Graphic Equalizer

User Guide
Test Image
Test Image

Thank you for choosing REEQ!
In order to get the most out of this plugin, please take the time to read through this manual.
We also suggest to look at release information of this product which contains upgrade versions and product fixes and is available at REEQ Release Notes. For further support and questions, you can also contact us at Shunt Online Support.

Product Overview
RE Equalizer Logo REEQ® (Re-Equalizer, RE-EQ) is an offline Morphing graphic EQ for Android OS platform developed by WiseSchematics featuring 10 frequency cutoff bands plus input gain amplifier, a built-in high precision floating EQ filter, build-in threshold clipping gate, a real-time analyzer and wide range of controls for bands shaping.
Integrated with Shunt Audio Engine and Shunt Smart Interface, REEQ is loaded with advanced features and functionality and high quality audio results on a portability level.
REEQ components utilize special filters which eliminate the artifacts noise and distortion associated with band interaction, and provide perfect curve and stair-stepped responses. Finally, REEQ integrated real-time analyzer lets you compare the difference between audio signal. Created for live sound but equally useful in the studio as well both for advanced and new users, REEQ brings new level to portable music production and also to the music listening experience.
For its 10 main bands, the REEQ Classic component uses “Proportional Q” filters. The Q value is proportional to the gain adjustment; increasing a band’s gain narrows the filter width. REEQ is also integrated with threshold gate function which automatically cancels eq signal when hard clipping occurs across frequency bands.

Most graphic equalizers consist of a bank of filters with pre-determined (fixed) cutoff frequencies, typically divided into bands of 1/3 or one octave each, with frequency cutoffs defined by ISO standards (International Organization for Standardization). It’s common to see the gain controls set as a horizontal array of faders with the lowest frequency on the left and the highest on the right. So if one were to draw a line or curve that plots the gain fader positions at any given time, the resultant line would be a graphical representation of the equalizer’s current frequency response, hence the name “graphic equalizer.”
The REEQ offers one bands per octave for a total of 10 bands. REEQ includes a faders array as well as a real-time analyzer.


Test Image

As shown above, interface layout of REEQ is divided into 5 sections according to controls properties. Components that exhibit similar characteristics are arranged into same section as follows:
  • Control/Morph Section
  • Drag Section
  • Status Section
  • Preset Section
  • Fader Section
  • Monitor / FX Section
REEQ interface features fine controls to provide full freedom for sound tuning and tweaking so that users get the mix the way they want.

1. Control/Morph Section
Control Section is composed of strip of components that handle the properties of REEQ without need to directly interact with faders. The left side of Control Section consists of Bands Mixing/Morphing controls while the right side includes Global contols for REEQ.

Test Image

RANDOM sets the position of bands to random positions. Maximum value is 10dB so that clipping doesn't occur. Each time RANDOM is pressed, bands change their respective positions to different levels.
INVERT flips the position of bands across 0dB which means frequency band set at +10dB will change its value to -10dB across 0dB.
MORPH controls are used for precise control over sound by moving position of bands in one step at a time but can also be automated for advanced tuning. There are six type of MORPHING CONTROLS. SHIFT Left/Right: Pressing arrow to the right will move the current EQ shape to the higher frequencies, left arrow button shifts the current shape to the lower frequencies. StepUp: Move bands upwards one step at a time. StepDown: Move bands downward one step at a time. Split: Bands that have positive gain level will move in upward direction gain more boost and those with negative gain level will move downward cutting more gain one step at a time while those at 0dB level will remain unchanged. Merge: This in the inverse of Split control where bands with positive and negative gain values merge to 0dB one step at a time until all bands are flat. NOTE: All of the MORPHING controls can be automated by pressing AUT in Drag section.
UNDO/REDO (located in the center) is a two state button that allows to single-step through the edit history of sliders positions. First state reverts the changes one step back to the previously set sliders position through the history. 2nd State forwards through the history to the latest sliders position. Undo history changes whenever sliders are moved to the new position.
STRENGTH/SCALE are two similar controls but split according to the standalone and plugged versions of REEQ respectively. STRENGTH defines the overall intensity of Equalizer engine in three states as LOW, MEDIUM and HIGH with MEDIUM set as a default. In HIGH state, EQ is more effective but volume drop may occur when sliders pushed to higher levels. SCALE controls the maximum range of REEQ faders. The scale indicators next to the band faders update according to the selected scale. For example, if the 5dB scale is selected and 25 Hz is set to +5 dB, changing the scale to 15 dB increases the boost at 25 Hz to +12 dB. Range: 5, 15 dB.
GET/SET is used as backup for saving gain levels in custom presets. GET control is used to retrieve gain values from currenttly set band levels and setting them in one of the selected custom presets as backup by pressing SET button. It should be noted that SET control will only work on custom presets.
BYPASS/REALTIME control is used to temporarily break the sound of currently set gain levels to default levels without setting level of bands to flat position which can be restored by pressing REALTIME button.
FX button is used for showing hidden layout which is invisible by default and is further explained right after MONITORING section at the bottom of tutorial.
ON/OFF switch used to turn on equalizer engine and activating controls with default values. Turning OFF will disactivate the engine and controls.

