In the process of professional sound engineering construction for clients, we always encounter various difficulties. Therefore, the editor has summarized some common problems and introduced them to everyone. The following are the specific contents:
1. Signal allocation issues
In professional audio engineering projects with several sets of speakers, the signal is generally distributed to multiple amplifiers and speakers through a single equalizer. But at the same time, it also leads to the mixed use of various brand models of amplifiers and speakers, which may cause various problems in signal distribution, such as whether the impedance matches, whether the level distribution is average, whether the power obtained by each group of speakers meets the standard, etc. Additionally, it is difficult to adjust the frequency characteristics of the sound field and speakers with a single equalizer.
2. Debugging issues with the graphic equalizer
Common graphic equalizers can have three types of spectral wave shapes: swallow shaped, mountain peak shaped, and wave shaped. The above spectral wave shapes are artificially imagined by professional sound engineers, but they are not actually the spectral wave shapes required for actual sound engineering sites. As is well known, the ideal spectral wave shape curve is relatively stable and flat. If the spectral wave shape curve is artificially adjusted through imagination, it can be imagined, The ultimate effect is often counterproductive.
3. Pressure limiter adjustment issue
In professional audio engineering, the common problem with adjusting the pressure limiter is that the pressure limiter does not work at all or excessive action can lead to a reaction. The former can still be used after problems occur, while the latter can seriously affect the operation of the sound engineering system. The specific performance is usually manifested as the stronger the accompaniment sound, the weaker the human voice, and the performer is at a loss.
4. System level adjustment issues
Firstly, the sensitivity control knob of the power amplifier was not in place, and secondly, the audio system did not perform zero level adjustment. In some cases, when the Mixing console channel pushes upward slightly, the sound output will increase a lot, which will affect the normal operation and fidelity of the audio system.
5. Bass signal processing
The first type of problem is to directly use the full frequency signal to drive the speaker of the power amplifier without electronic frequency division; The second type of problem is not knowing where to obtain the bass signal from the system for processing. If you do not perform electronic frequency division and directly use a full frequency signal to push the speaker to the power amplifier, although the speaker can emit sound without damaging the speaker unit, it can be imagined that the low unit can emit full frequency sound alone; But if the bass signal is obtained from an inappropriate position in the system, it can also bring unnecessary trouble to the sound engineer's on-site operation.
6. Effect loop processing
The post signal of the pusher should be taken to avoid the microphone howling scene caused by the effect being out of control. If conditions permit, one channel can be occupied when returning, making it easier to adjust.
7. Line connection processing
In professional audio engineering, the common issue of high communication interference in audio systems is due to inadequate wiring connections. There are also balanced to unbalanced and unbalanced to balanced connections in the system, which must comply with regulatory standards when used. In addition, it is prohibited to use inferior connectors in professional audio engineering.
8. Control issues
The console is the control center of the audio system, and sometimes a significant increase or decrease in EQ balance between high, medium, and low on the console indicates that the audio system is not set correctly and should be re debugged. Excessive adjustment of the EQ on the console is prohibited.
