How Do I Edit Audio?

Audio editing software is a powerful audio editing tool. Using it, users can edit audio in WAV, MP3, MP2, MPEG, OGG, AVI, g721, g723, g726, vox, ram, pcm, wma, cda and other formats Files are processed in various ways. General processing such as cutting, copying, pasting, multi-file merging, and mixing, etc. "Invert", "Mute", "Enlarge", "Amplify", "Fade", "Fade In", "Fade Out" , "Regularization" and other conventional processing; "Reverb", "Vibrato", "Delay" and other special effects; Support "Slot Band Filter", "Band Pass Filter", "High Pass Filter", "Low Pass Filter" "," High-frequency filter "," Low-pass filter "," FFT filter "filter processing.

Sound media is the most familiar way of transmitting information. People will be more or less exposed to sound media in daily work, life and study. Common audio equipment such as voice recorders and MP3 can handle simple recording and playback of sound. Operation. When you need to perform complex operations such as editing and synthesizing sounds, you usually leave the work to specialized equipment. This equipment is generally called an audio workstation. Its core device is a computer. Because it processes digital audio signals, it is also called For digital audio workstations. In fact, with the advancement of computer and multimedia technology and the continuous decline in hardware costs, an ordinary multimedia computer can now be used as an entry-level digital audio workstation.

In audio workstations, people use audio editing software to process digital sound. This is similar to using image software to process image files. It is a process of recording, organizing, and reprocessing sound data. The functions of audio editing software are now very powerful, covering almost all the functions of traditional recording studios. As long as the quality of the input audio materials is good enough, the finished products produced by the software can fully meet the requirements of professional recording production.

There are many audio editing software available at present, common and typical ones are: AdobeAudition, Sonar, Vegas, Samplitude, Nuendo, SoundForge, WaveCN, GoldWave, WaveLab, etc. These software can be divided into two categories: single-track and multi-track. SoundForge, WaveCN, GoldWave, and WaveLab belong to single-track audio editing software. They are mainly used for processing single audio files, such as adjusting the volume balance, sound noise reduction processing, and effect processing. You can even edit audio files directly. AdobeAudition, Sonar, Vegas, Samplitude, and Nuendo are multi-track audio editing software that can edit and merge multiple audio files into one audio file to create a variety of sound effects. Due to the large number of audio editing software, users who are unfamiliar with these software products will feel at a loss. Therefore, the following content attempts to briefly introduce the features and main functions of these software to help users choose software according to their own needs. ^[1]

Digital audio editing software is divided into digital audio production and music production. Music production is a software that uses multimedia computers to make music. It is one of the most popular computer music production and processing software today, and digital audio production is one of our most widely used software for recording radio programs.

The functions of digital audio production editing software mainly include recording, mixing, and post-effect processing, etc. It is a powerful digital audio editing software with audio processing as the core and integrating sound recording, playback, editing, processing and conversion. The rich effects and editing functions required for professional sound effects can be used to complete a variety of complex and delicate professional audio editing. In terms of sound processing, it includes many functions such as frequency equalization, effect processing, noise reduction, and tone adjustment.

1.Recording

When creating a new recording file, you must first set the channel, resolution, and sampling rate of the file. Generally, the channel is stereo,

There are more than 10 commonly used audio effects commands in the effects menu of audio editing software. From compression to delay to echo, each effect is the most widely used effect in daily audio applications. Mastering their use can make it more useful. It is convenient for us to operate in the aspects of multimedia production and sound synthesis, and obtain satisfactory results.

1.Echo effect

Echo, as the name suggests, means that after a certain period of time after the sound is heard, we return to be heard by us, just like shouting to the mountains in the wilderness, and it is widely used in many movie clips and dubbing. The method of producing the echo effect of the audio editing software is very simple. Select the echo command under the effects menu, enter the delay time, volume level and open the reverb check box in the pop-up dialog box. The larger the delay time value, the longer the sound duration, and the more the echo is repeated, the more obvious the effect is. The volume control refers to the volume of the returned sound. This value should not be too large, otherwise the echo effect will appear unreal. After turning on the reverb effect, it can make the sound sound more moist and more spatial, so it is recommended to select it generally.

