Izotope Rx View Spectrogram

 
Izotope Rx View Spectrogram Rating: 3,9/5 7295 reviews

Sep 25, 2014 The human voice is much more complex than it might seem from looking at the waveform view. Each word is made up of a fundamental frequency (at the bottom of the spectrogram), harmonics that extend above that frequency, sibilance (“S” sounds) that begin or end words, and more. Jan 01, 2011  Figure 1: The stand-alone version of iZotope RX 2 Advanced. The right side of the GUI provides access to processing modules. Clicks in the audio file are displayed as three vertical lines in the center of the golden spectrogram, in which the floating waveform overlay is disabled. Apr 20, 2017  Dialogue Isolate in iZotope RX 6 Advanced is designed to separate spoken dialogue from non-stationary background noise such as crowds, traffic, footsteps, weather, or other noise with highly.

Sep 16, 2018  IZotope RX 7 Audio Editor Advanced 7.00 Free Download New and latest Version for Windows. It is full offline installer standalone setup of IZotope RX 7 Audio Editor Advanced 7.00 Free Download for compatible version of windows. Program was checked and installed manually before uploading by our staff, it is fully working version without any problems. Apr 20, 2017 Dialogue Isolate in iZotope RX 6 Advanced is designed to separate spoken dialogue from non-stationary background noise such as crowds, traffic, footsteps, weather, or other noise with highly.

Overview

Below the Spectrogram display is a toolbar that gives you several options for interacting with your audio. The toolbar is split into three main categories, Navigation, Instant Process, and Selection.

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The Zoom tools help navigate the spectrogram, the Selection tools help you isolate and edit individual sounds within the spectrogram, and the Instant Process category turns each selection tool into a magic eraser of sorts, which will immediately process any audio problem you paint over.

Zoom Tools

From RX 6 Audio Editor’s main window, you can zoom in horizontally and vertically on both the waveform and spectrogram views.

Zoom Selection Tools

From left to right: zoom in, zoom out, zoom to selection, zoom to whole file, zoom tool.

  • Zoom in will zoom in the time domain
  • Zoom out will zoom out in the time domain
  • Zoom to selection will zoom in on whatever you have selected
  • Zoom to whole file will reset zoom
  • Zoom tool: allows you to zoom in on a selection. With Zoom tool engaged, you can select the Time, Time/Frequency, or Frequency selection tools to to zoom immediately after making a selection.

Zoom Sliders

The slider controls to the lower right of the spectrogram can be adjusted to control zoom. The vertical slider can be set to control either the waveform or the spectrogram: their ranges can be controlled independently. The currently selected mode for this control is indicated by the illuminated icon.

Grab & Drag Tools

Grab & Drag Tool

When zoomed in on an area, the Grab & Drag Tool [G] can be used to move through the time range by clicking and dragging on the Spectrogram.

Dragging rulers and using the Mousewheel

  • The rulers to the right and below the Spectrogram display can clicked and dragged to reposition the spectrogram and waveform to show a different time range, amplitude range or frequency range.
  • In addition the range shown can be adjusted with your mouse wheel, just place your cursor on top of a ruler and the mouse wheel will adjust the zoom for that ruler.
  • To reset any of the rulers to the default display range, double click on the ruler.

    Note

    • All active selections will be accurately preserved and scaled when zooming the main display.

Channel Selectors

Channel Selectors [Ctrl/Cmd-Shift-L[eft]/R[ight]/B[oth]] Appear on the left hand side of the spectrogram/waveform display and allow you to select or deselect individual channels of a stereo file. This is useful for auditioning, making selections and processing on only one channel of a stereo file.

  • Single-clicking on either channel selector will select only that channel.
  • Double-clicking on either channel selector will select both channels.

Instant Process [STD & ADV]

Instant Process [I] is a mode that may be toggled on/off and affects the behavior of the selection tools.

When Instant Process is enabled, any selection you make is immediately processed by the module selected in the instant process menu. The module settings applied by instant process reflects the current settings in the selected module.

When Instant Process is disabled, processing, editing and selection tools will function as they normally do.

Note

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If you hold Shift while using Instant Process, this will allow you to build up additional selections. Once you release Shift, processing will occur. This is especially useful for tools such as the Magic Wand, which will pick up additional harmonics upon second click. If you don’t like that selection, also hold Alt, and start redrawing a new selection. Release Shift once you’re ready to process.

Instant Process offers several different modes, accessible via a drop down menu, which will instantly process the settings present in the named module/tab. The default settings are used, but if you define custom settings in that module, Instant Process will recognize and apply those custom settings. The modes are:

Instant Process: Attenuate

This mode will instantly apply the active settings from the Spectral Repair module’s Attenuate tab. This is particularly useful if you see anything in the spectrogram you don’t wish to remove entirely, but would rather quickly blend into the surrounding audio to make it less obvious or intrusive.

