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Some dialogue problems can’t be fixed. Distortion, errant sirens, wind gumming the microphones—it’s impossible. The truth is, with iZotope RX, you can fix all sorts of previously impossible problems. Here are six tips to get you out of a dialogue bind.

Import: Supported File Formats

IMPORT: Audio File FormatsIMPORT: Video File Formats **
AAX (Audible)

** Note about Importing Video File Formats

  • Importing any of the Video file formats listed above will import the Audio only, RX does not support video playback.
  • RX 6 Audio Editor requires having QuickTime installed to open QuickTime formats (like .MOV).

Tip: Option for opening Split Stereo files in one tab

Mono audio files with (.L and .R) or (.1 and .2) extensions can be opened as either mono files (2 mono tabs) or split stereo (1 stereo file tab). See Preferences > Misc for more information.

Export: Supported File Formats

EXPORT: Audio File Formats

File Format Dependencies

Some file formats may have dependencies based on your operating system that may prevent you from importing them into the RX Audio Editor. For example, Windows native formats (like WMA and WMV) may not open on Mac and QuickTime formats (like AAC, MOV, and M4V) may require installing QuickTime on Windows and running RX 6 Audio Editor in 32 bit mode.

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Knowledgebase Article about Supported Audio and Video Formats

For the most up-to-date information about supported audio and video formats, check out this knowledgebase article:
Supported Audio and Video Formats KB Article

Creating New Files

To create a new file in RX:
1. Open the File menu
2. Select “New…”
3. You will be prompted for the name, sample rate and channel count of the new file you are creating.

Tip: Create a new file from the contents of the clipboard

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If you have existing audio data in your clipboard (for example, if you have copied a selection from an existing file in RX), you can create a new file based on that audio data.

  • Open the “File” menu, choose “New from Clipboard” or use the keyboard shortcut: Command+Shift+N (Mac) or Ctrl+Shift+N (Windows)
    The new file will match the sample rate and channel count of the audio data present on your clipboard.

Importing Files

There are four ways to import a file into the RX 6 Audio Editor:

  1. From the File menu, select Open… and select the files you want to open.
  2. Drag and drop a file from your operating system into the RX UI.
  3. Drag a file from Finder/Explorer to the RX icon in the Dock/Desktop.
  4. Double-click on the RX logo in the middle of the RX Audio Editor interface when no files are loaded in the application

Managing File Tabs

RX supports having up to 16 files open at once.

You can navigate between tabs by clicking on a tab or using the following keyboard shortcuts:

ActionMac Keyboard ShortcutWindows Keyboard Shortcut
Select File Tab to the right of the current selected tabControl+TabAlt+Tab
Select File Tab to the left of the current selected tabControl+Shift+TabAlt+Shift+Tab
  • If you right click on a file tab, you can access options for closing tabs.

  • If you have multiple files open, an arrow button will appear to the right of the last visible tab. You can access file tabs that are not currently visible by clicking on the arrow button and selecting a tab from the menu.

Saving Files

There are a number of ways to save a file in RX 6 Audio Editor. The Save Operations include:

NameDescriptionDefault Mac ShortcutDefault Windows Shortcut
SaveFor uncompressed file formats (.wav or .aiff): Overwrites the original file on diskCommand+SCtrl+S
For compressed file formats: Opens the Export File dialogCommand+SCtrl+S
Save As…For uncompressed file formats (.wav or .aiff): Save a copy of your file using the same file formatCommand+Shift+SCtrl+Shift+S
For compressed file formats: Opens the Export File dialogCommand+Shift+SCtrl+Shift+S
Save RX DocumentSaves file as .rxdoc file extension (more information below)
Save RX Document As…Saves copy of your .rxdoc file


The RX Audio Editor will automatically save backups of your editing session by default. When the RX application is launched, it will open your most recent editing session. The option to turn it off is located under the Preferences > Misc tab as “Resume last editing session when app starts.”

Saving RX Documents

You can save a file using the RX Document file format (.rxdoc) to archive your edits. An RX Document includes your original file, all the edits you’ve made to it, and your most recent selection and view state. RX Documents can only be opened in the RX Audio Editor. If you need to save your file so it can be opened somewhere else (like a DAW or media player), you need to export it in another format (like WAV or AIFF).

To save an RX Document, select File > Save RX Document… and select where you would like to store the file.

Keep in mind that the size of the RX Document file can be very large, especially if your list of edits include multiple processes on the whole file.

Export Options

When exporting, you will be able to define the output file name, directory, and bit depth. There are four ways you can export a file in RX 6 Audio Editor:

  1. Export File
  2. Export Selection
  3. Export Regions to Files
  4. Export Screenshot
  5. Export History as XML

Export File

  1. Select File… > Export
  2. Select the file format you want to Export to and adjust the associated settings as desired (available settings explained in the table below)
  3. Click “OK”
  4. In the system window, name your file and choose where you would like to save it to
  5. Click “Save” to export your file


  • Checking the Reopen file in RX checkbox will open your exported file in the RX 6 Audio Editor after the export completes successfully

Export Format Options

RX 6 offers the folowing file type options for export:

  1. WAV
  2. AIFF
  3. FLAC
  5. MP3 [STD & ADV]

The following tables outline the export options for the different file formats.

Uncompressed Export File Formats

Uncompressed FormatBit DepthDitherBWFPreserve non-audio data
WAV16 bit, 24 bit, 32 bit (float), 32 bit (int)None, White Noise (TPDF), Noise shaping (MBIT+)Outputs a broadcast wave format fileExported file retains the metadata of the original file
AIFF16 bit, 24 bit, 32 bit (float), 32 bit (int)None, White Noise (TPDF), Noise shaping (MBIT+)n/aExported file retains the metadata of the original file

Compressed Export File Formats


FormatBit DepthDitherCompression Level
FLAC8 bit, 16 bit, 24 bitNone, White Noise (TPDF), Noise shaping (MBIT+)Adjusts the compression strength of the FLAC encoder. Stronger compression requires more CPU time during file encoding but results in a slightly smaller file. FLAC compression setting does not result in any quality change to the signal since FLAC is a lossless format.


FormatQualityModeBit Rate
OGGAdjusts the bitrate of the Vorbis compression algorithm. Higher bitrate values result in higher audio quality, but also increase the file sizen/an/a
MP3 [STD & ADV]n/aControls how (or if) bit rate varies over time. Constant bit rate (CBR), Average bit rate (ABR), Variable bit rate (VBR)Adjusts the bit rate of the MP3 compression algorithm. Higher bit rates result in higher quality audio but will increase the file size

Export Selection

This option will allow you to export only the audio that is contained within your current selection, as opposed to the entire audio file.

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  1. Select File > Export Selection, and the Export File dialogue box appears.
  2. Follow the additional aforementioned steps.

Export Regions to Files

This option allows you to export multiple regions of any audio file that has regions as discrete audio files. To export regions:

  1. Select File > Export Regions to Files.
  2. Choose the exported file format in the Export window
  3. In the File Save dialogue box, navigate to where you want to save the files.
  4. If you want, enter a prefix for your series of files in the Optional prefix field.


    • If you choose not to add a prefix, the names of the files will be the names of the regions. If any regions have the same name, numbers will be appended sequentially.

  5. Click Save.

Export Screenshot

This option allows you to export your current Spectrogram/Waveform display as a PNG image file. This can be very helpful for archiving any restoration process or for forensic documentation.

When clicking on Export Screenshot from the File menu, your current Spectrogram/Waveform view will be used for adjusting your screenshot size and position.


The Spectrogram/Waveform transparency balance must be set before selecting File > Export Screenshot as this cannot be changed in this window.

To define the size of your screenshot, simply click and drag in order to enlarge or shrink the screenshot window. The dimensions of your resulting screenshot will update automatically, however these can also be entered manually by clicking once in either Width or Height.


The max resolution attainable for your screenshot will be limited by the individual computer’s screen resolution.

When you are finished changing the dimensions of your screenshot, click on the Save button to name and save your .PNG screenshot to your chosen directory.

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To save screenshots faster (at the expense of having a larger file on disk), disable Maximum image compression.

Export History as XML


Export the Undo history list of your current file tab to an xml document

File Info

The File Info window can be opened by clicking Window > File Info and has two sections; General Info and More Info. The More Info section lists information dependent on the file type. The following table describes the information in each section including a list of possible entries in the More Info section:

General Info section

NameThe current filename
DurationLength of the file
Sampling rateThe original sampling rate of the file
Bit depthThe original bit depth of the file
ChannelsMono or stereo
Size on diskSize of the file in bytes

More Info section

Created by
Originator reference
Date created
Time created
BWF version
Coding history
Track Title
Track Number

Closing files

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There are two ways to close a file:

  1. Close: if you close a file that has uncommitted changes (represented by a dot or asterisk next to the file name in the tab display), RX will ask you if you want to save the file. RX does not ask about saving files when the application is closed because your changes are retained in its session data.
  2. Close All: if you have any uncommitted changes in open files, RX will prompt you to save for every unsaved file.

The default keyboard shortcuts for closing files are:

ActionMac Keyboard ShortcutWindows Keyboard Shortcut
Close the current file tabCommand+WCtrl+W
Closes all file tabsCommand+Shift+WCtrl+Shift+W



  • Some hardware devices monopolize the audio drivers when sending audio clips to RX via RX Connect. If you are not able to hear the audio sent to RX from your DAW with RX Connect, change the audio driver to RX Monitor in the Driver type menu.
  • Driver Type: Allows you to select a sound card driver model to use for playback and recording.
  • Input/Output Device: Choose the device/sound card you want RX to use for playback and recording.
  • Buffer Size: The total playback buffer size. In general, lowering these buffer sizes will improve meter responsiveness and lower latency, but increase CPU needs. Raising buffer sizes will lower CPU cost but increase latency. It’s worth exploring these ranges to find values that work best on your system.
  • Num Buffers: Number of playback sub-buffers. (Windows MME Only.)
  • Composite View gain reduction: Nondestructively reduces the output gain of all clips included in the Composite View tab by the amount specified in the dropdown.
  • Channel Routing: For ASIO and CoreAudio drivers, click this button to choose which input and output channels RX uses. Click the Channel Routing button to open the Channel Routing dialog box.
  • Configure Driver: Launches the manufacturer’s driver configuration dialog.
  • Release when not in use: Auto-closes the audio device when playback in RX stops, freeing it for use in other audio applications. Disable this if playback from RX isn’t responsive enough.
  • Test Tone: The test tone generator is useful for testing your speakers, audio hardware and listening environment. Tones at set frequencies or at a custom frequency can be used as test tones, as can white or pink noise. In addition, a Channel Identification mode will identify left and right speakers.
    • Enable: Starts playback of a test tone.
    • Type: Sets the type of test tone to play.
    • Volume: Sets the volume of the test tone.
    • Frequency: Sets the frequency of the test tone.
  • Output Gain: Output gain allows you to nondestructively adjust the playback level of RX 6 Audio Editor.


  • Show tooltips: When enabled, hovering over an RX feature with the mouse cursor will show a short description of the feature.
  • Display cursor coordinates in status bar: When enabled, the time coordinate of the cursor is shown in the status bar at the bottom of the RX main window. The amplitude of the audio at the cursor position and the frequency at the cursor position is also shown.

  • Show analog waveform: When digital audio is played back, it is converted to analog. The peak values in the analog waveform can be larger than the peaks in the digital waveform, leading to clipping in the output of a digital-to-analog converter. When Show analog waveform is enabled, RX will compute an analog waveform in the background. Any peaks will be highlighted in red on top of the existing digital waveform.


    RX will automatically display an analog waveform when zooming in at extreme zoom levels.

  • Offload waveform calculations: When enabled, RX’s waveform display will be computed in the background. This allows very large files to be loaded very quickly, but it slows down RX’s waveform displays.

  • Waveform interpolation order: If you zoom into the waveform so that individual samples become visible, RX will display an upsampled analog waveform as well as the individual digital samples. The interpolation order controls the quality of upsampling. Higher values yield more accurate analog waveforms at the expense of CPU usage.

  • Brightness: Adjusts the general brightness of the RX interface, allowing you to make RX more readable on your specific display.

  • Floating window opacity: Changes the opacity for RX’s floating windows. This can be useful if you wish to leave floating windows on top of the spectrogram and waveform without completely obscuring the display.


Customizing Keyboard Shortcuts

While RX includes default keyboard shortcuts, you can also customize them to your liking.
Refer to the Keyboard Shortcut Guide to reference a list of default RX key commands and find the internal shortcut command names used by RX. Referring to the guide can help you quickly identify the name of the key commands you want to customize and search for them in the “Show commands containing” field (explained below.)

  • Presets: Save groups of key assignments with this tool.
  • Show commands containing: Lets you search by keyword for a command you want to assign to a keystroke.
  • Shortcuts for selected command: Shows if there are any keystrokes assigned to the command selected in the above menu.
  • Remove: Removes the currently assigned keystroke from a command.
  • Press Shortcut Key: To assign a new keystroke to a command, select the command from the menu, then click in this field and press a key or combination of keys.
  • Assign: Assigns the entered keystroke to the current command. The shortcut will only be assigned to the current command if you press this button.
  • Shortcut key currently used by: Lists commands that the current keystroke is assigned to.

