DYNAMIC RANGE COMPRESSION

Multiband Dynamic Compression is an integrated 24-band Dynamics Processor. Driven by the principles of Psychoacoustics, it employs completely linear phase signal processing. The integrated processing engine performs compression, limiting, expansion and noise-gating in a single processing block. Intelligent control over the operating points using a desired spectral balance or a signal-adaptive characteristics, is employed.
To change the dynamic range in different bands individually, this module is provided with greater functionality than any other product available in the market. At the heart of the processor is a specially designed filterbank for generating an extremely detailed time-frequency representation of the signal.

ADAPTIVE WIDE BAND NOISE REMOVAL

Model Q24 comes bundled with a world class real-time automatic noise control block. The user can choose a few optional parameters and background noises, including dynamic background noises, are automatically identified on the fly and removed from the audio. At a broad level the user can operate the algorithm with two different structures for the noise model:

White Model: For general noise types.

Color Model:For heavy noise reduction of a particular environment such as machine and instruments noise type.

VOICE/VOCAL ENHANCEMENT

This module enhances the speech/vocal content of the audio. It uses an accurate harmonic analysis of the input audio, and effectively enhances the vocal content. Using this information input audio sounds cleaner with improved presence. This module is also useful in sports/news broadcast to make the commentators voice more intelligible, where high background audience noise exist.

INTELLIGENT LOUDNESS CONTROL

This module uses a sophisticated stereo loudness measurement algorithm to estimate and control the signal loudness. The control is based on two sliders. The first being the release time, to control how fast the audio loudness should get adapted to desired level. The second slider is for the target output loudness level control, which may be set between 0dBFS and -15dBFS.

ENVELOPE/STEREO PROCESSING

This module controls the stereo balance in the audio. It may widen or shrink the stereo image depending on the characteristics of the stereo audio and the slider setting. This tool helps in maintaining a consistent stereo image which would make audio sound pleasant. A new user can safely set the dial at 0.3.

SIBILANT / FRICATIVE SMOOTHING

Sibilants tend to add to the some of the unwanted harshness in the broadcast audio since the perceived loudness of sibilants is quite high due to their high frequency content. This module dynamically detects the sibilant, fricative sections of the input audio and smoothes these sections. The slider controls include the Start Frequency, which specifies the frequency threshold above which the processing is done; this can be varied from 4 kHz to 8 kHz. The dial controls the intensity of processing done by the algorithm. A new user can safely set the dial at 0.2 and the start frequency at about 6-8 kHz.

DYNAMIC LISTENING FATIGUE REDUCTION

This is an audio sweetening tool that conditions the temporal envelope of the audio signal in multiple frequency bands. The 6 vertical bars below the dial provide finer control over envelope conditioning in individual frequency bands (with indicated center frequency values). The higher the sliders, the more conditioned the audio in that band is. There are two associated slider controls which control respectively the tonal characteristics of overall audio and the refinement level of envelope conditioning.

INCOHERENT COMPONENT SUPPRESSION

This module detects the incoherent components of the input audio and smoothes the corresponding audio component resulting in a sound that is easier to process by the human auditory perception system, thus increasing the listenability of the sound. The slider controls for this module include a Start Frequency, which specifies the frequency threshold above which the processing is done; this can be varied from 4 kHz to 8 kHz. The dial controls the intensity of processing done by the algorithm. A new user can safely set the dial at 0.2 and the start frequency at about 6-8 kHz.

MULTI-BAND GRAPHIC EQUALIZER

This module equalizes the audio in 10 bands according to the 10 slider setting. For all the slider at the middle of the range equalizer is effectively flat. Each slider can be moved between -5dB and 5dB. There are three options in the form of buttons, namely Tight Coupling, Loose Coupling and No Coupling, supported for coupling the sliders.

LOW-PASS

This module provides the flexibility of processing the low passed input audio. The filter is designed to provide a very high roll off with a minimum transition band of frequency. The check box provided is used to enable/disable the filtering process. The 3dB cut-off frequency can be selected from the options available in the drop down box or can enter a valid cut-off frequency in the box. The value entered in the box will now be available in the dropdown for this profile once saved.

BASS ENHANCEMENT

This module is provides an enhanced and stable bass content. This makes the high energy audio classes (e.g.: Rock, Dance) sound more punchy on speakers with sub-woofers. The check box is used to enable the module. The frequency slider (20Hz - 60Hz) is used to band of frequency which is processed. The gain (0.0 - 10dB) is used to set the level of processing.

FINAL LIMITER

The module determines the absolute maximum of signal level for the processed output. The slider has a range of 0.0 dBFs to -15dBFs.

PRE-EMPHASIS

The module provides the pre-emphasis, which is applied on the processed signal. This is generally on the signal before the FM/radio transmission to maintain a good SNR in high frequency. We provide the traditional pre-emphasis options of 50/75 micro seconds. Viewing the modern audio with good high frequency content, the two band limiter is used to maintain proper energy balance in low and high frequency in the pre-emphasized signal. The Check box is used to enable/disable the two bands Limiter. The slider is used to determine the maximum allowed level of the high frequency content. The slider is used to adjust this value between 0dB to -15dB.