








Table Of Content
Introduction
Description
This plug-in is the stereo version of the original analog-style Phaser effect. With this one it's now possible to obtain a stereo phasing effect with a single parameter that controls it.
From mono to wide stereo phasing, the transition is smooth and continuous: it's fully automatable and easy to control. The effect has been modeled after the same kind of vintage circuits as the original Phaser plugin which offered a stereo capability.
Like the mono version, this plug-in supports MIDI control and Blue Cat's Skinning Language to give you total control over the sound.
Features
- Multi-stage analog-style stereo phaser effect.
- Up to 32 phasing stages.
- Very simple stereo width control.
- No latency.
Blue Cat Audio Standards:
- Available as: Mac-AU, Mac-RTAS, Mac-VST, Win-DX, Win-RTAS, Win-VST, Win x64-DX, Win x64-VST.
- Native DSP code for optimal performance.
- Full MIDI control and automation support with silent, zipper-free parameters update, advanced response control and MIDI Learn.
- No CPU load on idle: when the plug-in is fed with silence, the processing smoothly shuts down, to optimize the CPU usage of your Digital Audio Workstation.
- Skinnable and customizable user interface with transparency management.
- Smooth Bypass: activate/deactivate the plug-in with absolutely no noise.
- Undo/Redo.
- Import/Export presets in a host independent format.
- Any sample rate supported.
System Requirements
Windows
- An SSE2-enabled processor (Pentium 4 or later).
- Microsoft Windows XP, Vista or Windows 7.
- Any DirectX / VST / RTAS compatible host software (32 or 64 bit).
Mac OS X
- An Intel or PowerPC processor.
- Mac OS X Leopard (10.5), Snow Leopard (10.6) or Lion (10.7).
- Any VST / Audio Unit (32/64-bit) / RTAS compatible application.
For more information about supported platforms, see our FAQ.
Installation
Blue Cat Audio plug-ins cannot be run standalone, they require a host application (see the System Requirements chapter for more information). Depending on which host application you use, you might need to install the plug-ins in different locations.
Windows
Install
All versions of the plug-in provide an installation program. Follow the steps of the wizard to install the plug-in on your machine. During the installation you will be asked where you want the plug-in(s) to be installed. For the VST version you should install the plug-in inside the VST plug-ins folder used by your host application(s). The default path set in the installer should work for most applications, but you should check your host software documentation to know where it looks for VST plug-ins.
Some applications will not automatically rescan the new plug-ins, so you might have to force a refresh of the plug-ins list.
Upgrade
When a new version of the plug-in is released, just launch the new installer: it will update the current installation.
Uninstall
To uninstall the plug-in, simply launch the "Uninstall" program that is available in the start menu or in the configuration panel. It will take care of removing all files from your computer.
Mac
Install
On Mac the plug-ins are available as drive images. After download, double click on the file to open it. You can then drag and drop the plug-in file(s) to the shortcut that is provided within the image. It will install the plug-in(s) for all users on the machine.
In case you do not have admin rights on your Mac or if you want to install the plug-in(s) to another directory, just copy the files to the appropriate location. If required, more information is available in the README.txt file that is included in the package.
Upgrade
When a new version of the plug-in is released, open the new image and copy the files over the previous ones. The new version will replace the older one.
Uninstall
To uninstall the plug-in, simply remove the plug-in components from the folder where you have copied them during install (move them to the trash).
Using Blue Cat's Stereo Phaser
The User Interface
Note: The main toolbar, menus and basic features available with all our plug-ins are detailed in the Blue Cat Audio Plug-ins Basics section.
This plugin offers very simple controls. It is delivered with several skins to let you choose the one that best suits your tastes. All skins offer similar layouts. Below is the default skin.

Each slider lets you control the value for the parameters described in the "Parameters" section.
The various elements of the user interface (knobs, sliders, buttons...) are simple and intuitive to operate, but more information about how to interact with them is available in the "Plug-ins Basics" chapter of this manual.
Operation
The various presets provide examples of how the parameters influence the sound of the phaser.
The particularity of the plugin is that you can control how it affects the stereo perception of the sound. All parameters are described in details in the "parameters" section.
Blue Cat Audio Plug-ins Basics
This chapter describes the basic features that are common to all our plug-ins. If you are already familiar with our products, you can skip this part.
User Interface Basics
About Skins
Like all Blue Cat Audio plug-ins, Blue Cat's Stereo Phaser uses a skinnable user interface. It means that the appearance and behavior of the user interface can be entirely customized.
Especially with third party skins, the experience may be quite different from the one offered by the default skins that we provide. However, our plug-ins and our skinning engine have several standard features that will be available whatever your favorite skin. This is what is described in this chapter.
More information about custom skins can be found in the skins section.
Main Toolbar and Menu
Menu
If you right click on the background of the plug-in, the following pop-up menu appears:

The description of the commands associated to each menu item are available below.
Toolbar
In some skins, an optional toolbar gives you access to the some of the functionalities of the main menu.
| Icon | Name | Function |
|---|---|---|
|
|
Menu | Open the main menu |
|
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Undo | Undo |
|
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Redo | Redo |
|
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Load | Load Preset |
|
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Save | Save Preset |
|
|
Manual | User Manual |
|
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About | About |
|
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Website | Opens our website |
Commands
The Commands available from the main menu or the toolbar are:
- Set Preset Skin: change the skin for the current preset.
- Use Global Skin: use the skin defined in the global settings for the current preset. This item is enabled only if a skin has been defined for the current preset.
- Undo/Redo: undo or redo the latest modifications. This includes all changes made to the current preset settings.
- Load Preset: load preset from file.
- Save Preset: save current preset to file.
- Presets Settings: open the presets settings window. It enables you to change the skin and MIDI settings for the current preset.
- Global Settings: open the global settings window. It enables you to change the skin and MIDI settings that are used by default in all instances of the plug-in.
- User Manual: open this user manual.
- Check Updates: check the updates for this software on our website.
- Get More Skins: get more skins for this software.
- About: displays the “about” dialog box.
MIDI control
Blue Cat's Stereo Phaser can also be remotely controlled via MIDI using MIDI CC ("Control Change") messages if your host application supports it. It is possible to customize the channel, control numbers and range used for each parameter in the MIDI settings panel available from the main menu (see the Plug-in Settings chapter for more details).
Controls
Examples
Here are a few examples of typical controls you will encounter in the user interface of our plug-ins:
| slider | slider | knob | button | Text control |
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Interacting with Controls
You can interact with the controls of the plug-in interface either with the mouse or the keyboard.
Setting the keyboard focus on a control (so that it responds to key strokes) may be automatic (when you pass the mouse over it it gets focus) or manual (you have to click on the control to set the focus on it). Note that all host applications behave differently regarding keyboard handling. In some applications you may not be able to use all keys described later in this manual to interact with our plug-ins. It is usually made obvious to you to know the active surfaces of the skin (the places where you can click with the mouse): the mouse cursor usually changes when you can do something on a control. In the default skins delivered with the plug-in, the cursor changes to a small hand or an arrow to tell you when your mouse is over an active control.
Mouse
Various mouse movements will let you interact with the controls:
| Mouse Interaction | Action |
|---|---|
| Left Click | Acquire focus and start dragging or push (button) |
| Left Click + Alt Key | Set the value to default |
| Left Double Click |
Acquire focus and launch the “fine
tuning” edit box (except button):
![]() |
| Right Click | Set the value to default |
| Mouse Wheel | Increment or decrement the position (focus required) |
| Mouse Drag | Change the control position depending on mouse movement (except button) |
Keyboard
All control widgets support the following keys (note that some of them are caught by the host and thus never forwarded to the control. For example in Steinberg Cubase SX you cannot use the arrow keys to control the plug-in):
Keys Common to All Controls
| Key | Action |
|---|---|
| Up Arrow | Small increment of the position (up or right) |
| Down Arrow | Small increment of the position (down or left) |
| Left Arrow | Same as Down Arrow |
| Right Arrow | Same as Up Arrow |
| Page Up | Large increment of the position (up or right) |
| Page Down | Large decrement of the position (down or left) |
| + | Small increment of the value of the control |
| - | Small decrement of the value of the control |
| d | Set to default value (same as mouse right click) |
| e |
Opens the 'fine tuning' window to precisely
set the parameter:
![]() |
| SHIFT | When the key is down, the fine tuning mode is on, and you can modify the value with better precision when moving the mouse, the mouse wheel or using the keyboard. Just release the key to get back to the normal mode. |
Keys Specific to Buttons
| Key | Action |
|---|---|
| Enter | Pushes the button |
More
Check our online tutorial for more screenshots and more examples of our plug-ins user interfaces.
Blue Cat's Stereo Phaser Parameters
All parameters described below can be automated and controlled via MIDI if your host application supports it. You can precisely define this behavior in the settings panels described later in this manual.
|
Param id |
Name |
Unit |
Description |
|---|---|---|---|
|
dsp.input0 |
Bypass |
|
Bypass the effect. |
|
dsp.input1 |
Gain |
dB |
Input gain. |
|
dsp.input2 |
Dry |
% |
Amount of dry input signal. |
|
dsp.input3 |
Wet |
% |
Amount of directly phased signal. |
|
dsp.input4 |
Feedback |
% |
Amount of feedback. If you set this value to +/-100% the signal might increase until it clicks. A negative value means phase inversion for the feedback loop. |
|
dsp.input5 |
Stages |
|
Number of phasing stages. |
|
dsp.input6 |
Depth |
% |
Depth of the phasing effect. |
|
dsp.input7 |
Rate |
Hz |
Rate of the LFO. |
|
dsp.input8 |
Shape |
|
Selects one of the two available shapes for the LFO: sine (0) or triangle (1) waveform. |
|
dsp.input9 |
Stereo |
% |
Amount of 'stereoness' of the effect. When set to zero, the resulting effect is mono (same effect for left and right channels) |
Plug-in Settings
In addition to the controls offered in the main user interface, Blue Cat's Stereo Phaser has various settings that let you fine tune the behavior of the plug-in. You can choose to change these settings either for the current preset or globally for all instances of the plug-in.
The Global Settings Window
The settings available in this window apply to all instances of the plug-in, for all presets, if not overriden in the presets settings. Consider these settings as “default” settings.
Global Skin
You can change the default skin for all instances of the plug-in: write the skin file path in the text edit box or click on the button to open a file chooser dialog. If you have several instances of the plug-in opened in your session, you will have to re-open the user interfaces of these plug-ins to see the skin change.

Global MIDI Input Settings
For each parameter you can define a default MIDI channel and CC number. You can then control the plug-in with an external MIDI controller or one of our plug-ins that generate MIDI messages.
The following settings are available for each plug-in parameter:
- Channel: MIDI Channel for the parameter control. If set to 0, the plug-ins will accept Control Change Messages from all MIDI Channels (MIDI Omni mode).
- CC: Control Change Number.
- Learn: click on this button to activate the MIDI learn functionality. When it is activated, you can move your MIDI controller, and the plug-in will automatically set the MIDI Channel and CC Number.
- Enable MIDI: enable/disable the MIDI control of the parameter.
- Response: response curve of the MIDI control: from very fast to slow control.
- Min: minimal value of the parameter when MIDI controlled.
- Max: Maximum value of the parameter when MIDI controlled.

Note: if the Min value is higher than the Max value, the response curve will be reversed: increasing the control value will decrease the parameter value.
Note: if you double click on the parameter text control boxes for the max and min values, a “fine tuning” edit box will appear and let you change the min and max values with more precision:

The Current Preset Settings Window
In this window you can change the settings for the current preset of the current instance of the plug-in only.
Preset Skin
You can choose to use the global skin setting or to change the skin for the current preset. This way you can have different skins for different instances of the plug-in in the same session in order to differentiate them.

Preset MIDI Input Settings
Use the global settings or override them for the current preset. The parameters are the same as for the global input settings.

About Skins
Blue Cat's Stereo Phaser integrates Blue Cat's skinning engine that allows you to customize the user interface. You can download new skins for your plug-in at the following address:
If you don't find a skin that fits your need or if you want a really custom one, you can choose to create your own skin.
Changing the Skin
You have two ways to change the skin of your plug-in: you can change the default (or 'global') skin in the global settings, or change the skin for the current preset only (either in the preset settings page or from the main menu). The global skin applies to all plug-in instances, whereas the current preset skin only applies to the current preset of the current plug-in instance.
See the main menu for more information about how to access these options.
On some hosts the plug-in window won't resize automatically when you choose a skin with a different size. In this case, just close the window and re-open it: it will be displayed with the right size.
Create a Custom Skin
You can create custom skins for your plug-in in order to adapt it to your exact needs. You can change its look and feel and make it completely integrated in your virtual studio!
Just read the Blue Cat's Skinning Language manual and download the samples for the tutorial on http://www.bluecataudio.com/Skins. You can get ready to create your own skins in a few minutes.
You can then share your skins on our website.
FAQ
Plug-ins Formats
Here is a list of host software and the version we recommend you to use. Many other applications are supported, check your application user manual to choose the best version (AU stands for "Audio Unit" and DX for "DirectX"):
| Host Application | Plug-in Version |
|---|---|
| Cakewalk Products (Sonar, Project5...) | DX |
| Sony Products (Vegas, ACID, Soundforge) | DX for old versions, VST for new |
| Steinberg Products (Cubase, Nuendo, Wavelab) | VST (Mac or PC) |
| Ableton Live | VST (Mac or PC) |
| Adobe Audition | any |
| EnergyXT | VST |
| Magix Samplitude | VST |
| Avid (Digidesign) Pro Tools | RTAS |
| Apple applications (Logic Pro, Logic Express, Garage Band...) | AU |
| Cockos Reaper | VST (Mac or PC) |
| ... |
Installation
Most software you can purchase on this website is plug-ins for host applications. It means you need another application to use it. See the "Plug-ins Formats" section in this FAQ for more information.
First check that you application supports DirectX, Audio Unit or VST plug-ins.
If you are using the DirectX version, check that your host application supports DXi plug-ins (MIDI enabled DirectX plug-ins). If it does not, it may remove it from the DirectX plug-ins list (some applications such as Sony Vegas 5 and Cool Edit Pro are known to do this). In this case, use our DXi Manager free utility and disable the MIDI capabilities of the plug-in. You may need to reinstall the software again before it shows up into your host application. For more information about this topic please read our DXi in Sony Vegas tutorial (it is applicable to other applications than Sony Vegas).
If you are using the Direct X version and your host application supports DXi, check that the plug-in does not appear in the 'virtual synth' or 'synthesizers' category. If you wish not to use the MIDI capabilities of the plug-in and use it as a regular Direct X plug-in, you can download the freeware DXi Manager and disable the MIDI capabilities of the plug-in.
You are probably running a 32-bit application. If that's the case, you need to install the 32-bit version of the plug-in: the choice for 32 or 64-bit is not determined by the operating system (64-bit windows can run both 32 and 64-bit applications), but by the host application that you are using.
Our plug-ins require several additional files for default settings, skins and miscellaneous data. We provide an installer for our customers' convenience. Our installers do not modify the system settings or the Windows registry, except for the DirectX versions registration. Our installers won't harm your system.
Software Version
Upgrade
Automation
More...
This manual only covers the basics of Blue Cat's Stereo Phaser. Our website offers many additional resources for your Blue Cat's Stereo Phaser plug-in and is constantly updated, so keep an eye on it! You will find below a few examples of available resources.
Extra Skins
We encourage our customers to propose their own skins for our products and we often propose alternative skins to let you choose the one that best suits your needs. You can check Blue Cat's Stereo Phaser skins page to get the latest skins.There were no extra skins for Blue Cat's Stereo Phaser when initially released. Please check the skins page to see if new skins are now available.
Tutorials
Many Tutorials are available on our website. They cover a wide range of topics and host applications. You will find below a list of tutorials that are related to the Blue Cat's Stereo Phaser plug-in. An updated list is also available online.
Updates
As you can see in the history log below, we care about constantly updating our products in order to give you the latest technology available. Please visit our website often to check if Blue Cat's Stereo Phaser has been updated, or subscribe to our Newsletter to be informed of the latest news about our products.
Versions History
V2.51 (2011/02/10) |
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V2.5 (2010/06/02) |
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V2.41 (2009/05/05) |
| Mac VST update: fixed incompatibility issues with Cubase 5 on Mac. |
V2.4 (2009/04/01) |
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V2.3 (2008/08/25) |
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V2.2 (2006/11/29) |
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V2.1 (2006/09/27) |
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V2.0 (2006/09/20) |
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V1.4 (2005/02/01) |
|
V1.0 (2005/01/10) |
| First version. |
See you soon on www.bluecataudio.com!
