Open AccessDesigning a Digital Filter Based Crossover Audio System Using STM32L4
Author(s) -
Mohammad Dicky Nasrulloh
Publication year - 2019
Publication title -
jurnal jaringan telekomunikasi
Language(s) - English
Resource type - Journals
eISSN - 2654-6531
pISSN - 2407-0807
DOI - 10.33795/jartel.v9i4.141
Subject(s) - audio electronics , audio signal processing , audio signal flow , audio signal , digital audio , computer science , digital signal processing , crossover , analog signal , filter (signal processing) , analog image processing , signal processing , electronic engineering , engineering , computer hardware , artificial intelligence , digital image processing , image processing , image (mathematics) , computer vision
Analog telecommunication system equipment is now starting to develop and be replaced with digital telecommunication systems, one of them is in the audio signal processing. The focus of audio processing is audio crossover. Audio crossover in development there are still many who use analog systems. This analog system has disadvantages when adjusting the sound balance because it still uses analog filters to balance it. It is necessary to develop a technology that aims to create a digital-based crossover audio system using the STM32L4, so that by using this digital-based signal processing it is able to adjust the sound more specifically than the signal processing used analog based. This digital filter uses the Finite Impulse Response (FIR) method. Testing audio crossover using STM32L4 produces a digital-based crossover audio system design using a STM32L4 microcontroller with a voltage of 3.3V as power supply, mp3 player as sound input device, FIR filter as digital filter processing, LM386 as sound amplifier and speaker as sound output for crossover audio on rangelow frequency (200Hz to 4000Hz), high (2200Hz to 6000Hz), medium (200Hz to 4000Hz).