--- title: "Omnia.9 Processing Setup" slug: "omnia9-processing-setup" updated: 2024-11-11T07:21:29Z published: 2024-11-11T07:21:29Z canonical: "docs.telosalliance.com/omnia9-processing-setup" --- > ## Documentation Index > Fetch the complete documentation index at: https://docs.telosalliance.com/llms.txt > Use this file to discover all available pages before exploring further. # Omnia.9 Processing Setup ## Overview The Omnia.9 audio processing is an option available for Z/IPStream R/2. It features a wide array of unique tools including our exclusive “Undo” technology and 6-band parametric EQ. Due to the wide range of parameters and processing options, Omnia.9 provides access to the settings through its own custom application, called NfRemote. As the name suggests, NfRemote can connect, monitor and manage the settings from another computer, either on the local network or over the Internet. In the s that follow, we’ll describe the main concepts and all available parameters used to configure the Omnia.9 audio processor. Since the Omnia.9 audio processing engine used with R/2 is based on the hardware audio processor by the same name, the material in this chapter was borrowed from the hardware Omnia.9 manual. Because of this, while the descriptions of the parameters will be accurate, some of the screen images might be slightly different. You may wish to download the entire Omnia.9 manual from [http://www.telosalliance.com/omnia/omnia9](http://www.telosalliance.com/omnia/omnia9). ## Accessing NfRemote and Connection Information On the main page of R/2 application, find the instance using Omnia.9 processing that you wish to adjust. Make sure the instance is running and that you have audio present. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/0(64)(1)(1)(1)(1)(1)(1).png) Click the pencil icon found on the Preset line of the instance. The page displayed next will allow you to download NfRemote to your PC if you don’t already have it. The page will display information for connecting to this instance through NfRemote. Please note that each instance uses a separate port (i.e. the first instance is 19000, the next instance is 19001, and so on). ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/1(40)(1)(1)(1)(1)(1)(1)(1)(1)(1).png) ## Using the NfRemote Client Software ### Understanding the NfRemote Connection Window NfRemote is designed to make remote connections as easy as possible. As you can see, it is possible to connect to any number of NfRemote capable processors individually or concurrently. NfRemote compatible processors include R/2 with Omnia.9, 9/XE software, 9X/2 software, Omnia.9 and Omnia.7 broadcast processors, as well as Linear Acoustic AERO.10/100/1000/2000/soft processors. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/2(36)(1)(1)(1)(1)(1)(1)(1).png) While the client software itself is not a terribly resource-intensive application, it does place some demands upon your local network. Because the client allows you to make “live” adjustments to the audio processing in R/2, and observe its meters (as well as other displays such as the oscilloscope) in real time, and on networks with sufficient bandwidth, play audio back through the remote computer, it is important to have a robust Ethernet or Wi-Fi connection between the client and the host PC. #### Comment Allows you to enter a “friendly” name for each device to which you plan to connect. #### IP Address Should contain the IP address of the Z/IPStream R/2. #### Password Should contain the same password established in the Z/IPStream R/2 application. #### Audio Streaming It is possible to stream audio from R/2 directly through NfRemote. The “Audio Streaming” dropdown menu enables this feature and determines the type of data compression used to deliver the audio as well as the oscilloscope, RTA, and FFT display information. **Automatic** Chooses the best audio format based upon connection speed. **Off** Completely disables audio streaming and the client-side oscilloscope, RTA, and FFT displays. **Force Lossy** Enables lossy streaming even on connections that are on the border of being too slow and forces lossy streaming even on fast connections. **Force PCM** Enables PCM streaming even on connections that are too slow. This choice is best reserved for local networks with sufficient bandwidth to support it. #### Connect Will initiate a connection to the R/2 or other processor whose IP address and port is currently displayed. #### Clear Removes all information from the Comment, IP Address, and Password fields. #### Add Stores the current Comment, IP Address, and Password information and carries it to the bottom of the window where it is saved for easy recall later. #### Update Refreshes the list of saved connections. #### Delete Will remove the selected connection from the list. #### Move Up/Down Will move the selected connection up or down respectively in the list so that you can sort them in any order. #### User Interface Pointing Device Offers several choices for optimizing NfRemote depending upon the type of device you are