Audio Preamplifiers – III

Pre-amplification controls Almost all the controls to manage the signal to be pre-amplified are on the front of the hardware, whether it is Inboard or Outboard. The main controls on the microphone pre-amplifiers Inboard are:  Gain, Mic Gain, Mic Level, Gain, Input Gain, Input Level, Preamp Gain, Sens .... Various names can have the control … Continue reading Audio Preamplifiers – III

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Audio Preamplifiers – II

Below (Figure 1), a diagram of a hypothetical microphone pre-amplification circuit with the presence of additional controls as equalizer for high frequencies and equalizer for low frequency. Fig. 1 At the hardware level, basic, there are two types of analog microphone pre-amplifiers: Inboard Outbard Inboard Fig. 2 In figure 2 illustrates a generic scheme of … Continue reading Audio Preamplifiers – II

Audio Preamplifiers – I

The audio preamplifier as deduced from the word itself is a component used to amplify an audio signal before the final amplification. Pre-amplification and final amplification are two separate things not to be confused. The final amplification is the amplification of the signal with line level (0.770 v - 1.223 v) up to power values … Continue reading Audio Preamplifiers – I

Patchbay – II

Connections Below, an example of how they are connected the various instrumentations and how they are written the various notes on patchbay (fig.1) Fig. 1 (typical situation from the recording studio, as mpe.berklee.edu) n.b. Before starting to physically wrap any audio instrumentation and / or write the various notes on Patchbay strips, it is recommended … Continue reading Patchbay – II

Patchbay – I

The Patchbay sometimes also called Patch Panel in an audio environment, is an outboard component that is used for effecting routing, namely to deploy audio signals from and toward the inputs and outputs depending on requirements, it is presented as a rack (figure 1) this is to follow the dimensional standard generally used for outboard … Continue reading Patchbay – I

Splitters and Summings – IV

Sync and Word Clock Fig. 1 When we talk about digital audio we will see in more detail the importance of a correct and stable Word Clock, for the moment let's just understand its importance in connecting digital audio equipment. Each digital connection has a generally green LED (as seen in Figure 1, defined as … Continue reading Splitters and Summings – IV

Splitters and Summings – III

Notes on managing outputs in Stage Box - Digital Splitters Whether Audio Splitter or Passive Stage Box, Active or Digital, some optimal connection solutions as needed are: Connect the monitor outputs according to the given position, for configurations at groups of the Stage Box – Splitter. If Splitters are analog passive or active the only … Continue reading Splitters and Summings – III

Splitters and Summings – II

Active Analog Audio Splitter Unlike the passive ones, very often the Active Audio Splitters are separate modules that are not part of the Stage Box, they need external power supply to be able to operate as they have amplification circuits. They exclusively have XLR inputs and copies thereof always with balanced XLR output, because their … Continue reading Splitters and Summings – II

Splitters and Summings – I

Audio Splitter The Audio Splitter (fig. 1 and 2) is a useful tool when you need to divide an audio signal into multiple parts and also seen as a D.I. Box can be in some cases a Splitter. For example, in a live situation where you have the F.O.H (front of house mixer). (for mixing … Continue reading Splitters and Summings – I

Stage Box – III

Digital Interfaces As defined, Digital Audio Mixers and Digital Stage Boxes, but also as we will see any audio device that allows to accept and transmit to this type of protocols (such as power amplifiers, radio microphones and signal processors) to dialogue each other they need Interfaces that work in the same protocol, some already … Continue reading Stage Box – III