Henan Puyang professional wedding delay audio equipment equipment company generally works delay system box. In the digital delay, the audio signal is first encoded by the low pass filter circuit into the A / B converter shown in Figure 5. Audio signals undergo sampling pulse signal amplitude, amplitude intervals formation composed of a pulse signal amplitude envelope. The transformation into a sampled analog signal, through the information storing buffer memory backup, and then into the shift register, to obtain the desired amount of delay. After the delay in obtaining, by the decoder to decode the signal, D / A converted into an analog audio signal recovery. Before output, but also through low pass filter to remove mixed audio signal modulated noise. Since all digital reasons delay is a very good signal to noise ratio, SNR S / N = 20Log2n, where n is the number of bits. From the above equation, adding a bit of each, can improve the signal to noise ratio 6dB, ie 10bit to 60 dB, 16it is 96 dB. Has been developed to 18bit, its dynamic indicators can be imagined. Jiaming Yang 1393 +90664 +17 69139139 www.69139139.com Zheng * City Milan sun technology market, Building 5, Unit 2, 208 Sound Equipment Henan Puyang wedding Monopoly 2, reverb reverb types and works can be divided into four types: ①-plate reverb, ② foil-type reverb, ③ spring reverb, ④ digital reverb. These types of reverb different working principle, but the role of the recording process is substantially the same. (1) digital reverb digital reverb works calculus theory, early in sixty generations has been established. Due to hardware reasons, until the eighties gradually make the digital reverb in technical indicators, performance, degree of automation has made substantial progress. Digital reverb works. It is fully digital signal processing methods, sampling along with insertion cycles delayed memory, each sample is multiplied by the delay on behalf of the magnitude of the reflection coefficient of the sound, the reflected sound reverberation get together, and then sent back to memory, with two exponential multiplier for multiplication. Lake Scone (LEXICON) digital reverb, has broken the previous digital reverb "pre-delay analog reverb decay time average attenuation adjustable" This model, which emulate the characteristics of natural reverb to imitate the new digital technology , no rendering, but the sound can be changed. Real room reverberation, the sound is not the motivation for some time after the first space on the delay before entering the large density reverberation, but gradual, non-proliferation rules. It is a pre-delay time 480L According to this theory, the design of a combination of very irregular diffusion, the delay depending on the size of the room shape, the shape of the reverberation set proliferation, from changes in intensity and shape of the comparison, The length of the reverb to reflect and pursuit of natural sound field. Visible digital reverb research has entered a deeper level. Henan Puyang wedding equipment in specialized audio equipment (2) digital reverb function Jiaming Yang 1393 +90664 +17 69139139 www.69139139.com Zheng * City Milan sun technology market, Building 5, Unit 2, 208 on the digital reverb in terms of functionality, much better than other types of reverberation system. Digital reverb can single input signal, the information processing is divided into four audio signal output can also be divided into two pairs of two-channel, stereo output, or four-channel output. Henan Puyang wedding equipment in specialized audio equipment if only when the delay is used, it can simultaneously send different in the amount of delay. In the digital screen display can be easily read level, work status, time, data, waveform response and so on. SPIDERS way in a more diversified. Scone reverb on the Lake, the main road on the backplane in addition to two inputs and four outputs, there are three-way MIDI interface, digital recording interface, computer interface, and a two-way remote control interface. On the front panel also has a program storage boxes, disks hired, take away are convenient. Jiaming Yang 1393 +90664 +17 69139139 www.69139139.com Zheng * City Milan sun technology market, Building 5, Unit 2, 208 Henan Puyang wedding equipment in specialized audio equipment