Instant Process: De-click

Applies the active settings from the De-click or Interpolate modules. De-click Instant Process will automatically remove all clicks present in your selection, which is particularly useful for editing a dialogue file, mismatching sample rate clicks and pops, and vinyl clicks.

If you make a selection under 4000 samples in length, this mode will automatically use the Interpolate module. Selection longer than 4000 samples will use the settings from the De-click module. The De-click module is effective on selections above 4000 samples in size, as it is able to identify clicks in relation to desirable audio, and then intelligently separate and remove the clicks. If a selection is less than 4000 samples in length, it is likely a small selection of an individual click, and Interpolate will fill the selection with audio information based on the surrounding audio.

Instant Process: Fade

This mode will instantly apply the active settings from the Fade module. This is particularly useful if you’d like to smooth over a transition or edit point within a complex audio file, especially if it’s a limited bandwidth selection, such as choosing to fade in a certain harmonic or audio event in an audio file without changing the volume of the rest of the audio.

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Instant Process: Gain

This mode will instantly apply the active settings from the Gain module. If you want to quickly adjust certain audio events up or down in volume, you can simply paint over it to see the immediate gain adjustment. For overall volume adjustment, use the Clip Gain line [Cmd+G / Ctrl+G].

Instant Process: Replace

This mode will instantly apply the active settings from the Replace tab in the Spectral Repair module. This is particularly useful if you see anything in the spectrogram you wish to remove entirely, as it will use the audio information that surrounds your selection to instantly and intelligently fill the gap.

Selection tools

One of the key benefits of RX is that it allows many options for selecting audio not just by time, but also by frequency. This allows you to do work with sounds that fall in only part of the frequency range at a given point in your project. This is very helpful for isolating and repairing a variety of audio problems, including intermittent background noises.

IconNameDescription
Time selection tool [T]Select a range of time within the file (horizontally within the spectrogram)
Time-Frequency Selection tool [R]Makes rectangular selections in the spectrogram display to isolate sounds by time and frequency
Frequency Selection tool [F]Makes frequency only selection (vertical in spectrogram)
Lasso Selection tool [L]Makes a selection based on a free-form outline drawn with your cursor on the spectrogram
Brush Selection tool [B]Draw a free-form selection using a defined brush size in time and frequency in RX’s spectrogram. The size of the Brush Selection tool can be adjusted by clicking and holding on the Brush Tool icon.

Note

With the brush tool selected, you can also hold Control/Command and move the mouse wheel to make the brush size larger or smaller.

Magic Wand Selection tool [W]Automatically selects similar harmonic content surrounding the selected material. Click on the spectrogram to select the most prominent tone under the cursor when the magic wand is selected.Clicking on an existing selection with the Magic Wand tool will automatically select the overtone harmonics or related audio components of your current audio selection.

Note

You can use the Brush or Lasso tools first to broadly define a sound and then use Magic Wand to refine your selection to include relevant harmonic material.

Harmonic Selection tool [Shift+Cmd+H / Shift+Ctrl+H]The will duplicate your current selection to include harmonics above it. Start by selecting the fundamental frequency of audio with harmonics, then add or remove harmonic selections with this tool before processing.

View Clip Gain


Quckly enable/disable the clip gain overlay.

Selection modifiers [PC/Mac]

[Shift] - Add to selection: Hold down shift after making a selection in order to add another, separate selection. If any part of the new selection overlaps any other, the selections will be grouped into one.

Use Shift to combine different selection types:

This can be especially powerful when combining several selection tools to create multiple selections of different size and shape.

Multiple selections made using the Shift modifier key with different selection tools

[Alt/Option] - Subtract from Selection: Holding down Alt/Option will allow you use the currently chosen selection tool to remove or erase any portion of an existing audio selection. This can be especially useful with the Lasso or Brush tools, allowing you to edit or refine any piece of an existing selection.

This is also useful for refining complicated free-form selections. First make your lasso, brush, or magic wand selection, and then hold alt while using the time, frequency, or time and frequency tools to exclude entire time and frequency ranges from processing.

Use Alt/Option modifier to remove from the active selection:

Holding Alt/Option effectively turns the Brush tool into a selection eraser for broad refinements and Lasso into a selection “X-Acto knife” for detailed selection revision.

Selections refined to perfection using the Alt key modifier

Linking Selection State to Undo History Events

Using Ctrl/Cmd-Z to undo any particular process will also bring back the previous audio selection exactly as it was before applying any processing. In order to make use of this feature, be sure that Store Selections with Undo History is enabled inside of RX’s Preferences > Misc menu.