using: **Local Mouse or Touchpad** Should be selected if you are running NfRemote on a local PC or laptop. **Virtual Machine or Remote Desktop** Use this setting if you are connecting to the computer running NfRemote from another computer. This includes software like Parallels, VMware, Team Viewer, GoToMyPC, Remote Desktop Connection, or a VNC client. Wacom Digitizer users should also selection this option. **Local Mouse (Touch Simulation)** Allows you to use the finger-friendly layout of the Touch Screen option, but with a mouse. It can also be used instead of the Virtual Machine or Remote Desktop option. **Touch Screen** Provides a finger-friendly layout optimized for touch screen devices like tablets or all-in-one PC’s with a touch interface. **Touch Screen Presentation** Operates just like Touch Screen but with a large cursor, making it ideal for situations when you are using a projector for demonstration or instructing a group on how to use NfRemote. ### Client-Only Controls ![_Screen%20Shots/16-04-NfRemote%20Processing%20Home%20Screen.png](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/3(48)(1)(1)(1)(1)(1).png) The NfRemote interface looks nearly identical to Omnia 9’s window display, and will be described in another , below. Therefore, only those controls or features unique to the client software will be explained here. ### Client Audio ![_Screen%20Shots/16-06-NfRemote-Client%20Audio%20Output.png](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/4(34)(1)(1)(1)(1).png) If bandwidth permits, or if Audio Streaming is forced, additional menu items related to client audio output will be available. ## NfRemote Home Screen and User Interface Opening NfRemote displays the user interface which is divided into four basic s: The Menu Bar, the Display Windows, the Navigation Bar, and the Controls for the current menu. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/5(28)(1)(1)(1).png) ### The Menu Bar The Menu Bar is visible at the top of every screen. It shows the station currently being viewed, a “friendly” customizable location reference field (based on the instance name from R/2), the CPU load (host or client), client audio streaming volume, a Menu button, and 6 display preset buttons. The drop down arrows allow selection of what each field displays. “Client Volume” can also be used to control the volume when selected. Drag the control to adjust or double-click to bring up coarse and fine adjustment controls. #### Menu The “Menu” button has seven options: Displays Only, Tree Navigation, Folder Navigation, Expert Mode, Lock Position, Maximize, Full Screen, and Close Window. **Displays Only** Allows whichever displays you have selected to occupy the entire window while hiding the controls, useful when you want a more detailed view of the processing meters or an oscilloscope or FFT display. Clicking or tapping anywhere on the screen returns you to the normal view, which shows both displays and controls. **Tree Navigation** This is the “default” mode for NfRemote and presents the various control s in a “tree” with an overview of where within the “tree” you currently are. Click one of the s to navigate back “up” through the “tree”. For purposes of this manual (and simplicity) we will remain in this mode for the most part, though you may see some screens displayed in “tabbed” or “expert” mode. The controls are the same, even though the presentation and navigation is different. More information about these two modes can be found in the next of this chapter. **Forward/Back arrows (Tree Navigation Mode)** Moves forward or backwards between the most recently selected control pages. **Tabbed Navigation** For “expert” navigation—Displays multiple “tabs” simultaneously for quicker navigation between various control pages. **Lock Position** Makes the window non-moveable and secures it in its current position on the screen. This is especially handy on a touch-screen device if you prefer not to maximize the window. **Maximize** Resizes the window to occupy the entire screen and duplicates the function of the standard Windows “maximize” button. Once maximized, the window can be resorted to its previous size by selecting “Restore” or using the Windows restore button. **Fullscreen** Maximizes the window but removes the standard Windows frame and its minimize, maximize, restore, and resize buttons as well as the task bar and the start menu. Selecting “Restore” from the Menu exits the Full Screen mode. **Close Window** Selecting “Close Window” closes the application window and returns to the connection list. #### Display Preset buttons 1 – 6 Create and save six separate Home screens. For example, you may wish to devote one display preset to nothing but the Undo and Processing Meters to display these parameters in greater detail. Or, you could devote an entire display preset to the oscilloscope and monitor various points along the processing path to see what the various stages within Omnia 9 are doing to the audio signal. ## Navigation Modes The Omnia 9 User Interface (UI) is set up in “tiers”. The first