acoustic labs audio editor
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The following information will help you in getting started using the Acoustic Labs Audio Editor. The basic features of the Audio Editor such as opening an existing audio file, creating a new audio file, saving an audio file and playing back audio are discussed.

Topics
  • Opening Existing Audio Files
  • Audio Playback
  • Creating and Recording New Audio
  • Saving Audio as an Audio File
  • The Audio Levels Window
  • The Audio Quality Window
  • The Undo and Redo Features
  • Quick Keys and Shortcuts




  • Opening Existing Audio Files Audio Editor Open File

    To open an existing audio file using the Acoustic Labs Audio Editor simply select the "Open" button located on the top toolbar (visual aid item #5). Doing so will open the "Open File" dialog box as shown to the right. Select the audio file you wish to open using this dialog box and then click the "Open" button. This will immediately open the selected audio file, drawing the waveform which represents the audio file. From there you can easily playback or perform any of the various audio editing features available in the Acoustic Labs Audio Editor.

    An alternative way to open a file is by selecting the "Open..." option from the "File" pulldown menu (visual aid item #1). This will also display the "Open File" dialog box.



    Audio Playback

    To playback the audio associated with any audio file currently open in the Acoustic Labs Audio Editor simply click the "Play" button. This button is located on the lower toolbar see visual aid item #25. Immediately after pressing the "Play" button audio playback will begin at the current position that the tracking bar is located at. For more information on using the tracking bar please see Section 3.1: Navigating Within an Audio Waveform.

    Audio can also be played in loop mode. This will continually playback all audio after the tracking bar or, if the user has highlighted a section of audio, the highlighted section will continue to playback until the user presses the "Stop" button. To play audio in loop mode simply click the "Loop" button located on the lower toolbar see visual aid item #26.



    Creating and Recording New Audio

    Audio Editor New File To create a new audio file simply click the "New" button located on the top toolbar (visual aid item #4). This will display the "New File Audio Quality" dialog box as shown to the right. This allows you to specifically set the audio quality of the audio file you wish to create. By default, these settings are set to CD quality (i.e. a stereo, 16 bit resolution audio file sampled at 44,100 samples per second). You can change these values to any setting you wish in order to increase or decrease the audio quality. Keep in mind that increasing the audio quality will increase the audio file size and decreasing audio quality will decrease the audio file size. Once you have set your audio file quality to the desired settings simply click the "OK" button. This will immediately display a new audio file window with no audio data in it.

    Audio Editor Recording To record new audio to this newly created audio file (or any existing audio file) simply click the "Rec" button located on the lower toolbar (visual aid item #30). This will bring up the "Audio Recording" dialog box (as shown to the left) and audio recording will immediately begin. You'll notice on this dialog box that the "Record Time" is continually running. Use this to keep track of how much audio you have recorded. When you are done recording, simply press the "Stop" button. After doing so, the newly recorded audio waveform will be drawn within the audio file's window and you can now feel free to playback the newly recorded audio or apply any editing, tools or effects to the audio.



    Saving Audio as an Audio File Audio Editor Save As

    At anytime you can save your current audio file by clicking the "Save" option located on the top toolbar (visual aid item #6). If the audio file is newly created and has not yet been saved a "Save File" dialog box will appear as shown to the right. This will allow you to select a name, location and file format for saving the audio file. You can save the audio file in any of the supported formats. To choose which audio format you wish to save in simply select the format from the drop down selection box as shown on the right.

    If the current audio file is an existing file you can save any changes at any time by selecting the "Save" option. This will automatically save the current version of the audio file. If you wish to save the current audio file as a different file, as to not overwrite the original audio file, simply select the "Save As..." option from the "File" pulldown menu option (visual aid item #1). This will also display the "Save File" dialog box as shown to the right. Simply save the file to whichever location and format you wish.



    The Audio Levels Window Audio Editor Audio Levels

    The Audio Levels Window displays the left and right channel levels of the audio input and output. During playback the level of the audio being played is displayed. While recording, the audio level being recorded is displayed. You can also monitor input before recording by pressing the "Monitor Input" button. This is very useful to make sure you have a good level for the input signal before attempting to record.

    Keep in mind that it is very important to have an audio level that is strong, yet not too strong. If the audio signal is weak, only a small amount of green will be displayed. Recording with a weak signal will create a very quiet or silent recording. If the audio signal is too strong, the entire bar will be green. This will create clipping and distortion and will result in a poor sounding recording. At anytime you can toggle the display of the Audio Levels Window by selecting the "Audio Levels" option from the "View" pulldown menu (visual aid item #1).



    The Audio Quality Window Audio Editor Quality

    The Audio Quality Window displays the bit rate resolution and the sample frequency of the current audio file. At anytime you can toggle the display of the Audio Quality Window by selecting the "Audio Quality" option from the "View" pulldown menu (visual aid item #1). Changing the quality (resolution, frequency or channels) of an audio file can be easily done by selecting "Change Audio Quality" from the "Tools" pulldown menu option. This is explained in farther detail in Section 5.11: Change Audio Quality.



    The Undo/Redo Feature

    At anytime you can undo the previously performed operation by selecting "Undo" from the top toolbar (visual aid item #12). The undo operation can be applied as many as four times for any audio file. If at anytime you wish to redo the last undo operation you performed you can select the "Redo" option from the top toolbar (visual aid item #13). The undo and redo features are also available from the "Edit" pulldown menu (visual aid item #1).



    Quick Keys and Shortcuts

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