User manual ALESIS DEQ230D

[. . . ] Reference Manual This page intentionally left blank 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Table Of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Welcome!. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 DEQ230 Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 How to Use This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Important Safety Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Important Safety Instructions (English) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] This resets the bands within the Edit Group back to their original values. From this point you can change the Relative Gain of the Edit Group in 2 dB increments by holding one of the [DOWN/UP] buttons and pressing the other one repeatedly. For maximum preservation of fidelity of the input signal, the largest number of bands in a channel should be set to 0 dB. For example, if you have more than half of your bands set to some cut amount and the majority of those cut frequencies are at -4 dB, then select all bands and compensate by +4 dB. 34 Basics of Equalization upward until it reaches 24. This is because that's how far the band that was set to -12 dB had to travel until it hit the "ceiling, " or + 12 dB (see fig. 2). 3 But what about the band that was set to 0 dB originally. . . was it boosted to +24 dB?The answer is, "Yes and no. " It was, in the sense that the DEQ230 keeps track of the proportional values of the bands, even if they exceed the +/-12 dB limit of gain change for a frequency. But the audible audio gain is limited to +/-12 dB. The reason the DEQ230 keeps track of the gain relationship between the bands in the Edit Group is simple. It's so you can change your mind, pull them back down to values within the +/12 dB limit, and still have them be the same distance apart!For example: let's say you decided these frequencies have been boosted too much, and you cut them by 12 dB. At this point the Relative Gain display would read "12, " with band one's Gain LED at +12 dB and band two's Gain LED at 0 dB (as in fig. So far you haven't really reduced the gain of the first band, because it's still at +12 dB. You still want to bring it down a bit, so you take both frequencies down another 3 dB. So now the Relative Gain display would read "9, " with band one's Gain value at +9 dB and band two's Gain value at -3 dB. And now you can see that the gain relationship between the two bands was preserved; they're still 12 dB apart. Remember, pressing the [DOWN/UP] buttons at the same time will reset the Relative Gain Display to 0. From this point you can change the Relative Gain of the Edit Group in 2 dB increments by holding one of the [DOWN/UP] buttons and pressing the other one repeatedly. This can be a real time-saver if you want to get from a Relative Gain value of +24 to a value of ­24! 35 3 Basics of Equalization One important note, though; Proportional Gain Memory is only temporary. If you have run one or more bands "past" the +/-12 dB limit and then you exit Edit mode for any reason (such as to store the program), the gain value of those bands will be remembered as +/-12 dB (whichever was the value that was last reached for those bands). The Limits of Relative Gain There will be times when the Relative Gain display will not go all of the way up or down to a value of 24. This is because the DEQ230 takes into account the gain setting of all of the bands when an Edit Group is formed. If the highest gain setting of any band in the Edit Group is + 6 dB, then from there down to -12 dB is only 18 dB. So this is the largest number you will see in the Relative Gain display if you run the relative gain value all the way down (see fig. [. . . ] (1. 4 kg) 75 Specifications This page intentionally left blank 76 Warranty / Contact Alesis Limited Warranty ALESIS CORPORATION ("ALESIS") warrants this product to be free of defects in material and workmanship for a period of one (1) year for parts and for a period of one (1) year for labor from the date of original retail purchase. This warranty is enforceable only by the original retail purchaser and cannot be transferred or assigned. For the most effective service, the purchaser should register the purchase on the ALESIS website at http://www. alesis. com/support/warranty. htm. During the warranty period ALESIS shall, at its sole and absolute option, either repair or replace free of charge any product that proves to be defective on inspection by ALESIS or its authorized service representative. [. . . ]