tier always contains the highest level (most general) menu options in the form of buttons. When selected, these buttons take you to a second tier of menu options, which are also buttons, but of a more specific nature. The third tier is made up of controls. There are two navigation modes available from the Menu button: “Tabbed” and “Tree”. The default mode is “Tree”. Both modes give you access to the same number of controls; the terms refer only to the way those controls are displayed and laid out. The “Tree” mode shows fewer controls at once and has a cleaner, less cluttered look, especially in a small window. However, it requires more steps to navigate through the menu system. The “Tabbed” mode shows all tiers and available controls for selected menu s at once. This provides more direct access to items located deeper in the menu structure but may be visually more intimidating to inexperienced users. It works especially well on a large screen where you have more real estate to work with. ### "Tree" Navigation Mode ### ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/6(24)(1)(2)(1).png) The “Tree” mode is the default. In this mode: - The top portion of the screen is devoted to the display windows. - The bottom portion of the screen shows the buttons or controls for the current tier. - In between these two areas is a navigation bar that shows you exactly where you are within the menu system along with navigation arrow buttons that when selected allow you go forward or backward to places you have recently visited. - Clicking and holding either of the arrow buttons will bring up a list of these places so you can revisit them directly. - You can make individual portions of the window larger or smaller to devote more or less on-screen real estate to display windows or control windows by dragging up and down on the resize bars. Tip: Resizing the window will dynamically re-size all controls and meters on the screen. Adjust to suit your preferences. The “resize bar” between controls and metering can be moved as well to devote more screen real estate to one or the other. ### "Tabbed" Navigation Mode ### ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/7(22)(1)(2).png) Clicking on the Menu button and selecting “Tabbed Navigation” allows more direct control by displaying more information at once. In this mode: - The navigation bar and arrows are eliminated. - The top portion of the screen is devoted to the display windows. - The middle portion of the screen shows the first, second, and third tier buttons. - The bottom portion of the screen shows the third tier controls. - You can make individual portions of the window larger or smaller to devote more or less on-screen real estate to display windows or control windows by dragging the resize bars. ### Control Types There are three basic types of controls in Omnia 9: - **On/Off buttons** - These controls toggle on and off, thereby enabling or disabling the associated function. - **Drop-down menus** provide a drop-down list of options. Scrolling over each option highlights it, while a tap or left-click on a mouse selects it. - **Sliding controls** - Selecting a slider control highlights it. Tapping and holding (or left-clicking and holding with a mouse) a slider allows you to drag it back and forth to adjust its parameter. When using a touch interface, dragging the slider faster will accelerate the rate of change. As long as you haven’t lifted your finger (or released the left mouse button) you can continue to drag the slider beyond the edge of the control all the way out to the very edge of the display. Because it is often difficult to make fine adjustments on a small screen, in a virtual machine or through remote desktop, when using a touch interface you can double-click a slider to bring up a popup window with two large sliders, one for “coarse” adjustment and one for “fine.” ## Processing Metering ### Understanding the Processing Meters Display The processing meter display provides a tremendous amount of information about what’s going on inside the Omnia.9 processing, but in a very efficient and easy-to-read manner. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/8(20)(1).png) - The **ITU BS.1770 Input** meters indicate the level of the unprocessed source audio coming into each station processed by Omnia 9 with floating peak indicators above each bar. - The **AGC** meter window shows the levels and action of the Input AGC and the Wideband AGC1 compressors. It also shows the level of the Wideband AGC2 when it is enabled and positioned before the multiband . Depending upon the settings of the various Input and Wideband AGC1/AGC2 controls, the meter scale can display levels below threshold (positive numbers) as well as levels above threshold (negative numbers). When the meters dip down below “0” the compressors are above threshold and therefore in a state of gain reduction. When they rise above “0” they are below threshold and in a state of gain increase. The combination of Input AGC, AGC1, and AGC2 gain is added together to determine the