Auto-duck music [NEW]
While working on a project, automatically generate a volume envelope to duck music behind dialogue, sound effects or any other audio clip using the Ducking parameter in the Essential Sound panel. This feature simplifies the steps needed to achieve professional-sounding audio mixes.
Multitrack clip improvements [NEW]
When recording punch-ins or layering sounds, clip Z-order is now maintained when selecting stacked clips so that smaller clips don’t get lost behind longer ones. Commands in the clip content menu make it easy to move clips to the front or back and preferences allow users to customise the behaviour. More improvements allow for symmetrical clip fades or adjusting fade curves or duration independently.
Support for Mackie HUI capable devices [NEW]
This release of Audition includes support for the Mackie HUI control surface protocol. To control your mix, transport and automation in Audition, use HUI emulation mode with almost all modern control surfaces..
Dynamics effect [NEW]
A new, modern version of the classic but discontinued Adobe Premiere Pro Dynamics audio effect has been introduced to Audition and Premiere Pro CC. This simple yet powerful plug-in offers a compressor, expander, limiter and noise gate in one easy-to-use tool.
Input monitoring [NEW]
Input monitoring allows you to preview the input coming from your recording device before starting the actual recording by either observing the level metres or listening to it.
Timecode overlay [NEW]
This release of Audition lets you view session and media timecode overlays in the Video panel. You can also lock your video output to your external display. The timecode overlay displays the current time display string as an overlay on the Video panel and the video fullscreen monitor. 
Multichannel audio workflows     
Multichannel audio workflows allow you to separate all audio channels to unique clips automatically. You can customise the channels assigned to a clip and adjust Specific Channel Routing.
Enhanced interchange with Premiere Pro
This feature enhances the Edit in Audition workflow when sending Premiere Pro sequences to Audition. Audition now supports Premiere Pro project files as the default interchange format. This allows transferring significantly more information to Audition, such as Effects and their Parameters, Submixes and Essential Sound Panel settings.
Visual keyboard shortcut editor
Use the Visual Keyboard Shortcut Editor to see which keys have been assigned shortcuts and which are available for assignment. A tooltip reveals the full command name when you hover over a key in the Keyboard layout. When you select a modifier key on the keyboard layout, the keyboard displays all the shortcuts that require the modifier.
Updated audio effects
Many existing audio effects now have spectrum metres, gain metres and gain reduction metres. You can use the frequency spectrum to identify imbalances in audio and use control points to correct them. Level Metre shows the input level of the audio and Gain Reduction Metre shows how audio signals are compressed or expanded.
Guides for getting started  
The new onboarding experience offers new users a series of guided walkthroughs of common tasks. These guides help you navigate the core functionality and capabilities with ease, including reducing background noise, mixing audio elements and producing a simple podcast. Coach marks and concise tutorials are offered inside the application to help you to get started with Audition.
Essential Sound panel    
The Essential Sound panel gives you a complete toolset to mix your audio and achieve professional-quality output. The panel provides simple controls to unify volume levels, repair sound, improve clarity and add special effects — so your video projects sound like a professional audio engineer has mixed them. You can save the applied adjustments as presets for re-use in Audition, making them handy for more audio refinements.  
Direct export from Audition with Media Encoder   
Audition can now export your edited audio directly to Adobe Media Encoder CC. This feature enables a fully linear post-production workflow, using format presets and audio channel customisation without rendering or wrangling various mixdown files.
Remixing and adjusting song duration 
Create remixes of music files from a collection. For example, you can take a song that has a longer duration and create a shorter version that still sounds like the original. You can recompose any piece of music in your collection to fit the video or project duration.
Synthesised speech 
Type or paste text and generate a realistic voiceover or narration track. Use this tool to create synthesised voices for videos, games and audio productions.
Automatic loudness correction    
Match loudness in audio clips and apply correction to support various loudness standards and true peak limiting. The Match Loudness panel replaces the old Match Volume panel.
CEP extensions
You can enable Common Extensibility Platform (CEP) extensions and build integrated panels in Adobe desktop applications.
Dynamic Link for streaming video content from Premiere Pro
The new Dynamic Link video streaming feature lets you stream video without rendering when sending projects from Premiere Pro to Audition.
Live relinking    
Audition now lets you easily replace assets within an open project. Any edits made to the original clip are retained and applied to the new material so you can work uninterrupted even when an asset changes.
Dual-display full-screen video     
Get the most out of your editing experience in Audition by using a full-screen dual-monitor workflow. Display the contents of your video panel full-screen on a secondary monitor using HDMI, DVI or VGA. This feature is especially useful for editing Foley and sound effects to video, recording automated dialogue replacement (ADR) or voiceovers and displaying your work as you edit.
Auto-backup to Creative Cloud      
Audition lets you store periodic backups of your session files to prevent any loss due to power failure, crash or file corruption. In the Preferences dialogue box, choose Auto Save and select Backup Multitrack Session Files Automatically. Then, choose a backup location that can be your Adobe Creative Cloud storage environment, the session folder or any other location of your choice.
Marker import and export
Audition can import markers from any file containing XMP marker metadata, including video files from Premiere Pro and Adobe Prelude CC. You can import markers into either an audio file (displayed in the Waveform editor) or a multitrack composition in Audition. You can share these markers with third-party applications by exporting the markers to a CSV file using the Markers panel. At any point, you can import the CSV markers file back into Audition.      
Automatic copying of imported assets to a session folder  
Audition lets you set customised levels for Yellow (Caution) and Red (Warning) indicators in the Level Metres panel. You can conform to station regulations or personal preferences by selecting customised values for level metre crossover points. In the Preferences dialogue box, select Playback and specify the Yellow and Red levels.