Compression effect

In the recording of singing, the results are often not so satisfactory. The reason is largely due to the improper grasp of breath and strength when singing. Some sentences are pronounced too strongly and forcefully, which almost causes overload distortion. Some sentences are "speak softly" and cause weak signals. If you use compression effects on these recorded audio data, this situation will be greatly reduced. The compression effect uses the principle of "high pressing down and low lifting up" to play a balanced role in the strength of the sound. In the audio editing software, we can find this command in the expansion / compression of the effects menu. After selection, a dialog box as shown in Figure 6 pops up. The most important setting of the expansion / compression effect among its three parameters is the determination of the threshold. Its value is the critical point at which compression starts. The part higher than this value is compressed by the ratio (%). The smoothness indicates the degree of moisturization of the sound. The larger the value, the more natural the sound transition, but the more blurry it sounds; the smaller the value, the stiffer the sound, but the clearer the sound. Smoothness for best results.

3.Border effect

Using the flanger effect can add a unique "edge" to the sound based on the original sound, making it sound more interesting and changeable. Select the Flange command under the audio editing software effects menu to see the setting interface shown in Figure 7. Setting the effect of flanger The effect of flanger is mainly determined by the two parameters of depth and frequency. Try changing their different values to get many unexpected effects. If you want to increase the proportion of the effect, you can increase the mixing volume.

4. Change the pitch

Since audio files are analog signals, changing the pitch of an audio file is very laborious, and the effect of the change may not be ideal. GoldWave can reasonably improve this problem, and it can be easily achieved only by using the pitch change command provided by it. Select Pitch in the effects menu to enter the Pitch Change dialog box. The ratio indicates that the pitch changes to 0.5-2.0 times, which is a multiple setting method. The semitones are clear at a glance, indicating the number of semitones in which the pitch changes. We know that 12 semitones is an octave, so use +12 or -12 to increase or decrease an octave. The fine tone (Fine Tune) below it is a semitone fine-tuning method, with 100 units representing a semitone. Figure 8: Pitch change Sets the inherent properties of the audio format to tell us that generally the length of an audio file after a transposition also changes accordingly, but in audio editing software we can achieve the coveted "transposition does not change length" function. Just select the Keep Length check box in the dialog box, and you will find the original file length when playing again.

5.Equalizer

Equalization adjustment is also a very important processing method in audio editing. It can reasonably improve the frequency structure of audio files and achieve our ideal sound effect. Select Filter-Variable EQ (parameter equalizer) in the effects menu to open the 10-segment parametric equalizer dialog box of the audio editing software. Figure 9: The simplest and quickest way to adjust the 10-band parameter equalizer is to directly drag the digital logos representing different frequency bands to a specified size position. Note that the Gain of each segment of the sound must not be too large to avoid overload distortion.

6.Volume effect

The volume effect submenu of the audio editing software contains commands such as changing the volume of the selected part, fade-in and fade-out effects, volume maximization, volume envelope, etc. to meet our various volume change needs. The volume change command directly increases or decreases the volume in the form of a percentage, and its value should not be too large. If you don't want to overload, and you want to increase the volume within the maximum range, then it is recommended that you use the volume maximize command. It is one of the most convenient and practical commands provided by the audio editing software. Generally, the volume must be processed before the song is burned to the CD. Making fade-in and fade-in effects is also very easy. Just select the corresponding command and enter a starting (or ending) volume percentage. Just listen to the effect, and the volume change appears very natural. If you want to change the volume of audio events at different positions, you must use the volume envelope. After opening the envelope dialog box, use the mouse to directly add and adjust the volume point position, and finally press OK.

7, sound effects

Panning effect refers to controlling and changing the sound position of the left and right channels to achieve the purpose of panning. Of the panning effects of audio editing software, swapping channel positions and panning envelopes is most useful. Swapping the channel position is to exchange the data of the left and right channels. You only need to select Stereo-Swap under the effects menu to complete.