total amount of AGC gain in place. - The **Input AGC** levels are indicated by a bright yellow bar. The Wideband AGC1 levels are shown as a dark orange bar extending beyond the Input AGC meter. Wideband AGC2 levels (if this compressor is situated before the multiband ) are shown as a second, darker orange bar beyond the AGC1 meter. - The **Multiband** meter window shows the levels and action of the AGC, limiter, and noise reduction s for each band (ranging from 2 to 7 depending upon the preset employed). As is the case with the AGC metering , the scale will change based upon the settings of various multiband controls. - The **AGC** level in each band is indicated by a bright yellow bar. The multiband limiter for each band is represented by a bright red bar that flashes beneath the AGC level. The multiband noise reduction for each band is shown by a dark red bar that appears to drop down from the very top of the meter. Gating - the condition in which release is significantly slowed down - is indicated by a dark red ribbon at the bottom of the multiband AGC meters. Freezing - the condition in which release stops completely - is indicated by the same red ribbon, but slightly brighter. Dry voice detection is indicated by a green ribbon in the same location. - If the **Wideband AGC2** compressor is enabled and placed after the multiband , or it is used in one of its Bass modes, its meter will be displayed separately to the right of the multiband display. The Wideband AGC3 meter will appear after the multiband as well if it has been enabled. - The **Multiband Stereo Enhancer** meters will be displayed if the current preset employs this feature. Yellow bars extending from the middle outward toward the left and right of the display indicate a widening of the stereo image. Red bars extending from the left and right edges toward the middle indicate a narrowing of the stereo image. - The **Final Limiter** meters indicate the amount of limiting activity in the final look-ahead peak limiters. - The **Output Meters** indicate the final processed output levels. ## The Home Menu The **Home Menu** represents the highest level menu available in the user interface. It includes sub-menus for Input, “Undo”, Processing, System, and (if available) “Client Audio” related options such as Client Audio Output, Client Microphone Input, Client File Recorder, and Client IP Options. If you ever lose you way when navigating the menu system, going back to the Home Menu will get you quickly back on familiar ground. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/9(19)(1)(2).png) ## Making Audio Better—One Square Wave at a Time: Undo ### What Exactly Is Undo? In order to understand how to best use Undo, it is helpful to understand exactly what it is and how it works. Undo is actually two separate processes - a de-clipper and a multiband expander – which work together to “undo” the poorly mastered, hyper-compressed and clipped audio found on so many modern CD’s. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/10(22)(1)(1)(1).png) Take a look at the two waveforms below, captured using the oscilloscope built into Omnia.9. The top window shows the damaged source audio. The bottom window shows the same audio after it has passed through the de-clipper. Notice how the peaks that were clipped during mastering have been restored by the de-clipper. Note: The oscilloscope gain was kept at the same level for comparison purposes as there is sufficient internal headroom, and the illustrations that follow do not suggest that the audio is being clipped again by any portion of “Undo”. The second stage of Undo is a multi-band expander that is designed to restore dynamic range to audio that has been excessively compressed. Each of the five bands of the expander has a corresponding psychoacoustic dynamics detector and a peak detector that examine the peak levels of the incoming audio, and based upon that information plus the settings of the various controls, tells the expander how much dynamic range to restore to the audio. The illustrations that follow show the damaged audio before de-clipping or expansion. The bottom window shows the same audio after it has been de-clipped and expanded. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/11(15)(1)(1).png) ### Undo Menu From the main **Undo** menu, you can load and save Undo presets, enable and disable the de-clipper or multiband expander, choose which functions are displayed in the Undo meter window, adjust the amount of de-clipping, adjust the dynamics detector’s ratio, weighting, and peak settings, and set the expander’s levels, rates, and ratios. TCP Link Status and Display Settings menus are duplicated here for convenience. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/12(12)(1)(1).png) A word of caution about Undo! In keeping with the “spirit” of Omnia.9, we have not blocked access to any of its controls, including those found in the Undo . And while we would be the last ones to discourage you from making the most of everything Omnia.9 has to offer, we feel that outside of adjusting the level of de-clipping, most users will get the most out of this powerful tool by using one of the provided factory Undo presets. For the more curious and brave, read on! ### Load Preset Menu The Load Preset menu allows you view the Undo preset currently on the air, toggle back and forth between the current and backup presets, load a new preset, compare the settings of two presets, and delete user presets. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/13(11)(1)(1).png) Highlighting a preset from the list places it in the Load button. Selecting the Load button puts that preset on the air and moves it up to the Current Preset position. The preset that was previously on the air will become the Backup Preset. You may also place a preset on the air from the list directly by double clicking it. After changing any parameter of a preset, an (M) appears next to the Current Preset name and the text turns yellow to indicate the preset has been modified but not yet saved. The Backup Preset also becomes the former (and unmodified) Current Preset. This allows you to toggle back and forth to hear the difference between the original and modified presets on-air by simply clicking the backup button to swap the current and backup slots. Changes to each parameter you adjusted to create the modified preset are also displayed in yellow on the specific control button in each of the processing core, providing an instant visual comparison between the modified preset and the original preset upon which it is based. You can also compare the differences between the Current Preset and the Backup Preset by selecting the Diff Preset button. Any control settings in the Current Preset that are different from those in the Backup Preset will be displayed in yellow in their respective s. In addition, the backup value of each control is indicated by a small arrow on the bottom of the control itself. Selecting the Delete Preset button allows you to permanently delete user-created presets. Factory presets cannot be deleted. ### Save Preset Menu The Save Preset menu allows you to edit the name of or save over a user preset. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/14(11)(1)(1).png) You can rename your current preset, regardless of whether or not is has been modified, by clicking in the field. Type in the new name, and select Save Preset. The new preset will now appear in the list. If your Current Preset has been modified, you also have the option to write over the existing preset without renaming it by selecting **Save Preset**. That said, we strongly recommend that after you’ve made some adjustments and are ready to save those changes to a Custom Preset you give it a unique name and instead of saving directly over your current version. That way, should there come a time when you want to revert to a previous incarnation of a preset, you can do so. You cannot, however, if you continually save over the same preset throughout your adjustment process instead of giving it a unique name. Note that that you cannot give a Custom Preset the same name as an existing Factory Preset. ### Preset Protection ![_Screen%20Shots/16-11-NfRemote%20Preset%20Protection.png](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/15(13)(1).png) Allows you to “protect” a preset from modification with a password. Enter the password and click “Protect Preset” to lock, or “Unlock Preset” to unlock an existing protected preset. ### About Preset ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/16(12).png) Allows entry of an author and description for a preset. This could be used for describing changes made in a preset. ### Undo Main Menu The **Undo Main** menu contains the controls to enable and disable Undo, to bypass Undo, and to enable and disable the de-clipper and multiband expander independently. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/17(16).png) #### Power Turns Undo completely on and off. Turning it off reduces latency and CPU load. #### Bypass Removes both the de-clipper and expander from the audio path but the Undo process itself continues to operate. This makes it possible to monitor the effects of Undo on the oscilloscope regardless of whether or not it is affecting the output audio. #### Enable De-clipper/Enable Expander Turns the de-clipper and expander portions of Undo on and off. ### Undo Metering Menu ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/18(12).png) The **Undo Metering** menu determines which of Undo’s four metering functions are displayed in the Undo Meters window. A more comprehensive explanation of how to read and understand the Undo meters is provided later in this when the various Undo controls are explained. When enabled, the **Show Dynamics Detector** Meters, **Show Expander Ratio** Meters, **Show Speed** **Governor** Meters, and **Show Expander Threshold** Meters allow the associated meters for each respective to be displayed in the Undo Meters window. ![](https://content.gitbook.com/content/iwq1pQbJhzVZFt9jeWP1/blobs/XOwaNhWX6eGx2cWVTgTi/19.png) ### De-clipper Menu The **De-clipper** menu contains a single control to set the level of de-clipping in 5 stages. Lower settings offer more conservative de-clipping action, while higher settings offer more de-clipping. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/20(10).png) A setting of Level 5 the “normal” setting and recommended for most modern material which have been mastered with high levels of compression and clipping. If your station primarily plays source material that has been cleanly mastered, you may find lower settings are sufficient. The most effective way to monitor exactly what the de-clipper is doing is to view the pre-de-clipper and post-de-clipper waveforms side-by-side using Omnia 9’s built-in oscilloscopes. ### Density Detector Band Weighting Each band of Undo’s expander has a corresponding density detector. The **Density Detector Band Weighting** controls allow you to determine how much control each detector provides its own band as well as any other expander band. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/21(14).png) To put this concept into traditional processing terms, it is similar to “band coupling” in a multiband compressor, where all bands may operate completely independently of one another or may influence one another by way of coupling to varying degrees. The degree to which each dynamics detector band influences and controls each expander band is determined by a 5 x 5 slider matrix. Each column represents a dynamics detector band, while each row represents an expander band. The default (and recommended) settings are set up so that each expander band controlled almost entirely by its corresponding dynamics detector band, but with some control provided by surrounding dynamics detector bands. Higher values mean a particular dynamics detector band has more influence over a particular expander band, and vice versa. Please note that in order to provide a means by which to allow one dynamics detector band to provide 100% of the control over a single expander band, every control must be designed to go all the way to 100. When one control is set to 100 and other controls in that band are set to a value higher than 0, thereby causing a sum greater than 100, Undo interprets that information and adjusts the settings of each band to maintain the desired proportion of influence you have set for each band relative to 100. ### Dynamics Detector to Ratio Menu The **Dynamics Detector to Ratio** menu allows you to set time constants of the expansion ratio adjustment as well as the Expansion Start levels and Transition Width levels for each of the 5 bands of Undo’s multiband expander. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/22(14).png) The Attack and Release controls for each band determines how quickly the expansion ratio will track along with the dynamic detector settings. The default (and recommended) setting is 100, which means the expansion ratio will track instantaneously with no additional delay. When the dynamics detector falls below a certain level, expansion will begin, starting at a minimum ratio of 1:1 and increasing to a maximum ratio of 4:1. The point at which that expansion begins to occur is set by the **Expansion Start** control in each band. The relative point at which the expansion reaches its full 4:1 ratio is determined by the setting of the **Transition Width** control in each band. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/23(13).png) The detected amount of dynamics in each band is indicated by the Dynamics meters (enabled in the previously described “Undo Metering” menu). Taller bars indicate more inherent dynamics in the music, while shorter bars indicate less dynamics and are generally the inverse of the Expansion Ratio meters. The result of settings in the Dynamics Detector to Ratio menu can be observed on the Expansion Ratio meters in the Undo Meter Window. ### Peak Detector Menu Undo measures audio peaks as a means by which to set the expander thresholds based upon the incoming program audio. The **Peak Detector Menu** controls the attack and release speed of each band of Undo’s Peak Detectors. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/24(12).png) The **Attack** speed controls determine how quickly Undo reacts to incoming audio peaks. Faster settings will make Undo more reactive to smaller incoming peaks by raising the threshold. Slower settings will effectively lower the threshold. The **Release** speed controls determine how quickly Undo allows the peak values to fall back toward the actual audio levels. Faster times will cause the peak levels to fall more quickly. ![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/25(10).png) The effect of the Peak Detector settings is represented by the peak “blips” at the top of the dark orange peak level bars within the Expander Threshold meters in the Undo Meter window (enabled in the previously described “Undo Metering” menu). Average levels are indicated by the bright orange bars. ### Expander Levels Menu The **Expander Levels** menu gives you access to the Relative Threshold, Band