[Ctrl/Cmd] - Move Playhead without affecting Selection state: Hold down Ctrl/Cmd to move the transport’s playhead to any position without erasing your current audio selections. This can be especially useful with previewing or comparing complex audio selections without having to remake these specific audio selections.

[Mouse Over] - Grab and Drag Selection: After using any of RX’s tools to select a portion of your audio, when the mouse is subsequently placed on top of any selection, a Grab and Drag hand cursor will be displayed automatically, allowing you to change the position of that selection.

iZotope RX is the industry standard audio repair tool that’s been used on countless albums, movies, and TV shows to restore damaged, noisy audio to pristine condition. In April, iZotope released version 6 which brought the biggest ever update to the software with a new slant towards helping musicians with their audio issues, as well as plenty of improvements that continue to make the lives of post-production professionals all the more easier.

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Pianist, writer and friend of Time+Space, Tony Cliff, recently took RX 6 Advanced for a test run, here’s his review, complete with some handy audio examples…

iZotope is an award-winning and innovative company developing groundbreaking audio products many of which have become industry standard. Well-known products include Ozone 7 (the powerful music mastering suite), Nectar 2 (the comprehensive vocal production suite) and the recently released RX6 audio repair suite designed for both music and post-production work.

We live in an increasingly aural and visual world nowadays where clarity of audio is expected to accompany compelling film and video visuals. More and more people are regularly podcasting or making videos recordings and these all require good quality sound to convey their meaning. Imagine the situation where you are required to interview someone but you only have access to very average equipment and this interview takes place in a noisy environment. This might well be your only chance to conduct the interview and it is not possible to do it again. Having no time for re-takes or proper checking of the interview you get back home and listen to your recording to find a horrendous amount of background noise distracting from the interview. I am sure such a scenario is quite commonplace and provides an example of where RX6 can often save your reputation and rescue your recording.

Who is RX6 designed for?
Who is iZotope RX6 aimed at then? One major market for RX6 is for anyone involved in post-production work, filming, making videos
or podcasting. RX6 has modules to cater for problems such as wind noise, lavalier mic rustle and isolating dialogue and is able to turn a problematic audio recording into one suitable for professional broadcast. You may find after your video recording session that there are issues which you did not realise at the time. To set the shoot up again may be impossible to arrange or too expensive and in such situations RX6 can prove a life-saver. Another market for RX6 is for musicians since it includes a host of invaluable modules for audio repair and enhancement such as de-essing, de-clipping, or de-bleed with the last being able to remove headphone click track bleed from a vocal recording.

Different Editions
iZotope RX6 comes in three different editions: RX Elements, RX6 Standard and RX6 Advanced. The first of these is a useful but somewhat cut down edition so I will really be discussing the Standard and Advanced Editions. The premier version has a number of very useful modules which are not in other editions including De-rustle, De-wind, Dialogue Isolate, Ambience Match, Azimuth, Centre Extract, Deconstruct, EQ Match, Leveler and Loudness. The Advanced edition also enables many useful modules to be directly available as plug-ins for your DAW in the usual formats (VST, AU, AAX) without needing to load up RX6 itself. Sometimes, however, your work may need to be carried out in the full standalone edition of RX6. In this case there is the useful RX-Connect plugin which transfers audio back and forth between your DAW and the full RX6 program for audio processing and RX-Connect is offered in both the Standard and Advanced version.

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Spectrogram and Wave-Form View
Once an audio file is loaded into RX6 it is displayed in both wave-form view and spectrogram view with the midway setting showing both at the same time but you can of course choose to display more of one or the other depending on your needs. The spectrogram view often gives valuable insights into problem areas within the wave file and can often show more precisely at which frequencies problems, such as hum or noise, are occurring. There are all the usual facilities for zooming in and out within the display and of course cut, copy and paste.

The advantage of the spectrogram view is that the dominance of certain frequencies are shown by the brighter and more vivid display in the spectrogram view. This may enable you to see where unwanted sounds occur and then surgically remove them without disturbing the overall natural sound background. This type of detailed editing could typically be undertaken using the ‘Spectral Repair’ module. Whilst RX6 is an extremely powerful and sophisticated program there are numerous excellent presets available within the various modules and these may achieve your desired results with little adjustment necessary. Often a very useful technique is to use the ‘compare’ function to make a series of edited versions. Change some settings and parameters in the module and click ‘compare’ and new version of the audio is made for you to audition. This way it is easy to make five or more different versions and then compare each edit to ascertain which one has worked out best before choosing the one to use in processing your audio.

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Post-Production Audio
There are many modules within RX6 and a number are clearly geared towards the needs of post-production audio for film, video and broadcasting but there are also modules which are extremely valuable within a music context or modules that crossover to be useful in almost any audio context.

