Rupert Neve Designs Shelford 5051 Скачать руководство пользователя страница 6

considered above our hearing range had a measurable effect on listener’s 
electroencephalo-grams. Kunchur describes several demonstrations that have shown 
that our hearing is capable of approximately twice the timing resolution than a limit 
of 20 kHz might imply
(F=1/T or T=1/F). His peer reviewed papers demonstrated that we can hear timing 
resolution at approximately with 5 microsecond resolution (20 kHz implies a 9 
microsecond temporal resolution, while a CD at 44.1k sample rate has a best-case 
temporal resolution of 23 microseconds).

It is also well understood that we can perceive steady tones even when buried under 
20 to 30 dB of noise. And we know that most gain stages exhibit rising distortion at 
higher frequencies, including more IM distortion. One common IM test is to mix 19 
kHz and 20 kHz sine waves, send them through a device and then measure how 
much 1 kHz is generated (20-19=1). All this hints at the importance of maintaining 
a sufficient bandwidth with minimal phase shift, while at the same time  minimizing 
high frequency artifacts and distortions. All of the above and our experience listening 
and designing suggest that there are many subtle aspects to hearing that are beyond 
the realm of simple traditional measurement characterizations.

The way in which an analog amplifier handles very small signals is as important 
as the way it behaves at high levels. For low distortion, an analog amplifier must 
have a linear transfer characteristic, in other words, the output signal must be an 
exact replica of the input signal, differing only in magnitude. The magnitude can be 
controlled by a gain control or fader (consisting of a high quality variable resistor 
that, by definition, has a linear transfer characteristic.) A dynamics controller - i.e. 
a compressor, limiter or expander - is a gain control that can adjust gain of the 
amplifier very rapidly in response to the fluctuating audio signal, ideally without 
introducing significant distortion, i.e. it must have a linear transfer characteristic. But, 
by definition, rapidly changing gain means that a signal “starting out” to be linear 
and, therefore without distortion, gets changed on the way to produce a different 
amplitude.

Inevitably our data bank of “natural” sound is built up on the basis of our personal 
experience and this must surely emphasize the importance of listening to “natural” 
sound, and high quality musical instruments within acoustic environments that 
is subjectively pleasing so as to develop keen awareness that will contribute to a 
reliable data bank. Humans who have not experienced enough “natural” sound 
may well have a flawed data bank! Quality recording equipment should be capable 
of retaining “natural” sound and this is indeed the traditional measuring stick. And 
“creative” musical equipment should provide the tools to manipulate the sound 
to enhance the emotional appeal of the music without destroying it. Memory 
and knowledge of real acoustic and musical events may be the biggest tool and 
advantage any recording engineer may possess.

One needs to be very careful when one hears traces of distortion prior to recording 
because some flavors of distortion that might seem acceptable (or even stylish) 
initially, may later prove to cause irreparable damage to  parts of the sound (for 
example, “warm lows” but “harsh sibilance”) or in louder or quieter sections of 
the recording. Experience shows that mic preamps and basic console routing paths 

Содержание Shelford 5051

Страница 1: ...By Serial Operations Manual Shelford 5051 Inductor EQ Compressor...

Страница 2: ...Do not block any ventilation openings Install in accordance with the manufacturer s instructions 8 Do not install near any heat source such as radiators heat registers stoves or other apparatus inclu...

Страница 3: ...ges SC HPF Applies a HPF at 250 Hz to the VCA side chain signal FF FB When engaged changes the VCA detection from feed forward to feed back Level Gain Reduction Meters 8 segment LED Meter for monitori...

Страница 4: ...rt is a half normal connection so if there is no signal on the S C insert return when it is plugged in there will not be any compression Power In 4 pin power connection with 24V DC from specialized 50...

Страница 5: ...io is obtained in the interest of intelligibility within the limited performance of say a reporter s recording device Digital recorders are unforgiving when overloaded Overload can be avoided with car...

Страница 6: ...n control or fader consisting of a high quality variable resistor that by definition has a linear transfer characteristic A dynamics controller i e a compressor limiter or expander is a gain control t...

Страница 7: ...08 HOW THE 5051 COMPRESSOR WORKS A part of the audio signal is rectified and smoothed to produce a suitable control voltage for the VCA which has to respond very quickly and have low distortion If the...

Страница 8: ...om the Portico II Master Buss Processor the 5051 can be configured within a 5088 console to deliver exceptional tonal and dynamic control on each channel Traditional transformer coupled inputs and out...

Страница 9: ...a Mid Hi Q switch to narrow the bandwidth increase the Q of the filter The 5051 includes an 18 dB octave high pass filter with cutoff frequencies on a button that toggles through OFF 60 Hz and 120 Hz...

Страница 10: ...y the amount of boost or cut gradually diminishes With the HI PEAK button pressed the high frequency band changes to peak mode with a bell shaped boost or cut curve The Peak mode utilizes an inductor...

Страница 11: ...er back to off or bypass which extinguishes the LED LOW FREQ The LOW FREQ rotary switch has 4 positions for selecting one of four corner or center frequencies for the low band EQ section The frequenci...

Страница 12: ...cluding pumping and a slight modulation distortion in the presence of loud low notes Medium settings are sometimes nice for having the compression act in time with the music Slow release settings tend...

Страница 13: ...to choosing compressor settings than meters The meter will generally indicate very brief gain reductions but will tend to exaggerate the duration so that the eye can see transient compression LEVEL M...

Страница 14: ...nto the link out jack Plug the other end of the cable into the link in jack of the 5051 to its right In the same way connect all of the 5051 units together LINE 1 XLR female transformer balanced float...

Страница 15: ...Noise from 10 Hz to 80 kHz 1kHz 20 dBu output Better than 0 007 20Hz 20 dBu out Better than 0 120 20kHz 20 dBu out Better than 0 070 The Compressor Threshold at 20 dB Ratio at 1 1 1 Gain at 0 Noise M...

Страница 16: ...Low Frequency EQ Color Sweep Trace Comment 1 1 Red EQ Flat 2 1 Cyan 35 Hz Full Boost 3 1 Cyan 35 Hz Full Cut 4 1 Green 60 Hz Full Boost 5 1 Green 60 Hz Full Cut 6 1 Magenta 100 Hz Full Boost 7 1 Mage...

Страница 17: ...5 20 15 10 5 0 5 10 15 20 d B u 10 200k 20 50 100 200 500 1k 2k 5k 10k 20k 50k Hz Color Sweep Trace Comment 1 1 Red Flat 2 1 Magenta 200 Hz Full Boost 3 1 Magenta 200 Hz Full Boost Hi Q 4 1 Magenta 20...

Страница 18: ...SS LIMITED WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED TO THE EXTEND ALLOWED UNDER APPLICABLE STATE LAW IN NO EVENT SHALL RUPERT NEVE DESIGNS BE LIABLE FOR ANY SPECIAL INCIDENTAL OR...

Отзывы: