Behringer T1952 User Manual download pdf (Page 20)

3.1.3 The TUBECOMPOSER in digital recording and sampling

In an analogue recording, too low recording levels lead to an increased noise level, whereas too high levels will

cause a compressed and squashed sound. In extreme cases, it will cause distortion due to tape saturation.

In contrast to analogue, side effects in the digital field always become extremely audible: with decreasing level,

a tape previously recorded with insufficient level loses resolution: the recording sounds hard and loses atmo-

sphere. With excessive level, the recording sounds harsh and heavily distorted. In order to avoid these effects,

the Peak Limiter section of the TUBECOMPOSER should be placed before for example a sampler. As a result

of this process, a digital recording or a sampling event can be optimally set in level without any problem.

3.1.4 Noise reduction on effects paths

The effects rack is one of the main overlooked sources of noise in a PA system or recording facility. The price

of reverb and delay units and harmonizers has fallen drastically over the last number of years, which have made

these units a common feature in small studios and home recording installations. However, multiple effects

units considerably increase the overall noise level, so that the pleasure in acquiring a new sound effect is short

lived.

It will prove useful to use the BEHRINGER TUBECOMPOSER as the last component in the chain of effects

units and use the noise reduction function of the Expander/Gate section. We recommend that you use a slow

release time in order to maintain the natural reverb.

3.2 The TUBECOMPOSER live

3.2.1 Reducing leakage in stage mics

The TUBECOMPOSER has many uses in live-work, on stage and in multi-miking situations: a well set up

expander/gate can effectively suppress background noise, compressor type pumping noise and microphone

leakage etc. without producing any undesirable side effects. Expander/gates are commonly used for process-

ing vocals. When specifically used with a compressor, the distance and position of the mic in relation to the

singer is very critical: the further the distance, the more sensitive the mic is to background noise. Use the

Expander/Gate section in the slow release mode to inaudibly eliminate background noise, that occurs in

pauses between singing. When used in live situations, leakage of miked instrumentation is substantially

reduced, as well as other acoustic contaminants in various recording situations.

3.2.2 Reducing feedback in stage mics

When a singer is using a vocal mic, their voice effectively stops other sounds from entering the mic. But in

pauses between the singing, the mic will pick up noise from the house PA and monitors, which can lead to

unpleasant feedback problems. If the TUBECOMPOSER is inserted into the mic channel, it will shut off the

channel when it is not being used, reducing the possibility of feedback. Principally all mics should be included

in this application.

3.2.3 The TUBE COMPOSER as a protective device

Sound system distortion is usually a result of amplifiers and loudspeakers being driven beyond their limita-

tions, whereby signals are hard limited by so-called clipping of the amplifiers. The signal peaks are thereby

clipped because the maximum output voltage is reached, which leads to unpleasant and for loudspeakers

dangerous distortions.

Apart from the danger of long term overload a loudspeaker can also be damaged by an occasional high level

overload, e.g. the sound of a microphone falling onto a hard floor. In order to protect a system or the loudspeak-

ers, the application of the BEHRINGER TUBE COMPOSER is recommended. Conventional limiters must

restrict the maximum output level far below the clip-point of the amplifier, in order to limit the height and

duration of overloading transients. This has the disadvantage that the power reserve of the system cannot be

fully exploited.

Protection of a system with a passive crossover

If your sound system incorporates a passive crossover network (included in the loudspeaker case), insert the

BEHRINGER TUBE COMPOSER between your mixing console output and the power amplifier input. It is used

3. APPLICATIONS

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Behringer T1952 User Manual Page 20

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