor, or someone shaking a metal sheet.
BassModulates the lows only.
TrebleModulates the highs only — great for more subtle tremolo effects.
AirModulates the highest “air band” frequencies only.
Mid/SideModulates the mid and side out-of-phase (only available in stereo).
Mid OnlyModulates the mid only (only available in stereo).
Side OnlyModulates the side only (only available in stereo).

Advanced Controls

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

To access Trem Control’s advanced controls, click the ••• icon in the sidebar.

Advanced Shape

Stereo Phase

The Stereo Phase is just like Phase Offset, except that it only affects one of the stereo channels.

  • At , the left/right tremolo modulations are exactly the same.
  • At 180º, they are completely out of phase. This produces a much wider-sounding tremolo effect.
  • Min 0°
  • Max 360°
  • Default 0°

Phase Offset

The Phase Offset makes it possible to offset where the modulation peak occurs in time (generally most useful when Trem Control is synced to the beat).

At , the the tremolo’s loudest part is aligned to the downbeat. Offsetting this in time makes it possible create offbeat pulses and other interesting rhythmic effects.

  • Min 0°
  • Max 360°
  • Default 0°

Advanced Rate


The swing control makes it possible push and pull the tremolo’s rhythm, creating unequal pulses in succession.

  • A Swing of 0% produces no swing at all — each tremolo pulse is the same length.
  • Swing values above 0% cause every second pulse to be shorter in time. At 100%, the second pulse is infinitely short, causing the first pulse to be twice as long.
  • Swing values below 0% cause every second pulse to be longer in time. At 100%, the first pulse is infinitely short, causing the second pulse to be twice as long.
  • 25% gets you classic jazz swing, as notated by ß.Swing; -25% will get you the inverse, something we call “reverse” or “negative” swing, ß.NegativeSwing.
  • Min -100%
  • Max 100%
  • Default 0%


Tube Noise Gain

Controls the gain of the tube stage’s noise.

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

The tube stage only produces noise when Tube Color is greater than 0%.

  • Min -96dB
  • Max 24dB
  • Default 0dB

Volume Comp

When On, Trem Control’s volume compensation ensures approximately constant RMS level, regardless of the tremolo Depth.

  • Min Off
  • Max On


Input Trim

Enables input gain trimming before the tube summing stage.

This can be used to overdrive the tube stage, producing some gnarly tube distortion and crunch.

  • Min -24dB
  • Max 12dB
  • Default 0dB

Output Trim

Enables output gain trimming after the tube summing stage.

  • Min -24dB
  • Max 12dB
  • Default 0dB

HQ Mode

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, Trem Control’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.


Supported Channel Configurations

Input Channel # Output Channel #
1 1
1 2
2 2


  • Chris Conover
  • Tyler Duncan
  • Don Gunn
  • Annlie Huang
  • TaeHo Park
  • Daniel Saban
  • Garreth Spinn
  • Jack Stratton
  • 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.

Our meters can be manually enabled or disabled via the “Enable Metering” User Preference.

Keyboard Shortcuts

ActionKeyboard Shortcut
Enter New Parameter ValueOnce you’re tapped or double-tapped a control, type in a value, then hit Enter, Return, or Tab
Increment Parameter Value or arrow keys
Decrement Parameter Value or arrow keys
Jump to Next ParameterTab
Jump to Previous ParameterShift + Tab or ` (backtick)
Escape Parameter Focus / Close any Open DrawersEsc
Toggle A/BA (N.B. For this to work, you must have a control selected.)
Shift A to B / Shift B to AShift + A — this “shifts” the current settings to the opposite A/B state; i.e. if you’re on the A state, hitting Shift+A will copy those settings to the B state. (N.B. For this to work, you must have a control selected.)

Right-Click Actions

Reset Control to DefaultRight-Click & select “Reset [control] to Default”
Read about Control in ManualRight-Click & select “Read about [control]”
Lock a control when Switching PresetsRight-Click & select “Lock [control] When Switching Presets”
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 plugin settings to defaultRight-Click & select “Reset all settings to default”
Go to the plugin’s product pageRight-Click & select “Goodhertz [plugin name]”

Right-Click Preferences

Always Open Advanced PaneBy default, this is false — i.e. when the plugins open, they do not show you the advanced controls available by hitting the ••• button in the sidebar. If you’d like to always see the advanced controls, enable this preference.
Enable MeteringBy default, this is true — i.e. in normal operation, all audio meters and visualizations available in Goodhertz plugins are enabled and running. If you’d like to turn them off and disable all metering and visualization, deselect this option. And to turn them back on, simply reselect it. N.B. If you’re struggling to use a large number of Goodhertz plugins on an older processor with an integrated GPU, sometimes disabling metering can help.
Enable Scroll InputBy default, all Goodhertz sliders can be scrolled in addition to dragged. If you find this behavior unnecessary, deselect this option and no scrolling events will be used to control Goodhertz sliders.
Window SizeEnlarge or shrink the Goodhertz plugin window by selecting an option here. This will save your preference for all instances of this plugin.

Mouse Modifiers

ActionCombination (Mac)Combination (Windows)
Reset Parameter to Default ValueOption + ClickAlt + Click
Move Control with Coarse PrecisionShift + DragShift + Drag
Move Control with Fine PrecisionCommand + DragCtrl + Drag
Move Control with Normal PrecisionDragDrag


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 ≥ 10.9

Audio Unit 64-Bit, VST 64-Bit, VST3 64-Bit, or AAX 64-Bit host

Windows ≥ 7

VST 64-Bit, VST3 64-Bit, or AAX 64-Bit host

Contact Support

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.