Implementasi Audio Equalizer Digital Grafis dengan Digital Signal Processor Board OMAP-L137

Pranjoto, Hartono, Lestariningsih, Diana and Suryadinata, Adrian (2017) Implementasi Audio Equalizer Digital Grafis dengan Digital Signal Processor Board OMAP-L137. Jurnal Elektro. (Unpublished)

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Abstract

A digital audio equalizer is implemented using a Digital Signal Processor Board OMAP-L137 with display using a computer monitor with digital control. Traditional audio equalizer with sliding buttons is replaced with a display on a computer screen that is similar to a traditional equalizer-look. The equalizer designed here is a 2/3 octave audio equalizer with left and right audio channel designed in accordance with the standards set forth in ISO 266 1997, IEC 1995 and ISO 61260/1260 3 1973. The standards also mentioned wide band every frequency channels with a bandwidth of bandpass filter with a -3dB at strengthening maximum / minimum +/- 6dB on any frequency channel (left-right independent). The equalizer main component is bandpass filter with a center-predetermined frequency based on standards for the bandwidth of which have been determined in accordance with ISO 266 and so on as mentioned above. Determination is to use the ribbon width of -3dB attenuation on both sides of the bandpass filter, which was also mentioned in the standard. Implementation bandpass filter is to use a Butterworth filter of order 1. The transformation from Butterworth 1st order low pass filter 1 (analog) into a first order bandpass filter (digital) is bilinear Z-transform. Implementation of the digital filter is a signal processor from Texas Instruments with SDK module OMAP-L137 processor from Texas Instruments which is able to perform calculations quickly to a digital signal processing system. Every computed bandpass filter will be evaluated fir is amplitude, phase response and bandwidth. The result of the computation for each bandpass filter in general and final implementation will be presented. The performance of OMAP-L137 to handle all the filters without any problems will be presented

Item Type: Article
Uncontrolled Keywords: equalizer 2/3 oktaf, digital signal processing, OMAP-L137, TMS320C674x
Subjects: Engineering > Electrical Engineering
Divisions: Journal Publication
Depositing User: Ir Hartono Pranjoto,Ph.D., IPU
Date Deposited: 27 Feb 2017 08:19
Last Modified: 27 Feb 2017 08:19
URI: http://repository.ukwms.ac.id/id/eprint/10426

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