The delay effect is a kind of effect. It mainly creates the reflected sound effect with a time interval greater than 50ms, that is, the echo effect in various environments. Changing the reflected sound spectrum is equivalent to changing the reflection environment. Changing the delay time interval is equal to changing the size of the reflection space. It plays an important role in the creation of film and television sounds and is a commonly used device for sound engineers.
The effects of delay effect creation can be divided into two categories, one is the long delay effect, and the other is the short delay effect.
There are seven main types of long delay effects:
(1) SLAPECHO (slap echo) effect: It is characterized by short and powerful echo, retaining a small amount of high-frequency components, and many low-frequency components, reflecting the reflection of hard surfaces. It is suitable for percussion processing. The processed sound is thick, full, crisp and translucent.
(2) AMBIENTECHO (Environmental Echo) effect: It is characterized by a strong environmental color, soft natural sound, short delay time, and a small proportion (10%). It is suitable for plucking and playing music, and the processed sound is melodious and intriguing.
(3) MULTI-ECHO (multiple echo) effect: It is characterized by a large number of echo levels, a long delay time, and a large proportion (20%). Suitable for sound creation and processing in close-ups of film and television screens.
(4) STATICDOUBLING (static double sound) effect: It is characterized by two voices, also called chrome, the sound is soft and full. Suitable for the creation of a duo, you can create a solo of instrumental music as a duo of instrumental music.
(5) DYNAMICDOUBLING (dynamic double sound) effect: The feature is to add dynamic on the basis of static double sound, suitable for the creation of duet, and create a duet of vocal music. For example, male solo can form a male duet through this effect processing, and can also be used to create a female solo duet.
(6) LONGECHO (long echo) effect: It is characterized by the length of the delay can fully reflect the size of the space. It is suitable for the expansion of the space outside the film and television, and the size of the space that is difficult to express on the screen can be expressed through sound.
(7) PITCHBENDING effect: It is characterized by making the pitch naturally change up and down, using the physical Doppler effect to make the electronic music produce a variation effect, which is suitable for new electronic music creation.
Different long delay effects occur due to different delay parameters such as delay time, delay sound polarity, feedback amount, mixing ratio, feedback polarity, modulation depth, modulation speed, scan size, and the like.
There are three short delay effects:
(1) FLANGE effect: This is a kind of effect sound full of fantasy colors, different sound sources, different fantasy colors. Depending on the visual environment, different sound sources are used with different FLANGE effects. This effect sound is produced by having a sound signal through a comb filter. Its voice is bizarre, sometimes like a sound in a cave, sometimes like a sound in a fountain, and there is a vague conversation in the middle. The sound is strange and full of fantasy, suitable for playing in a fantasy environment.
(2) Simple reverb effect: adjust the delay time to less than 50ms, then the reverberation effect is formed, and the original layering becomes a sense of continuity.
(3) REINFORCEMENT effect: This is used to eliminate the effect of sound overlap. When the sound is amplified in a wide square, the sound is superimposed due to the spatial distribution of the main sound reinforcement speaker and the sound reinforcement speaker, and the sound is unclear. Therefore, the delay effector is serially connected to the auxiliary sound reinforcement channel, so that the main sound reinforcement speaker and the auxiliary sound reinforcement speaker have a certain delay in the sound generation to propagate through the space, and the sound of the listener's ear is substantially simultaneously, thereby eliminating the sound. The phenomenon of overlap.
Of course there are other short delay effects, such as resonant chord effects and rotating speaker effects.
What is the operation of the delay effect machine?
Usually, the delay effect machine has only one operation mode, that is, the parameter mode, which is adjusted on the panel of the delay effect machine according to the various effect parameter values ​​provided in the instruction manual, and such an effect will appear. The delay effect machine operates less than the reverb effect machine.
What is the working principle of the delay effect machine?
The sound signal passes through a high-pass circuit of 12dB/octave, filtering out frequency components above 10KHZ, mimicking the loss of high-frequency components in the reflected sound, and blurring the reflected sound. The adder is used to generate the echo string, and the digital delay circuit is used to adjust the size of the reflection space. On the one hand, it is fed into the mixer and the direct sound is mixed, on the other hand, the negative feedback branch is introduced, and the echo level is changed by the feedback amount adjustment and the level change. . The high-same circuit on the feedback branch can filter out the frequency components above 6KHZ with a slope of 6dB/octave.

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