User manual SPL CHANNELONE

[. . . ] Manual Model 9945 Channel Strip Manual Version 1. 1 - 5/2000 R & D: Ruben Tilgner Channel One Model 9945 The information in this document has been carefully verified and is assumed to be correct. However Sound Performance Lab (SPL) reserves the right to modify the product described in this manual at any time. This document is the property of SPL and may not be copied or reproduced in any manner, in part or full without the authorisation of SPL. Limitations of Liability: In no event will SPL be liable for any damages, including loss of data, lost profits, cost of cover or other special, incidental, consequential or indirect damages arising from the use of the unit, however caused and on any theory of liability. This limitation will apply even if SPL or an authorised dealer has been advised of the possibility of such damage. Sound Performance Lab P. O. [. . . ] Accordingly the Channel One Compressor/Limiter regulates the level of large fluctuations faster than smaller ones; tones of longer duration are automatically processed with a longer attack time to prevent distortions. Even the control of the release time is dependent on the input signal. Fast and large level fluctuations are correspondingly processed with shorter time constants than minor fluctuations in order to limit the distortion of the audio signal as far as possible. Overall this technique provides the optimal solution between fast, unobtrusive control response and the least distortion of the audio signal. The result is a natural and transparent sound impression. A further technical specialty of the circuitry contributes to the high audio quality of the Compressor/Limiter in the Channel One: the Double-VCADrive®. Two That 2181 VCAs are utilized, one receives the in-phase, the other the out- of-phase signal. Subsequently the signal is passed through a differential amplifier. The effect of this circuitry is that distortion products and offset fluctuations are removed. The product of the differential of both signals (simply stated) means that possible interference is canceled out. The original information is however further amplified by 6 dB. In addition the VCAs provide relief to each other because they share their loads. They do not run the danger of operating in the saturation range ­ this would lead to offset noises, audible as clicks or pops. The Double-VCA-Drive® circuitry overall displays vastly improved distortion values so that a distinctly clearer and more transparent sound impression is achieved than with conventional circuitry. Voices and instruments are given a considerably more natural and dynamic timbre whereas "muffled" tones are not audible. The Compressor/Limiter characteristics are portrayed on page 24. info 14 Equalizer Operation On The On button inserts the Equalizer module into the signal path. Under normal circumstances the input signal comes from the compressor. With the Pre-comp button the Equalizer can be switched in before the Compressor/ Limiter so that the input signal is received from the De-Esser or Insert. Pre Comp. The Pre Comp. button reverses the sequence of Compressor/Limiter and Equalizer: When the button is pressed the Equalizer operates in front of the Compressor/Limiter; when not pressed the succession remains unchanged. This function permits very flexible operation with the Channel One when it is necessary to resolve recurring problems or to create special sounds. The following example describes when the Equalizer (EQ) is to be switched in front of the Compressor/Limiter. When over-accentuation of instruments or voices is registered within certain frequency ranges these ranges should first be reduced with the EQ. The signal can subsequently be compressed more easily. [. . . ] This limited warranty gives you specific legal rights, and you may also have other rights which vary from state to state, country to country. SPL electronics GmbH 41372 Niederkruechten, Germany 26 Copy Master 27 Manual Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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