Basics of Equalization 3

The "Hidden" Modes

There are several sub-levels of operation that can be accessed from Program mode by pressing different buttons. We covered Channel Level mode and Audition mode on the preceding pages; here are two more “hidden” modes:

Demonstration mode

Sometimes it’s fun to have a lot of little lights flashing from the stage or in the studio. The DEQ230 has a special key combination that will activate a “light show” for the entertainment of your clients, audience, or children. To begin the pyrotechnics, first make sure you are in Program mode. Once you are, hold down the [LINK/EXIT] button and press the [UP] button.

To exit Demonstration mode, press the [LINK/EXIT] button.

Being in Demonstration mode is something like being in Audition mode; the DEQ230 will cycle automatically through all 60 programs one after the other. The main difference is that while in Demonstration mode, the audio signal is bypassed.

Real-time Analysis mode (DEQ230D only):

The DEQ230D is capable of another “light show” that is even more useful than it is entertaining. Real-time analysis (RTA) mode uses the Band Gain LEDs to show you exactly which frequencies are present in the audio signal that is passing through the DEQ230D. This is an extremely useful tool that has been a mainstay of serious sound reinforcement engineers for decades.

To enter RTA mode, press the two leftmost [BAND SELECT] buttons on Channel A (25 Hz and 31 Hz). Immediately, the DEQ230D will start giving you visual feedback as to what is going on with the instrument or mix that is being processed. RTA mode monitors the outputs of the DEQ230D, so when you press the [BYPASS] button you will be seeing what you are hearing: the unprocessed signal.

Metering modes

Like any professional audio product, the DEQ230D allows you to configure the response of the Band Gain LEDs while in RTA mode. Use the [DOWN] and [UP] buttons to select between the four different settings:

00Peaks are not held.

01Peaks are held for one second.

02Peaks are held for two seconds.

OOPeaks are held until the metering mode is switched to another setting, or until you exit RTA mode.

If you want to reset the peaks while they are being held in Momentary 1, Momentary 2, or Continuous settings, press the [DOWN] and [UP] buttons at the same time.

There are two ways to get out of RTA mode: pressing the

25 Hz and 31.5Hz buttons on Channel A simultaneously, or by pressing the [LINK/EXIT] button.

Held peaks may be reset at any time by pressing the [DOWN] and [UP] buttons simultaneously.

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Alesis manual Hidden Modes, Demonstration mode, Real-time Analysis mode DEQ230D only, Metering modes
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DEQ230, DEQ230D specifications

The Alesis DEQ230 and DEQ230D are sophisticated digital equalizers designed for audio professionals seeking precision in sound control. Equipped with advanced features and innovative technologies, these units cater to a variety of applications, from live performances to studio recordings.

Both models include a powerful 31-band graphic equalizer, allowing users to sculpt their sound with incredible accuracy. The DEQ230 and DEQ230D offer extensive frequency coverage from 20 Hz to 20 kHz, ensuring that all audible frequencies are managed effectively. The 1/3-octave resolution facilitates fine adjustments, enabling sound engineers to target specific problem frequencies within the mix.

One of the notable characteristics of the DEQ230 series is its dual-channel operation. The DEQ230 provides individual equalization for two separate channels, making it an excellent choice for stereo setups or multi-channel applications. The DEQ230D takes this functionality even further by incorporating digital connectivity, allowing for seamless integration with digital audio systems and enhancing flexibility in various setups.

In terms of technology, the DEQ230 and DEQ230D utilize state-of-the-art digital signal processing (DSP) to deliver high-quality audio performance while minimizing latency. These models feature comprehensive output level control and provide precise metering through LED indicators, which allows sound engineers to monitor levels easily while adjusting the EQ settings.

Moreover, both equalizers come equipped with a variety of memory presets. This feature enables users to save and recall specific settings, streamlining the workflow during live events or studio sessions. The intuitive interface ensures ease of use, with clearly labeled controls that facilitate quick adjustments on the fly.

Alesis has also prioritized durability in the design of the DEQ230 and DEQ230D. The robust construction and rack-mountable chassis make them ideal for both touring and permanent installations. Additionally, the inclusion of balanced XLR and TRS inputs and outputs guarantees compatibility with professional audio gear while minimizing signal degradation.

Overall, the Alesis DEQ230 and DEQ230D represent valuable tools for any audio professional, offering precision, versatility, and robust performance in a compact design. Their combination of advanced features and user-friendly interface makes them an excellent investment for enhancing sound quality in any audio environment.
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