【 Weak current College 】 professional effects using skills---Power By 【 China power house network 】

Effects is to provide a variety of sound field effect of audio peripheral equipment. The original is mainly used for recording and movie sound effects produced, are now widely used on-site sound reinforcement systems. No matter how the effects of quality excellent, if you are unable to control their adjustment skills, not only unable to obtain the desired sound effect, and will destroy the whole system sound. Effects of the basic effect type sound field effects, special effects and sound source effect three categories. Digital effects generally store have dozens or hundreds of effect type, effects and parameters balanced, noise gate, actuator and compression/limiting the capability. Users can choose according to their own need to select the appropriate effect type. 1. the composition of the indoor sound effects: direct sound: Direction audience directly from the sound source to broadcast over the sound. Sound pressure level of attenuation and inversely proportional to the square of the distance. The distance the doubling of the sound pressure level decreases 6dB. And sound absorption characteristics of the room. Near-time reflections (early reflections) Eary Refections peripheral interface once or twice. After reaching the audience at the reflection of sound. Near-time reflections and direct access to the sound of the time delay for hearing people 30ms, cannot be distinguished from noise or near-time reflections, can only be superimposed with feelings, near time reflections on improving sound and clarity, and with the sound absorption characteristics of reflection interface. Late reflection sound (noise) ratio of direct sound late than 30ms of reflection reflections claiming to be late (mixed sound), the mixed sound to help people identify characteristics of closed space of the room (room the size of the volume). The music program is to increase the richness of the music, it provides sweetly components at the same time and near-time reflection sound effects with masking, voice clarity and intelligibility of language. Therefore, this component is not, and should not be too large. The size of the mixed sound and sound absorption characteristics of peripheral interface, often mixing time RT. The reverberation time is Reverberation Time to reach steady state sound source, stop talking, indoor sound pressure level attenuation 60dB. Sound field effect sound field effect mainly to imitate in different volume, shape and sound-absorbing conditions room propagation of sound effects. Sound field effect parameter mainly: reverberation time RT, delay time, sound diffusion and reflections of the density of a parameter. (1) the adjustment of the reverberation time. Length of reverberation time, room size effect of listening. Effects of reverberation time according to the following factors to determine the volume and sound-absorbing enough room, the effects of artificial reverberation time to short. Male vocal, the reverberation time should be shorter; girl singing the reverberation time may be longer. Professional singer reverberation time should be shorter, otherwise it will damage the original characteristics of timbre; amateur singers available long reverberation time, to cover up the sound. Environmental noise big occasions the reverberation time can be extended. Sound volume is large, the reverberation time adjustable have shorter. (2) pre delay (Pre Delay) adjustment: pre delay is to control the effect with echo (Echo) intervals. ECHO is the same sound has reached the time difference is more than 50Ms. Pre Delay is mainly used to improve the performance of the vibrato effect. General singing vibrato frequency range (sound fluctuation interval time) in 0.1 sec ~ 0.2 seconds. Pre Delay than 0.1 seconds delay unit becomes a reverberator, you can simulate the effect of early reflections to make sound thickening and increased. (3) the echo effect of feedback rate (Feed back): this parameter controls the number of ECHO is available from 0% ~ 99% adjustment. Rate the most hours, feedback effects actually is a delay, maximum is formed of endless echoes, the General increase in about 30%. 3. special effects: (1) Plate metal plate. Simulation-Plate reverb for sound effects. It features a bright, bright and crisp sound, giving a vibrant feel. Generally used to deal with percussion and playing music. (2) Phasing phase shifter effect. The delay after the voice and no delay in sound mixing together, because the two sounds with the time difference (phase), selected and will be adding in some frequency peaks on the form points, while other frequency offset forming Valley, forming the "comb filter" frequency characteristics, through the adjustment of the delay parameter to control the comb filter effects of characteristics of peaks and valleys where adjustment direct signal delay signals proportional adjustable comb filter characteristic peaks and valleys of the difference. When a child is between the ratio of 1: 1, the difference between peak and Valley up to the maximum, 6dB. Transfer the amount of delay time is not far, in regulation between 1ms ~ 20ms. (3) Flange plating (flange) effect. On delay time modulation (delay changes on a regular basis) arising from the effect. This effect can be iterative to exaggerate the voices of harmonic or even harmonics, the sound spectrum of cyclical changes in the structure. Thus appears "empty sound," and "Jet sound" and "alternating sound illusion" rich colors of sound effects. Flange effect of parameters have a frequency, modulation depth and feedback ratio. Mainly used for special occasions the sound processing, use with caution. Sound source effect: on various sound sources of sound processing. There are specialized for the human voice, percussion and other specific sound source manufacturing effects. 5. effects of connection method: effects of connection principles are only microphone sound signals (vocal and instrumental), because these sounds through the microphone picking up after any processing after the tone may not be ideal to have a makeover. But for standard music source (e.g. CD) must not be combined with the effects, because the program source has the best tuning results. In actual use, effects, there are two connection methods: (1) Insert method using a mixer of INS (insert), insert the results into the system. Add-in method: direct effect is plugged into the mixer with microphone channel INS or microphone sound grouped after effects into the microphone of the Group channel. This next methodUsing effects MIX mixed function to adjust the ratio of the effect sound (dry-wet). The plugs to INSO three cores, Tip (head-end) and end-to-signal output (Send) end, received the input of effects; Ring (ring) and end (public) for signal input (Return) end, effects and output-side. (2) input and output method from the mixer's Aux Out (secondary output) end sent microphone signal to the input-side effects, effect the output signal to the input of a sound mixer. Use the microphone channel push a mixer and amplifier input direct sound respectively adjustment potentiometers and the ratio of the effect sound effects MIX over the maximum (or WET) location. Input method has a single input single output, single-output and input double-double output three connection to double the output of the effect sound obvious sense of space and, therefore, to best use the most. Delay: Delay: 3-35ms produces "comb filter" effect is Flange effect 35-50ms produces more than 50ms Chorus chorus effect creates an echo effect on Echoes audio source signal low frequency modulated (AM, FM) can handle a vibrato effect. Reverberation time: 0. 5 seconds too few: the sound of dry and thin 1. 9 seconds applicable languages: high definition, sound and clean, but music does not apply to full 1.2 seconds: the sound of music, full of warm fullness, ambitious, with a sense of space and concentration, vivid and bright 2 seconds too much: the sound of turbidity, ECHO, buzzing and remote sensing to sense and sound pressure level of the relationship between the volume of hours: sound weak, thin, dynamic, bass, treble insufficient volume is acceptable: sound natural, clear, soft, plump Park Yun-volume is too large: sounds a powerful, dynamic fullness, but not soft sound of the multifunctional hard SONY effects processor: the need for low-cost multifunction effects processor, 4 channel structure for multiple signal input provides a more flexible way, these include: 2-channel input into a 4-channel output, respectively 2 road into 2-channel output (× 2) as a stand-alone real stereo processing, or 4-way mono input to 4-way mono or stereo output 2; operation of the dial-up operation, you can choose to 45 different effect mode; integrated large-capacity storage memory, the world famous audio engineers in the design and development of 200 program results are stored in memory, and also provide 200 by your own settings and store the results of program memory. Search feature helps you locate specific types of programs that have been stored (TAP) set dianchu parameter is available enter easy adjustment of the selected parameters, allowing unprecedented DSP-V55M operation is simple and convenient.