    Using the Alt modifier on Windows

    On Windows systems, by default, “Alt + a letter” will open the corresponding menu for your currently open application. Alt + V for example will open RX’s View menu drop down. By default, none of RX’s shortcuts should conflict with these keyboard shortcuts, however if you wish to assign Alt + V to another operation, it will take precedence over the View menu.


  • Session data folder: Allows you to choose a different folder to save RX’s temporary session data. These files are created to allow actions to be undone and sessions to be recalled in RX. Because these can be very large, it is best to set this to the drive on your computer with the most free space.
  • Time scale frame rate: This sets the frame rate used to draw the time scale when RX is set to display the time code (see View menu or right-click the time ruler to change this setting). Choose from a list of standard frame rates or click in the combo box to define a custom frame rate.
  • Default full-bandwidth paste mode: This controls RX’s behavior when pasting a full-bandwidth audio selection. Insert will move aside existing audio, Replace will overwrite existing audio, and Mix will add to existing audio.
  • Default limited-bandwidth paste mode: Similar to the full-bandwidth paste mode, this controls RX’s behavior when pasting a limited-bandwidth audio selected.
  • Resume last editing session when app starts: When enabled, RX will open all of the files (including edits, processing and undo history events) that were present when RX was last closed. Disabling this option will open the RX Audio Editor in its default state (no files loaded.)
  • Automatically open files ending with .L and .R as split stereo: Mono audio files with (.L and .R) as well as (.1 and .2) extensions will be opened as stereo files when this option is enabled.
  • Recall selections during undo/redo: When this is enabled, RX will recall the selection used for an item in the undo history. When stepping through the undo history events, selections that were used for each event will be restored along with the audio.

    Disabling the selection undo/redo option

    • Sometimes it is useful to turn this off if you need to compare undo history items and not break your current selection (like a useful loop).

  • Play only selected channels: If only a single channel of audio is selected and this option is enabled, all other channels will be muted during playback.
  • Calculate RMS using AES-17: Uses the AES-17 1998 standard for RMS calculations (0 dB is a full scale sine wave) in the level meter, Waveform Statistics and Leveler modules. The other option is when 0 dB is the RMS of a full-scale square wave. These options differ by 3 dB.
  • Pre- and Post-Roll during preview (ms): When Previewing audio processing in any module, the specified time amount will be added to the beginning and end of the previewed selection in order to provide contrast between unprocessed and preview-processed audio.
  • Selection Feathering (ms): Allows for crossfading of processed and unprocessed audio when processing. If you need to make more precise edits, set this to 0.

Auth & Updates

Provides options to authorize or de-authorize RX (explained in the Authorization chapter), launch the iZotope Updater and choose how often the Updater automatically checks for updates.


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RX 6 Audio Editor supports the use of the following plug-in formats in the “Plug-in” module:

  • VST 2: Windows and Mac
  • AU (AudioUnit): Mac Only
  • DirectX: Windows only
  • Plug-in Lists: Displays plug-ins that have been scanned for use in the “Plug-in” hosting module of the RX Editor.
  • Enable: Enables that plug-in format for use in the RX Audio Editor. This will trigger plug-in scanning to begin in the background.
  • Disable: Disables the associated plug-in format. This will clear the scanned plug-in list for that format. Re-enabling that plug-in format will prompt RX to re-scan that plug-in format.


    • If a plug-in failed scanning for any reason, the plug-in’s name will be prefixed with an error tag (ex: [Crashed] or [Failed]) to help troubleshoot the failure
  • VST plug-in folders: Allows you to add or remove custom VST2 plug-in folder paths. RX uses the system VST2 plug-in folder by default. If you are using a custom directory for VST2 plug-ins, use this option to ensure that those VST2 plug-ins will be scanned.

    Djay pro apk obb. Note about sub-folders when scanning for plug-ins

    • RX will scan the first level of sub-folders in the custom VST2 folder. If some of your plug-ins do not show up when you scan them, and you know they’re in a subfolder of your plug-in folder, try moving them up one directory level.
  • Group plug-ins by name in plug-in menus: When enabled, the RX plug-in menu will group plug-ins by common first words, usually the manufacturer’s name. When disabled, the RX plug-in menu will appear as a single, alphabetically sorted list.

  • Rescan: If RX detects that a plug-in is unstable, it will blacklist it and prevent it from being opened. The rescan option allows you to clear the blacklist of unsupported plug-ins and rescan all installed plug-ins in case an RX update or an update from the plug-in manufacturer resolves the issue.