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Audio editing software or sound editor ( Eng. Digital audio editor ) – software for editing digital audio . Editors are adapted to work with music material .
The audio editor is used to record musical compositions, prepare phonograms for radio, television and Internet broadcasting, sound recording of films and computer games, restoration of old phonograms (pre-digitized), acoustic language analysis. The audio editor is professionally used by sound engineers.
Functions of the audio editor
The features of the audio editors may vary, depending on their destination. The simplest of them, often freely distributed, have limited ability to edit audio and the minimum number of supported audio formats. Professional packages can include Multi-track recording, professional sound cards support, video sync, advanced codecs, and a host of plug-ins, both internal and external.
Sound signal display
Sound data is represented graphically in the form of a sequence of readings, which are combined by one bypass, corresponding to the amplitude of the sound signal, called the signal signal (or wave form). A program window with a graphic image of such a signal is called a track or audio track. Usually editors allow you to change the scale of the display of the track, with the ability to change both the temporary resolution (horizontal axis) and the resolution of the amplitude of the sound (vertical axis). The most advanced editors allow you to view and modify data with an accuracy of one count. It is also possible to present a sound track in the form of a spectrograph. In this case, the vertical axis sets the signal frequency in Hertz, and the signal amplitude is displayed in intensity or color. A similar representation of the signal is convenient for determining the failure in the frequency range, for example, to detect the effects of file compression.
Recording and playback
The first audio editor supported the recording, editing and playback of only one stereo track, that included two mono-tracks with signals from the left and right channels of the phonogram. But the development of PC capabilities allowed simultaneous recording from multiple inputs of multichannel sound card simultaneously.Such editors are called multi-track. In the next playback in such an editor, it is possible to make a series of several audio tracks in one mono or in the tracks, or to create a multichannel phonogram, for example, in order to prepare the accompaniment to a movie with surround sound. One of the functions can be the preparation and recording of CDs, DVD-Audio.
Mainly in the audio editor, recording is performed without audio compression, to maintain maximum sound quality. However, there are programs that allow you to record with compression on the fly, to save space or eliminate unnecessary operations.
In addition to the possibility of recording from external sources, as a rule, the audio editor has a built-in generator of simplest tones, different types of noise (such as white and other color noise) and silence.
The main purpose of the audio editor is to convert the audio signal. Most types of sound transitions came from the era of analogue sound recording, but some of them became possible only with the use of a digital representation of audio data.
The most common are:
- amplitude transformation
- change the dynamic range
- effects based on sound delay
- echo effect
- sound signal filtering
- graphic and parametric equalizers
- restoration of the sound signal
- noise reduction
- suppression of clicks in records from the plates
- restore “clips” signal
- Changing the height of the tone and / or the duration of the sound
- ringing of a fragment
As a rule, the function of the audio editor can be expanded, thanks to the use of plug-ins. They can contain one or more effects and surpass the processing quality or the number of customizable built-in processing tools.
Various tools can be used to analyze the sound:
- Spectrum Analyzer
- Sound level meter
- Phase indicator
Using MIDI technology
Some audio editors can be used in conjunction with synthesizers that support the MIDI interface for creating and editing sound samples. With the MIDI interface, samples of sounds can move from the synthesizer to the audio editor and back. It is also possible to include sound playback in the editor of the command, which is sent through the MIDI interface.