The De-Rustle module is designed to correct and reduce the effects of noise produced by someone wearing a lavalier microphone and the problems of the rustle of clothes or other interference.

The De-Wind module is designed to reduce the effects of wind noise affecting a microphone especially when you may be recording outside without a ‘dead-cat’ microphone cover to help alleviate such noise. The ‘compare’ function is a very useful feature again here as you can keep making adjustments to the settings and then take the best of the selection before processing your audio.

Dialogue Isolate is another very useful module for anyone who has made an interview in a noisy environment. I tested this one out by using my iPad to record some dialogue whilst my TV was on fairly loudly in the background which distracts from the speech and I was amazed at how easy it was to achieve a much better result. You can play the before and after results in the mp3 files below.

BEFORE:

AFTER RX 6:


I imagine this module will be heavily used as there must be so many occasions where an interview takes place
with distracting background noise. Ambience Match is another valuable module for post-production work. Imagine if you have scenes of dialogue some of which have a background noise and other sections have no background ambient sound. In this case the background noise may actually be providing the atmosphere you need and you want it to be consistent across all the dialogue. Using Ambience Match you simply select some examples of this noise floor then click ‘learn’ and it will add this background to the entire file so that the result is consistent.

Another useful module is EQ Match which is helpful if you are putting together sections of dialogue which have perhaps been recorded with different types of microphones. This may result in undesirable voice sound quality changes for the different microphones. With EQ Match you can tell RX6 to ‘learn’ the EQ of one microphone selection and then you can apply this learnt EQ to the other microphone-recorded dialogue. You might have to adjust the ‘amount’ settings and again you could try these different settings through the ‘compare’ function until you have reached the most consistent overall sound quality.

Another very useful module is the Leveler which is equally suitable for both music or spoken applications. In some dialogue you might have too much variation in the overall volume meaning some of the speech may not be heard properly. I tried this module out by simply speaking and every now and again I went into a semi-whisper then applied the Leveler module and the overall audio was adjusted so that the sound level was constant. Please listen to the before and after examples below…

BEFORE:

AFTER RX 6:

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The Leveler also has many musical uses, instrumental or vocal, and the module includes settings specifically optimised for music. This is very useful if you have a singer with less than optimal microphone technique resulting in too much overall variation in audio levels. In normal circumstances you might have to apply complicated and time-consuming volume automation throughout the track to even the sound levels out. However the RX6 Leveler can make this procedure unnecessary and it also has built in ‘Ess Reduction’ and ‘Breath Control’ if you wish. Again you can use the ‘compare’ settings to adjust various settings and then listen to the result which is closest to what you desire.

Musical Modules
I’ve been discussing some modules which benefit post-production work but there are many, just like the Leveler, which are equally relevant to music or dialogue. Another very useful musical tool is De-Bleed which can remove an annoying click-track bleed which may have found its way onto an individual vocal track. This often happens when a singer likes the drums or click track to be prominent in their headphones and maybe prefers to have one headphone side slightly off the ear thereby exacerbating bleed just to annoy the engineer!

In operating De-Bleed you will need both the vocal track and the original click track to be loaded into RX6 and they both must be the same sample rate and also time aligned. Next you select the source of the bleed and click ‘Learn’ then adjust the reduction strength in RX6 to remove the click-track bleed. It is always best to make a copy of your original audio track and work on the copy just in case and this advice really applies to any audio editing work you do. In most cases RX6 will greatly improve on the original but you might end up overdoing something and need to start over from your original recording.

Breath Control is another invaluable module where you can very easily remove or reduce breaths in either sung or spoken audio. You can adjust the sensitivity, since removing all breath will sound artificial, and there is the option to output breaths only which can be very useful to detect what you might be removing. This breaths-only output is revealing and ensures you are removing only breath sounds and not some of the singing too. Once again use the ‘compare’ function to make several edits and then choose the one which achieves your desired outcome.

Other modules helpful within a music context include the De-Click, De-Clipping and De-Crackle, De-Hum and De-Essing modules. In addition the De-Plosive is a very useful way of removing unwanted plosives typically created when singing the letter ‘p’ but also maybe letters ‘b’, ‘t’ or ‘k’.

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In Conclusion
There are so many features available with iZotope RX6 that there is not enough time to discuss them all but you can download a full 30-day trial of the program. The company also offers various practice files for downloading so you can test out the ‘before’ and ‘after’ from your RX6 audio editing. Even though RX6 is a sophisticated and fully-featured application it is user-friendly in operation. Many of the presets may well fulfill most of your needs and the ‘compare’ feature is always very valuable in testing out a series of subtle adjustments to test how your audio will sound after processing. I strongly recommend that you download the free trial to test it out for yourself.