acoustic labs multitrack plus
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This section describes the Audio Editor Interface in detail. The Audio Editor Interface can be used to perform precise editing on Extended Audio Snippets that exist in the Track View Interface, Audio Loops that exist in the Loop Bank Interface and independent audio that has either been imported or recorded by the Audio Editor.

Topics
  • Importing and Exporting Files
  • Using the Tracking Bar
  • Playing Audio
  • Recording New Audio
  • Highlighting a Waveform Section
  • Zooming In/Out of the Waveform
  • Using Markers
  • The Audio Editor Tool
  • Quick Keys and Shortcuts




  • Importing and Exporting Files

    Independent audio files can be imported into the Audio Editor Interface by selecting the "Import Audio File to Editor" option located within the "File" pulldown menu (visual aid item #1). After selecting this option the "Open File" dialog control will appear. From there you can easily select the audio file you wish to import into the Audio Editor Interface.

    At anytime you can easily export the current audio loaded into the Audio Editor Interface by selecting the "Export Current Audio as Audio File" option from the "File" pulldown menu (visual aid item #1). After selecting this option the "Save File" dialog control will appear where you can choose the filename and audio file format you wish to save as. The Acoustic Labs Multitrack Plus is capable of saving audio in Wave or MP3 format.



    Using the Tracking Bar Multitrack Plus Audio Editor Tracker

    The tracking bar is a useful tool for navigating to different areas of the waveform. As shown in the visual aid to the right, you can change the position of the tracking bar by simply clicking the left button of the mouse on any area of the waveform. The tracking bar position is also the current position that playback will begin at when playing audio that is in the Audio Editor. The current position of the tracking bar is always displayed as the "Start" time on the lower toolbar (visual aid item #12). This allows the user to easily navigate throughout the audio data by simply using the tracking bar - left clicking on whatever part of the waveform you wish to have audio playback begin at.



    Playing Audio

    To playback any audio loaded into the Audio Editor Interface simply press the "Play" button (visual aid item #15) located on the bottom toolbar. Audio playback will begin where the current position of the tracking bar is set. Positioning the tracking bar is discussed in detail in the above topic labeled Using the Tracking Bar. To playback audio in a looping mode press the "Loop" button (visual aid item #16) located on the bottom toolbar.



    Recording New Audio

    Multitrack Plus Audio Editor Recording To record new audio into the Audio Editor Interface press the "Rec" button located on the lower toolbar (visual aid item #20). This will create the record audio dialog box as shown to the right. The drop down select box allows you to select which audio input device you wish to record from. Below the drop down select box you are able to choose from recording in stereo or mono. Once you're ready to record simply press the "Start" button and the recording process will begin. You'll notice the "Recorded Audio" timer will keep track of the amount of audio that has been recorded. When you're finished recording press "Stop" and you're newly recorded audio will be instantly loaded into the Audio Editor Interface.



    Highlighting a Waveform Section

    Multitrack Plus Audio Editor Highlighting When editing or zooming in on particular sections of audio, the ability to highlight or select sections of the waveform is very helpful. To select a section of audio, click the left mouse button down while the mouse arrow is over the waveform and hold the button down while dragging the mouse. As soon as you start to drag the mouse you'll see a section of the audio become highlighted. When you're done selecting the desired section, release the left mouse button. The section of audio will remain highlighted. You can now zoom in on that section of audio or perform specific editing functions as described in Section 7, Section 8 and Section 9 of this Manual.

    The included images show an example of selecting audio. Notice that in the first image, when the left mouse button is initially pressed the tracking bar is set and the "Start" time is set to this position (00:00.266). Also notice that in the second image as the waveform is highlighted the "End" and "Total Length" values are updated. Whenever a section of audio is highlighted the "Start" time value will contain the starting position of the highlighted section, the "End" time value will contain the ending position of the highlighted section and the "Total Length" value will contain the length of the highlighted section. When no section of the waveform is highlighted and only the tracking bar exists the "Start" and "End" values will both contain the position of the tracking bar and the "Total Length" value will contain the entire length of the audio data.



    Zooming In/Out of the Waveform

    To view and edit very specific parts of the waveform the zoom feature can be used. The zoom in and zoom out buttons are located in the lower right hand corner of the Audio Editor Interface frame (visual aid items #22, #23 and #24). After selecting a section of audio, use the "+" button to zoom in (magnify) the specific section of audio. If you would like to view more of the waveform, click the "-" button. To view the entire waveform, click the blank button.

    Note that you can also use the scroll wheel of your mouse to zoom in and out. Using "Ctrl +" and "Ctrl -" on the keyboard is also a shortcut to zooming. The zoom feature is very powerful, if you wish, you can zoom down to a single sample - a fraction of a millisecond.



    Using Markers

    Multitrack Plus Audio Editor Markers

    Markers can be very useful when you need to select a very precise section of audio. Two markers can be set - a begin marker and an end marker. To set a marker, place the tracking bar where you would like the marker to be placed and then either select the "Markers" pulldown menu or right click on the audio waveform. This will bring up a popup menu with options for setting a begin or end marker as shown in the image to the right.

    After a begin or end marker has been set it will always appear when the track waveform is displayed.     Visual aid items #9 and #10 show the begin and ending markers set for the track. To erase begin or end markers simply select one of the "Erase" options from the popup menu shown in the image. Once you've set marker positions, you can use them to perform editing on the audio section within the markers.



    The Audio Editor Tool

    Multitrack Plus Audio Editor Tool The Audio Editor Tool can be very useful when editing audio data in the Audio Editor Interface. Selecting "Audio Editor Tool" from the "View" pulldown menu will open the Audio Editor Tool dialog box as shown in the image to the right. The edit box at the top of the dialog box displays information about the audio currently loaded into the Audio Editor. The checkbox to the right of the edit box selects whether or not editing and playback of an Extended Audio Snippet should be performed using project values. This means that if the tempo of the project differs from that of the audio snippet, the display and playback of the audio snippet will be done with respect to the project's tempo. Also, if there are any realtime audio effects applied to the track that the Extended Audio Snippet belongs to, they will be applied upon playback.

    The remainder of the controls in the Audio Editor Tool dialog box display various time settings. These include the total length of the audio data, the tracking bar start and end times as well as marker start and end times. The start and end times of where the audio data resides in the project are also displayed.



    Quick Keys and Shortcuts

    The following keyboard shortcuts can be used to perform the stated action: