Korg Krossfour KF4 Manuale utente

OWNER’S MANUAL

MANUEL D’UTILISATION

BEDIENUNGSANLEITUNG

Precautions

Location

Using the unit in the following locations can result in a malfunction.

•In direct sunlight

•Locations of extreme temperature or humidity

• Excessively dusty or dirty locations

•Locations of excessive vibration

•Close to magnetic fields

Power supply

Please connect the designated AC adapter to an AC outlet of the correct voltage. Do not connect it

to an AC outlet of voltage other than that for which your unit is intended.

Interference with other electrical devices

Radios and televisions placed nearby may experience reception interference. Operate this unit at a

suitable distance from radios and televisions.

Handling

To avoid breakage, do not apply excessive force to the switches or controls.

Care

If the exterior becomes dirty, wipe it with a clean, dry cloth. Do not use liquid cleaners such as

benzene or thinner, or cleaning compounds or flammable polishes.

Keep this manual

After reading this manual, please keep it for later reference.

Keeping foreign matter out of your equipment

Never set any container with liquid in it near this equipment. If liquid gets into the equipment, it

could cause a breakdown, fire, or electrical shock.

Be careful not to let metal objects get into the equipment. If something does slip into the

equipment, unplug the AC adapter from the wall outlet. Then contact your nearest Korg dealer or

the store where the equipment was purchased.

THE FCC REGULATION WARNING (for U.S.A.)

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC

Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This

equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the

instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will

not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which

can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more

of the following measures:

•Reorient or relocate the receiving antenna.

•Increase the separation between the equipment and receiver.

•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

Unauthorized changes or modification to this system can void the user’s authority to operate this equipment.

CE mark for European Harmonized Standards

CE mark which is attached to our company’s products of AC mains operated apparatus until December 31, 1996 means it

conforms to EMC Directive (89/336/EEC) and CE mark Directive (93/68/EEC).

And, CE mark which is attached after January 1, 1997 means it conforms to EMC Directive (89/336/EEC), CE mark Directive

(93/68/EEC) and Low Voltage Directive (73/23/EEC).

Also, CE mark which is attached to our company’s products of Battery operated apparatus means it conforms to EMC Directive

(89/336/EEC) and CE mark Directive (93/68/EEC).

A note about using this video device

Some people subjected to stimulation by intense light or rapidly flashing images may experience symptoms

of temporary muscle spasms or loss of consciousness. If you experience any such symptoms, stop using this

device immediately and seek medical attention.

In particular when using this device in a public place or other location where there are large numbers of

people, you must take into account people other than the operator, and avoid creating and displaying con-

tinuous successions of images that might produce this type of intense stimulation.

Korg Corporation accepts no responsibility for any health problem or personal or property damage that may

occur to the operator or observers from use of this device in violation of this warning.

This professional device is intended only for use with works for which you yourself own the copyright, for

which you have received permission from the copyright holder to publicly perform, record, broadcast, sell,

and duplicate, or in connection with activities which constitute Ågfair useÅh under copyright law. If you

are not the copyright holder, have not received permission from the copyright holder, or have not engaged

in fair use of the works, you may be violating copyright law, and may be liable for damages and penalties.

If you are unsure about your rights to a work, please consult a copyright attorney.

KORG TAKES NO RESPONSIBILITY FOR ANY INFRINGEMENT COMMITTED THROUGH USE OF

KORG PRODUCTS.

Video Signal Standard

The krossfour can operate in either NTSC or PALmode. Use the NTSC/PALswitch to select the

correct video standard for your equipment or area. Note that the unit will not operate correctly

if the NTSC/PAL switch setting does not match the video standards of your other equipment.

Note: “NTSC” is the standard used in Japan and North America.

Do not change the NTSC/PAL switch setting while the power is ON. Turn the power off first.

The krossfour will not operate correctly with non-interlaced signals.

The output signal from copy-protected DVD and video sources may be discolored and noisy.

Noise may occur with certain devices or media, depending on their individual characteristics and capabilities.

Owner’s Manual

Thank you for purchasing the krossfour 4-channel video mixer & switcher. To enjoy long and trouble-free

use of this product, please read this manual carefully and operate this unit only as directed.

Features

Two-channel video mixer with four source inputs

Up to four video sources can be connected to the krossfour, and any of the four sources may be

individually assigned to each of the two mixer channels. Simple, intuitive design makes it easy

to carry out switching and mixing for a wide variety of applications: video jockeying, video per-

formance, video editing, and more.

Backlit Crossfader

The crossfader control lets you dynamically adjust the mix between the two video channels in

realtime. By selecting different fader curves, you can change the characteristics of the fader and

access different types of mixing techniques.

Monitor Output

The Monitor output allows you to preview or “audition” any of the video sources, without af-

fecting the mixer output - sort of like headphones for the eyes.

Chroma-key or “Blue-Screen” effects

Chroma-key is a type of compositing effect that removes (or “keys-out”) a specific color from

a video image, allowing a background video source to show through. Spaceships whizzing past

planets, superheroes flying through the air, or the local forecaster standing in front of a chang-

ing weather map are examples of Chroma-key effects.

Luma-key effects

Like Chroma-key, Luminance-key (or “Luma-key”) is also a compositing effect that removes

a specific part of a video image, allowing a background video image to show through. Luma-

key uses a brightness value (Black or White) to specify the keyed-out area, instead of a particu-

lar color value. For example, white titles prepared on a black background can be made to float

on top of any video image by using Luma-key to remove the black areas from the title shot.

Internal Time Base Corrector (TBC)

Time Base Correction is needed to provide stable synchronization when working with multiple

video sources. TBC digital processing provides excellent synchronization and ensures stable im-

aging when mixing or switching signals from various DVD players, VCR, video cameras, PCs

with video output capability, and other such devices.

The switching of input and monitor sources isnot image synchronized. This type of switching may cause dis-

turbances in the image.

Switches and Connectors

Top Panel

1. INPUT A SELECT keys

These keys select the input source for Channel A.

When you press a key, it will light up solid to indicate that the source is selected.

If the MODE switch is set to C-K (Chroma-key) or L-K (Luma-key), the selected source will be

used as the background image for a compositing effect.

Press the same key a second time and it will begin blinking. When the key is blinking, the in-

put source will be ignored, and the output of the channel will depend on the MODE setting.

If the MODE switch is set to BK (Black) or WH (White), the blinking key indicates that the unit

is ignoring the source image and outputting the specified background color instead. These solid

backgrounds can then be used as a source for video mixing.

If the MODE switch is set to C-K (Chroma-key) or L-K (Luma-key), the blinking key indicates

that the input source will be ignored and a black background will be used for the compositing

effect.

Note: If there is no device connected to the selected input (or there is no signal from the connected unit), the krossfour

will output a blue background screen.

Owner’s Manual

2. INPUT B SELECT keys

These keys select the input source for Channel B.

When you press a key, it will light up solid to indicate that the source is selected.

If the MODE switch is set to C-K (Chroma-key) or L-K (Luma-key), the selected source will be

used as the foreground image for a compositing effect.

Press the same key a second time and it will begin blinking. When the key is blinking, the in-

put source will be ignored, and the output of the channel will depend on the MODE setting.

If the MODE switch is set to BK (Black) or WH (White), the blinking key indicates that the unit

is ignoring the source image and outputting the specified background color instead. These solid

backgrounds can then be used as a source for video mixing.

If the MODE switch is set to C-K (Chroma-key) or L-K (Luma-key), the blinking key indicates

that the input selected for Channel B will be ignored and only ChannelAwill be output. In the

C-K Mode, however, if the HOLD key is pressed while any INPUT B SELECT key is blinking,

a black screen will be output for Channel B instead.

Note: If there is no device connected to the selected input (or there is no signal from the connected unit), the krossfour

will output a blue background screen.

3. HOLD keys

There are two HOLD keys; one for each channel. Pressing the HOLD key freezes the image from

the selected source (on that channel), so that the image appears as a still. The key acts as a toggle:

press it once to freeze the image, and again to return to a moving image.

Note that you can change the input source while the image is frozen, but the frozen image will

continue to be output until the HOLD key is released.

In the C-K mode, the Channel B HOLD key has a special function. When any of the INPUT B

SELECT keys are blinking, pressing the Channel B HOLD key will cause Channel B to output

a full black screen.

4. Fader

Dynamically adjusts the mix between Channel Aand Channel B. If the MODE switch is set to

C-K or L-K, the fader operates only on the foreground or overlay (Channel B) portions of the

image.

5. MONITOR SELECT keys

The MONITOR feature allows you to view any input source before it is assigned to a mixer

channel. This provides you with the ability to preview, audition or “cue-up” a video source. Use

the MONITOR SELECT keys to select which of the four inputs will be sent to the MONITOR

OUT jack on the front panel. If you select OUT, the MONITOR OUT provides the same (mixed)

signal as the VIDEO OUTPUT jack.

6. Power Indicator

Lights up to indicate that the power is on.

Note: If this lamp starts blinking, please turn off the power immediately.

Front Panel

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1. FADER CURVE switch

This switch selects the fader curve. The curve determines how the fader affects the mixing of

the two channels. If the MODE switch is set to C-K or L-K, the fader only affects Channel B.

(Normal curve) : Sliding the fader causes a gradual, linear change in the mix between the

two channels. The center position corresponds to a 50:50 mix. This is a typical crossfade opera-

tion; movement in either direction attenuates one channel while amplifying the other.

(No mix) : Sliding toward the center attenuates both channels; sliding to either end ampli-

fies the corresponding channel. The two channels never mix.

(Center mix) : Channels are mixed only over the central span of the fader range,

(Switcher) : The fader acts like a toggle switch that selects either Channel A or Channel B.

There is no attenuation and no mixing.

2. MODE switch

Selects the background color or the overlay mode.

BK (Black): Sets the background color to black.

WH (White): Sets the background color to white.

C-K (Chroma key): The unit cuts out the blue parts of the (foreground) Channel B image, so that

the Channel A signal (background) shows through the cutouts.

L-K (Luminance key): The unit cuts out the black and white portions from the (foreground)

Channel B signal, so that the Channel A image (background) shows through the cutouts.

Note: For C-K and L-K modes, Channel Aserves as the background and Channel B is the overlay. Note that when

signals are being mixed in these ways, the fader affects only the Channel B image.

3. FINE knob (C-K/L-K Level Adjustment)

This control is effective only in C-K and L-K modes. If the mode is set to C-K, this knob will

adjust the color of the area that will be “keyed-out” or removed from the foreground image

(Channel B). If the mode is set to L-K, this knob will adjust the brightness level (from white to

gray to black) of the area that will be “keyed-out” or removed from the foreground image

(Channel B).

4. INPUT 4 jack

This input accepts a composite video signal.

5. MONITOR OUT jack

The signal provided by this output is selected by using the MONITOR SELECT keys.

Owner’s Manual

Rear Panel

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1. INPUT 1 S-VIDEO connector

This input accepts an S-VIDEO connector.

2. INPUT 1 jack

This input accepts a composite video signal.

If you connect both the S-VIDEO connector and the INPUT 1 jack, only the S-VIDEO input will

be effective.

3. INPUT 2 jack, INPUT 3 jack

These inputs accept composite video signals.

4. OUTPUT S-VIDEO connector

This output provides the output from the krossfour’s mixer as an S-VIDEO signal. Specifically,

this signal will be the signals from ChannelAand Channel B (as selected by the INPUT SELECT

keys), after they have been mixed and processed by the fader.

5. OUTPUT jack

This output provides the output from the krossfour’s mixer as a composite video signal

Note: The OUTPUT S-VIDEO connector and the OUTPUT jack both provide the same content. Both outputs can

be used at the same time.

6. NTSC/PAL switch

This switch is used to select the video standard you are using. Turn the krossfour off to change

the setting on this switch. The krossfour reads the setting of this switch when power is first

turned on, and the setting cannot be changed until you turn the power off.

NTSC: Japan, North America, etc.

PAL: Europe, etc.

Note: Be sure this switch is set to match the standard of your input signals, or the output signal will be garbled.

7. DC 7V IN

Connect the AC adaptor (included) to this jack.

8. Power switch

Switches the power between ON and STANDBY.

Operating Procedure

1. Make the connections.

Connect the OUTPUT jack, the OUTPUT S-VIDEO connector, and/or the MONITOR OUT jack

of the krossfour to the input of the display device(s) - monitor, projector, etc.

Connect the output of the source devices (DVD players, cameras, PCs, etc.) to the INPUT jacks

of the krossfour.

Connect the AC adapter (included) to the DC 7V IN connector, and plug the other end into a

power outlet.

2. Turn on the power.

Turn the power switch ON.

3. Select and control the image output.

Use the INPUT SELECT keys to select an input source for each channel.

Slide the fader to theAside to output the source signal selected by the INPUTASELECT keys.

Slide the fader to the B side to output the source signal selected by the INPUT B SELECT keys.

Select a different FADER CURVE setting to change the fader’s operating characteristics.

4. Output a still image.

Press the HOLD key for either channel to freeze the channel’s input signal and output this fro-

zen image as a still. Press the HOLD key a second time to return to normal output.

5. Output the selected background color from either channel.

Either channel can be set to output a black screen image or a white screen image. Choose which

Channel will output the background color, and press the currently lit INPUT SELECT key for

that channel. The key will start to blink, and the input signal will be replaced by the background

color selected by the MODE switch, either black (if the MODE switch is set to BK) or white (if

WH).

6. Creating Composite Images

Composite images (or “compositing effects”) are special effects that combine two video sources

into one image - placing a toy dinosaur in downtown Chicago, for example. Generally, one

image is set as the background plate, and portions of the second image appear in the foreground

as an overlay.

There are two different ways to specify which portions of the foreground image will be keyed-

out, allowing the background image to show through. Chroma-key effects remove areas of the

foreground based on their color. Traditionally, the blue portions are removed, so a subject stand-

ing in front of a “blue screen” can be superimposed on any background. Luma-key effects rely

on removing the black, white or specific gray portions of the image based on their brilliance,

rather than color.

When using the krossfour in the Chroma-key (CK) or Luma-key (LK) modes, Channel Awill

be used as the background plate, and Channel B will be used as the overlay, or foreground

image. Here’s how. Select the source for the background image by pressing the appropriate IN-

PUT A SELECT key. Select the source for the overlay (foreground) image by pressing the ap-

propriate INPUT B SELECT key.

Use the MODE switch to select the type of compositing effect; either C-K (Chroma-key) or L-

K (Luminance-key). If you have selected C-K, the blue parts of the foreground image (Chan-

Owner’s Manual

nel B) will be removed. If you have selected L-K, the black or white portions ofthe foreground

image (Channel B) will be removed. In each case, the ChannelAimage will be visible through

the areas that have been removed by the “key” effect.

You can adjust the extent of the cut-out area by using the FINE dial. Sliding the fader to the B

side will make it easier to adjust the FINE dial setting.

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