User manual DBX DDP

[. . . ] | Digital Dynamics Processor DDP Operator Manual ® WARNING CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN FOR YOUR PROTECTION, PLEASE READ THE FOLLOWING: WATER AND MOISTURE: Appliance should not be used near water (e. g. near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings. POWER SOURCES: The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance. [. . . ] Frequency Center from 25Hz to 20kHz: You can choose a center frequency from 25Hz to 20kHz all all three bands of the EQ. Q from . 25 to 16: "Q" is a setting that measures the width of the effect beyond the center frequency. For example, a Q of 8 or 16 will produce a very sharply pointed EQ setting, effecting very few frequencies outside of the selected frequency center. A Q of . 5 or 1 produces a very wide range of effect beyond the center frequency. The effect is a broad, smoother EQ setting. The sidechain functions are convenient in many applications, such as broadcast engineering, where engineers are asked to provide "ducking" functions, as well as de-essing. Frequency-specific and sustain-related compression are also possible with the use of the sidechain functions of the DDP. See figure below for an illustration of the relationship of the sidechain path to the DDP's metering points. It is possible to separate certain vocals and instruments from a mix using frequency-weighted compression. With the 3-band parametric EQ in the sidechain path, the equalization settings do not shift the timbre or frequency response of the audio signal. They merely alter the threshold response of the processing section of the DDP on a frequency-weighted basis. With this arrangement, raising certain frequencies on the equalizer causes them to be suppressed in the audio signal. A relatively high threshold setting can allow normal sounds to be unaffected while solo and very loud sounds are held back. (Of course, when compression does occur, the level of the entire program is affected. ) Depending on the threshold setting, lower level fundamentals or harmonics will not cause compression. During the recording of cymbals and tom-toms, a compressor with an equalizer in the sidechain path can help prevent tape saturation. The equalizer can be adjusted for boost with a peak of about 5kHz, causing the cymbal to be compressed on a very loud crash, stopping tape saturation at high frequencies, where there is less headroom. However, gentle tapping of a drumstick or brushing of the cymbal will not be held back. Assuming the tom-tom is a lower frequency instrument and can be better tolerated by the tape, it has less need for compression. The equalization in the sidechain circuit means that the compressor is not triggered as readily by a loud tom-tom beat as by an equally loud cymbal crash. The converse of the above EQ technique may be used: dipping the equalizer bands causes any sound with dominant energy in the affected register to pull the level up because the DDP will detect a need for less compression. To apply de-essing to vocals without using the De-Esser element, use the parametric equalizer in the sidechain circuit and set it for high frequency boost in the specific frequency range where the vocal hiss or lisp occurs (generally in the 4-6kHz region). This pre-emphasizes the already hissy vocal input to the detector. Used in conjunction with a moderate to high threshold and compression ratio, this arrangement greatly attenuates the essing without affecting the basic sound quality or balance of the voice. [. . . ] If you have not already taken the time to fill out your warranty registration card and send it in, please do so now. Before you return a product to the factory for service, we recommend you refer to the manual. Make sure you have correctly followed installation steps and operation procedures. If you are still unable to solve a problem, contact our Customer Service Department at (801) 568-7660 for consultation. If you need to return a product to the factory for service, you MUST contact Customer Service to obtain a Return Authorization Number. [. . . ]