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manual abstract
The audio signal will be reduced in gain in proportion with the amount above the set threshold. 5 6 2.1.4 More about noise: Expanders and Noise-Gates A lot of instruments such as microphones, amplifiers, guitar pickups, etc generate some noise, either at low frequencies (hum) or at high frequencies (hiss) Such noise will inevitably interfere with the quality of your audio signal. Now, if you scream into a microphone you will not hear the noise generated by such microphone because such noise will be "masked" by the higher level of the signal, your voice in this case. But if you sing into your microphone more gently in a soft passage, the level of the signal generated by your voice will get much closer to the floor noise level and such floor noise will become disturbing. In order to kill this problem Expanders and noise-gates are used. An expander is the opposite of a compressor: attenuating the signal when the amplitude drops they can limit the floor noise. Now, we do not need dramatic expansion of a signal across the range, This would generate a resulting dynamic range of over 150dB. For this reason the amplitude control will be applied only to those audio signals which are below a set threshold. Those audio signals above the set threshold will not be affected. Noise-gate can be regarded as a simple Expander. But the Expander will attenuate the audio signal continuously below the set threshold while the noise-gate will simply dramatically cut-off the audio signal completely. 2.2 Voltage Controlled Amplifier (VCA) The VCA is the soul of the CLE 8.0 and it is one of the best components available today in his category thanks to its excellent performances in terms of distortion, linearity, noise and temperature stability 2.3 Inputs 2.3.1 Take it easy: Balanced Inputs To make your life easy and clean we have provided CLE 8.0 with electronically balanced inputs. Even if you operate at high signal levels, hum and noise will be reduce automatically. There is also a servo-function that will automatically adjust the internal level when unbalanced connectors are detected. The correction if of 6dB and it will avoid differences in level in between input and output signal. 3. CONTROLS The CLE 8.0 presents with 8 channels. Each channel is equipped with the same control elements: 6 push-button switches, 8 rotary controls and 22 LEDs except channel 1 which short of the LINK CH1 push-button only. Pic.1: Front Panel of The CLE8.0 3.1 Master Control Section 7 6 5 4 3 1 2 Pic.2: The Master Control Section 15 -6 30 25 20 -24 -18 -12 10 6 3 1 0 +6 +12 +18 GAIN REDUCTION(dB) IN/OUT LEVEL(dB) GAIN REDUCTION(dB) IN/OUT LEVEL(dB) 15 -6 30 25 20 -24 -18 -12 10 6 3 1 0 +6 +12 +18 LINK CH1 SC FILTER IN/OUT METER LINK ON SOFT INTPUT SC FILTER IN/OUT METER SOFT INPUT BYPASS/COMP COMP BYPASS/COMP COMP SMART SMART SMART SMART SMART SMART SMART SMART SMART SMART 1. Gain Reduction Meter It indicated the gain reduction. The range displayed is 1 to 30 dB. 2. Input / Output Level Meter It will read the actual Input or Output Level. The range goes from -24dB to +18dB. 3. Bypass Switch This switch simply turns off the correspondent channel. It can also be used to make an A/B comparison in between processed and unprocessed signal. 4. Input / Output Meter Switch When the switch is ON the level indicator will read the input level. When it is OFF the level indicator will read the output level. 5. SC Filter switch Engaging this switch to insert a Low-cut filter in the sidechain path and thus limits the influence of low frequencies on the CLE 8.0's control processes. 6. Smart switch Engaging this button to switch the "Hard Knee" characteristics to SKC (Smart Knee Control). SKC provides a compression of the program material and should therefore be used whenever compression should be more or less inaudible. 7. Link CH 1 switch Every channel contains the Link CH1 switch except the CH1. Activating this switch will link the corresponding channel to CH1, and the CH1 will take control of the corresponding channel. 3.2 Expander / Gate Section 10 8 1.5 1.2 7 2.5 0 45 OFF +15 EXP/GATE(dB) RATIO(1:N) 8 9 Pic.3: Expander/Gate Section 8. EXP/GATE control This control adjust the threshold level for the Expander / Gate Section in the range of Off to +15dBu. Signals below this level cause expansion. 9. Ratio Control This control determines the expansion ratio when the signal drops below the threshold level. The expansion ratio can be set from 1:1.2 to 1:8 (Low ratio for Expander application or 1:8 for Gate application). 10. Threshold LED The "+" Led lights up when an audio signal is below the set threshold. The "-" Led lights up in presence of an expansion 7 3.3 Compressor Section 12 150 6 1 7015 30 0.1 0.05 0.3 3 5 1.5 0.5 -10 +20-20 0 +10 COMPRESSOR(dB) RATIO(N:1) AUTOATTACK(mSec) RELEASE(dB/Sec) OUTPUT GAIN(dB) -30 -40 +10 +20 12 10 4 1 11 13 14 16 15 17 Pic.4: Compressor Section 11. Compressor Control This control adjusts the threshold level for the Compressor sect...