5 Things to Know Before Buying Digital Signal Processing Products

CONNECT 6 includes three DSP plugins to help you get a clean, polished signal while recording. These plugins live on inputs 1 & 2, and you can set them yourself or use AUTO SETUP to configure them automatically. These plugins are powered by the CPU in CONNECT 6, so they will not incur latency in your session. 

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Read on to learn about the DSP tools in CONNECT 6. Check out more details about CONNECT 6 on the product page. 

Expander 

The expander might become your best friend if you have a noisy recording environment. These tools can be used as gates that can remove a variety of low-level noises, such as:

• Air conditioners
• Refrigerator hum
• Low-level traffic noise
• Instrument noise

Expanders are more commonly used in mixing or live performance situations. Still, if you have to record in a less ideal environment, an expander can help to clean up your audio. Here's a breakdown of the basic controls:

• Threshold: Whenever an audio signal falls below the threshold, it gets turned down in level. It's best to set your threshold just above the noise floor.
• Ratio: When the audio falls below the threshold, the ratio is the amount it gets turned down by. To remove noise, you typically want a high ratio.
• Attack & Release: This controls how quickly the volume changes occur. 

Compressor 

CONNECT 6 has a flexible compressor to tame transient sources like vocals, guitars, or even drums during tracking. Here are some examples of common uses for a compressor when recording:

• Controlling harsh transients: Some sound sources like percussion or vocal "plosives" can have sudden short volume peaks. Using fast-attack compression can fix these momentary dynamic spikes.
• Taming dynamic performances: The human voice is a very dynamic instrument, and small changes in performance can result in wildly varying input levels. Using compression, you can control the overall dynamics of a performance to make everything sound more uniform.

When recording, it's always best to err on the side of lighter compression. You can always compress things more in the mix, but you can't go backward. If you are recording vocals, try a ratio of 2:1, a 10 ms attack time, 100 ms release time, and adjust the threshold to get 2-3 dB of gain reduction during the loudest sections. This is a great starting point for taming the dynamics of a vocalist while recording in a very natural, transparent way. 

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Here's a breakdown of the basic controls:

• Threshold: Whenever an audio signal rises above the threshold, it gets turned down in level. 
• Ratio: When the audio reaches the threshold, the ratio is the amount it gets turned down by. The higher the ratio, the more extreme the effect.
• Attack & Release: This controls how quickly the volume changes occur. 

Equalizer 

Equalization is the process of boosting or cutting certain frequencies to alter the overall tonal balance of a source. CONNECT 6's flexible 4-band equalizer offers a variety of shapes, including shelves, bells, notches, and low/high cut filters, so you can clean up and enhance your audio.  

Here are three of the most common ways to use the CONNECT 6 equalizer during tracking:

• Apply a low-cut filter. This allows you to remove any subsonic frequency information you don't want in your recording. For example, for vocals, you can use the high pass button below the preamp gain knob for an 80 Hz low-cut filter. This will cut any mic stand noise, plosives, or rumble without affecting the fundamental frequencies of the vocal.  
   
• Notch out problem frequencies. Some instruments are highly resonant in specific frequencies, which can cause issues during mixing. Performing a "sweep" of these frequencies and cutting them with a narrow Q setting is a great way to set yourself up for success in the mix.

An "EQ Sweep" is the process of boosting an EQ band and moving it across the frequency range, listening for any unwanted sounds that occur. Once you've found your target frequency, reduce the gain below negative and adjust your Q to taste.

• Boost the high end. Some microphones and instruments may sound too "dark" or lacking in high frequencies. Use the Equalizer to solve this problem using the high shelf filter on band 4. Boosting just one or two dB can significantly affect the brightness of your audio!

Maximizer 

In CONTROL CENTER, you have two different mix buses, and each of them has a maximizer. A maximizer allows you to increase the overall level of the mix without worrying about distortion from clipping.  

An excellent use for this tool in recording is to increase the volume of your headphone mix. If you have quiet headphones or are working with a very quiet source, it's helpful to have an extra gain stage to turn up your monitoring volume without turning up the actual preamp gain and risking clipping the preamps. Maximizer will give you more volume than you need so that you can record with ample headroom. 

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