2. Drag Section

Test Image

Drag Section provides different modes that react to user physical interaction with faders when controlling them with hand.

AUTORUN mode when pressed puts the equalizer in self-automation mode where all frequency faders gradually start moving from their position in certian direction and once they reach end level their position realigns to start level and start self-moving again. This mode is linked to MORPH controls and can be programmed to 4 directions that are left, right, top and bottom. During AUTORUN mode, users can change position of individual bands while they are still moving. Pressing it twice stops the automation.
DRAW mode is different than drag action and is sensitive to touchscreen swipe gestures. In this mode, faders morph their positions to user swipe events across faders layout by swiping up or down, left or right, continuously, to draw the EQ curve or line similar to the pencil drawing in Paint application. This mode can be used in situation where fast equalization is needed with precision to control loudness of certian or all frequencies.
LINK ALL mode relatively links all faders such that position of faders will change relative to the one that user is interacting with.
SELECTIVE LINK is a 4 state control i.e. SELECT, LINK, RE-SELECT, LINK. This mode is same as LINK ALL except that group of faders can be selected by user choice to link together which will relatively move to the selected ones. Atleast two faders should be selected for linking. To work in Selective Mode, press S-LNK and then tap on faders to mark as selected. Note: Tapping again on already selected fader will unmark it. Once you are done selecting faders, press S-LNK again to link marked (selected) faders together. Now selected faders will move with each other relative to their position. Those faders who are left unselected will keep their position unchanged. If you want to re-select unmarked faders or unmark currently marked faders, press S-LNK again for this process and then then press S-LNK to link together. If you want to independently adjust any of the selected faders, press SUS which stands for suspend to temporarily break selection, then adjust the desired selected fader or faders and then press LNK to restore linking. If you want to snap group of selected faders to the common value, press ABS (absolute) button. Note: Pressing Suspend or Absolute in S-LNK mode will not clear link selection. To clear selection and unmark faders, press CLR (clear) next to S-LNK button. Selecting other modes except Suspend and Absolute mode will also terminate S-LNK mode.
CHAIN mode is the most advanced and complex mode of all modes. It is also the default mode as eq is turned ON. CHAIN mode is based on sequencial concept in which all of the bands will follow in chain or sequencing formation to the band that user is interacting with. Unlike LINK mode, CHAIN mode forces bands position to always make a new formation whenever user presses or pushes any band. The concept of this mode is to make smooth transitions across frequency bands which can result in superior sound quality. These transitions can be in different shapes from curves to the diagonal lines etc. There are nine types of formations for chain mode.
Bar Diagram next to CHN command is used for changing the CHAIN types. In TYPE 1, sliders can follow the user band freely from any position making loose transitions at any level. In TYPE 2, all sliders are locked to the user band moving relatively across neutral 0dB level which means if the user pushes back the slider to neutral position from any level, other sliders which are in chain range will also rest at same position. Only 5 formation types are available in case of TYPE 2.
The first four controls from "1+ to 4+" make tight to lose curve transitions with the 1+ being most tight and the 4+ being most loose formation.
INCREMENTAL formation covers first 4 controls in a single control by gradually loosening the bands with the closest band being most tight and farthest being most loose to the one that user is interacting with.
ALTERNATE formation provides uniform alternations between the faders by arranging them in a zig zag shape.
WAV formation arranges faders in sinusoidal shape.
ABSOLUTE mode is used to make all faders flat on any other gain value by snapping position all faders to the "common value" which is position of the fader that user is interacting with. In S-LNK mode, when ABSOLUTE is pressed, marked faders are seperated from none selected faders. In this case, if user interacts with any of selected faders, all of the selected faders will snap their position to common value but none selected will remain their positon unchanged. But if user interacts with none selected fader, then all of faders including marked ones will snap position to the one that user is interacting with.
SUSPEND mode cancels the function of all previous modes except S-LNK and sets all faders free from each other. In this mode users have full control over the faders and can select any individual band moving up or down independently to set its boost/cut.

