Advancing the technology of Anadigm’s ground-breaking SonicMaster1, the SonicMaster2 offers an advanced bass frequency signal processing module solution with an enhanced feature set that can be easily and quickly adjusted via a PC GUI (graphical user interface).
This allows rapid control of parametric settings for subwoofers, active loudspeakers and low frequency effects (LFE). Anadigm's audio dpASP (dynamically programmable snalog dignal processor) delivers a programmable platform for comprehensive subwoofer signal conditioning that provides equalisation, adjustable filters, and limiters, thereby enabling protection from amplifier clipping and woofer bottoming for active subwoofer designs.
Consumers are demanding more features, but easier to understand controls. Room correction/AutoEQ is a feature that appeals to the audiophile class of listener, and is quickly becoming popular amongst commercial subwoofers. Room correction, AutoEQ, and other trade names are used to describe DSP-based solutions that use a microphone, a test signal and a simple interface to adjust the parametric equalisation without specialised user knowledge. Since SonicMaster is dynamically reconfigurable, it can adapt in realtime to changes in the environment where the subwoofer is used, enabling implementation of AutoEQ processing. With this feature, designers could offer professional installers or end users the ability to alter frequency and roll-off characteristics in homes for optimal sound quality, or even implement a self-tuning function that would perform this step automatically. If furniture is moved around, or a new listening position is desired in the room, optimisation can be accomplished by the touch of a button.
Also available is the Subwoofer Module. This is a 3,3 V, 2-chip solution using dpASP with an Audio State Machine, enabling audio designers to develop signal processing functions that can be dynamically configured under the control of the software. The 2 band parametric EQ allows for adjustment of Linkwitz Transform Pole Frequency, Pole Q, Zero Frequency and Zero Q.
The SonicMaster2 evaluation board comes out of the box with useable pre-sets so that no engineering time or money needs to be spent on a steep learning curve. The designer may customise the default settings using the GUI. There is no need to learn how to use a DSP, or hire a DSP programmer since this system works entirely in the analog domain. For example, if you decide to add 1 or 2 notches, the centre frequency, bandwidth and cut are easily adjusted using the graphical slider controls.
SonicMaster features 100% analog signal path for pure analog sound, options for pushbutton or rotary controls, LCD display module, factory presets and end-user adjustments. Additionally, it provides programmable standby power mode, an auto mute feature that eliminates low-level noise between cuts and during standby mode, and optional active differential input connections. Accuracy and control of the filter characteristics are to a very high tolerance due to better than 0,1% component matching within the IC, with virtually no drift over temperature. Typical passive crossover networks tend to have tolerances over 10% (especially at high power levels due to thermal drift) and even active op-amp designs have approximately 5% variation. Stereo imaging of phased arrays will all benefit from this precision response.
A full featured SonicMaster2 starter kit that includes evaluation board, embedded software, and PC GUI is available.
For more information contact Anadigm, [email protected], www.anadigm.com
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