Timed recordings
You can now schedule recordings in advance and Audition will capture them automatically or start recording immediately for a specified duration.
Expanded video format support   
Premiere Pro CC offers extensive native media support, letting you edit all the major video, image and audio formats natively. The 2014.1 release of Audition CC supports all the native video formats that are supported in Premiere Pro.  
Enhanced Speech Volume Leveler   
The new Target Dynamic Range option in Audition provides better control over volume levelling for spoken content.
iXML metadata support    
Audition can now read, modify and generate iXML metadata. This metadata is typically captured by audio recording devices or on-location audio recording software such as Metacorder for Mac. Important features of iXML metadata are the ability to select and mark the best takes and to record on-set notes.
Customised channelisation 
To support different surround formats and configurations, Audition lets you add new customised audio channels when you create an audio file. Customised channels are typically used in audio for cinema, broadcast and video games. 
Enhanced multitrack environment   
Audition provides several user interface improvements to help you work with multitrack projects more efficiently. Visual enhancements such as improved visibility, minimising tracks you’re not working on and randomising designated track colours help you to work more easily with complex audio projects. 
Sound Remover effect    
The Sound Remover effect removes unwanted audio sources from a recording. This effect analyses a selected portion of the recording and builds a sound model, which is used to find and remove the sound.
Click/Pop Eliminator and DeClicker effects    
Use the Click/Pop Eliminator and DeClicker effects to remove microphone pops, clicks, light hiss and crackles. Such noise is common on recordings such as old vinyl records and on-location recordings.
ITU Loudness Metre   
Audition now has an integrated, customised version of the TC Electronic Loudness Radar metre plug-in. Available in both the waveform and multitrack views, it provides you with information about peak, average and range levels. 
Pitch Bender and Pitch Shifter effects   
Use the Pitch Bender effect to change the tempo over time to vary the pitch. The effect now uses a keyframe edit envelope laid across the entire waveform, similar to the Fade and Gain Envelope effects. Use the Pitch Shifter effect to change the musical pitch. It's a real-time effect that can be combined with other effects in the mastering rack or the effects rack.
Preview editor    
You can now see in real time how the waveform looks before you apply changes. Or work on separate regions of a file simultaneously. This functionality is especially valuable when you’re working with effects that alter the duration of a clip. Choose View > Show Preview Editor to display the preview.
Frequency band splitter  
Use Frequency Band Splitter to take one audio clip (or a selection in a clip) and make up to eight copies, where each copy contains a different frequency range found in the original clip. The crossover frequencies determine the split points. Each copy of the waveform is created as a new file and placed in the Files panel. You can then edit or apply effects to each band separately.
Waveform editing with Spectral Frequency Display     
You can now easily add, remove and invert spectral selections made using the marquee, lasso or paintbrush selection tools.
Smart track colours  
To make it easier to identify tracks, a colour bar is added to the tracks. These colour bars are added on the left of the track header or at the bottom in the mixer panel. When you add a clip to a track, the clip colour changes to match that of the track.
Paste control for multitrack sessions 
New functionality allows you to control paste operations in a multitrack session: You can choose to paste all clips in the same targeted track or in multiple tracks. Press Alt while dragging to toggle. You can specify the default behaviour in the Multitrack Clip preferences. When enabled, a new preference avoids overlapping clips when inserting or pasting new clips creates new tracks.
Phase Analysis panel  
Use the Phase Analysis panel to reveal out-of-phase channels for stereo waveforms. The Phase Analysis panel also shows stereo separation. You can choose from several phase views, including Histogram, Mid/Side, Lissajous and Phase Wheel. For additional display options, right-click the graph and choose an option.
Edit Favourites feature        
Use the new Favourites panel to record, view, organise, run or edit your favourite tasks. To display the Favourites panel, choose Window > Favourites or Favourites > Edit Favourites. 
Audio extraction from CDs
Extract selected CD tracks to a single file. Insert an audio CD into an optical drive and choose File > Extract Audio from CD. Select the tracks and enable Extract to Single File.
Faster, more precise editing
Select multiple clips and choose Clip > Groups > Group Clips. You can move and edit grouped clips together and even stretch them proportionately when clip stretching is enabled. Group stretch, gain, colour and other settings are available in the Properties panel.
Real-time clip stretching 
Quickly stretch clips to the necessary length, while previewing the results during playback. In the Editor panel, select multiple clips to stretch them proportionately. In the Properties panel, choose from a variety of stretch types optimised for different audio content.
Automatic speech alignment       
To quickly align overdubbed dialogue with original production audio, use automatic speech alignment. Audition matches the timing of each word, even if the original audio is noisy or differs in overall length.
Control surface support and parameter automation
Mix audio interactively with popular control surfaces using the EUCON, Mackie MCU or Logic Control protocols (including the Avid Artist series formerly made by Euphonix). Or use third-party, tablet-based controllers that support these protocols. You can even use multiple devices simultaneously. 
Manual and automatic pitch controls
The Manual Pitch Correction effect lets you visually adjust pitch with the Spectral Pitch Display. The Spectral Pitch Display shows the fundamental pitch as a bright blue line and overtones in yellow to red hues. Corrected pitch appears as a bright green line. The Automatic Pitch Correction effect is available in both the Waveform and Multitrack editors. In the latter, its parameters can be automated over time using keyframes and external control surfaces.
Enhanced radio automation support   
Audition CS6 fully integrates with radio automation systems.