3. Status Section

Test Image

This section displays information about currently selected Preset, Mode, Scale and Audio Analyzer.

3. Preset Section

Test Image

This part of REEQ is composed of strips of Presets easily accessable. There are total 26 presets with 20 pre-defined Factory presets for music production engineered by Musician Sohail K, 5 User Defined custom presets and 1 empty preset for sound check. "Sound Check" is empty all the time which means it is used for sound check only and can adopt the values of other presets. Everytime user interacts with frequency faders, REEQ selects "Sound Check" preset. When in SoundCheck mode, saving values in Custom Presets can also be done through GET control and then selecting anyone of custom presets and pressing SET control to save levels.

4. Fader Section

Test Image

In this section user interacts with frequencey cutoff bands in real time. Faders control the gain of selected frequency center. There are 10 frequency band sliders along with 1 input gain slider. The frequency range of band sliders is from 20Hz~18kHz and default level range is +/-15dB. The level range can be scaled down through SCALE control. Input gain slider boosts input signal and is useful when input signal is too weak for mixing. REEQ is integrated with threshold gate function which automatically cancels eq signal when hard clipping occurs across frequency bands. When REEQ is in Draw mode, faders layout becomes sensitive to swipe touch gestures.
FLAT (located at the top right) control snaps all bands to 0dB by flattening position of bands. Note: Unlike BYPASS, change of postion of sliders can be set to previous state by pressing Undo button.
MTR (located at the bottom right) stands for Monitor which activates the visualizer. For further details, refer to the Monitoring section below.

5. Monitoring Section

Test Image

This section of REEQ consists of audio analyzer which is used for visual audio monitoring and lets you see what you hear. Audio Anylizer reads input signal and displays in the form of visual frequency spectrum and PEAK/RMS values. Andio Analyzer is sensitive to input gain signal, frequency bands and media volume of the device. For accurate monitoring, please make sure that device media volume is set above 90%. Freq range of audio analyzer is 20~16kHz and level range is -96~0dBFS. By default, audio analyzer is turned OFF which can be enabled by pressing Monitor button which is located at the bottom of Fader Section.

6. FX Section

Test Image

FX Panel is hidden by default and consists of two seperate audio effects i.e. Depth and Surround. These effects individually process audio signal which means even if EQ engine is completely turned off, they still work. To display FX panel, press the FX button located in the CONTROLS section.
DEPTH is a single lower frequency band effect which can enhance depth of output audio by creating a sub-sonic experience. Note: When set to high gain, a severe drop in device volume can occur therefore it is recommended to use it only when its important or at low levels.
SURROUND effect when activated expands the audio channels resulting in more spatial, virtualized and wide-stereo sound.

1. Processing EQ
REEQ is attached to gloabal audio output once application is launched and disintegrates after exit. Tap the checkbox located at top-right of REEQ interface tp engage/disengage equalizer with audio output. For better compatiblity and integration with device output sound, please make sure that no other equalizers or random effects are running in background.

2. Performance
To achieve better interactivity as well as multitasking, REEQ interface along with its components has been tweaked and re-designed several times specifically tuning the faders section for smooth input which is core of interface. But if you still experience lags, try to turn off REEQ visual monitoring.

3. Settings
Saving settings includes backup of Custom Presets, input gain, current preset and eq ON/OFF. For learining about creating Custom Presets, please refer to Presets section in Controls layout. Status about input gain, current preset and eq ON/OFF are saved once application is exited through pressing "BACK" button. NOTE: Exiting/Removing application from Recents List will result in saving failure. Make sure that "Back" button has been pressed before removal from recents list.

4. Compatibility Issues
Standalone version of REEQ may face compatibitlity issues on some brands with custom modified Android OS as most of the vendors implement their own AudioEffect libraries in their devices which may cancel effect of third party equalizers. Also some music players may also not allow external equalizers. So there is a hit and miss scenario for global audio effect across Android environment. If you are facing such issues, please follow the below guideline.
  • Turn OFF or stop/disable any kind of built-in/external equalizers or AudioEffects (like "SoundAlive" used in Samsung devices) under Application Manager settings before using REEQ. Such libraries can cause interferance issues and may cancel or block effect from each other.
  • For better connection between target application and REEQ, first lauch target application like music player, then open REEQ.

©2017 WiseSchematics, ShuntCorp