1. Overview of the Overall Design Scheme This design uses the STM32F103C8T6 as the main control chip, employing the HC-05 Bluetooth module to achieve wireless audio reception. The VS1053B audio decoding chip is used for MP3 format decoding, combined with button control and LED status indication, to construct a low-cost clone Bluetooth headset system. The … Read more
1 Introduction In the field of microcontroller development, 8-bit microcontrollers are the ideal choice for electronics enthusiasts due to their low cost, relatively simple structure, and ease of programming. This article introduces how to use an 8-bit microcontroller to play music. The project is programmed in C language to play audio files, and includes circuit … Read more
The booming development of the live streaming economy has created a huge demand for high-quality audio equipment. According to the 2025 China Sound Card Industry Market Research Report, the rapid expansion of applications such as live streaming economy, short video production, e-sports industry, and remote work has driven an increase in demand for high-fidelity audio … Read more
In chips, the NPU (Neural Processing Unit) and DSP (Digital Signal Processor) are two core components with different roles, driving audio devices from traditional signal processing to intelligent upgrades. 1. Core Role of NPU in Audio Chips The NPU is optimized for neural network computations and primarily undertakes edge AI tasks, specifically including: Voice Interaction … Read more
2025.10.06, Mid-Autumn Festival. In stark contrast to the drought in the first half of the year, after entering September, Henan has been experiencing continuous rainfall. On the sixth day of the National Day holiday, including today, it has rained for five days. While organizing the files on my computer, I found two old MATLAB scripts … Read more
Bluetooth’s wideband voice calls differ from narrowband voice primarily in the sampling rate, which increases from 8k to 16k, and the codec changes from CVSD to mSBC (modified SBC). The HFP (Hands-Free Profile) related to Bluetooth voice calls strongly recommends using a packet loss concealment (PLC) algorithm during wideband voice calls to ensure voice quality … Read more
DSPPA Phased Array Sound System / Meragang Mosque, Brunei Facing the unique acoustic environment of Meragang Mosque, DSPPA’s phased array sound system was implemented with the support of its agent, Comtech Trading Co., to deliver focused sound coverage and enhanced clarity. 01 Project Overview Phased Array Sound System @ Brunei Meragang Mosque, officially named Masjid … Read more
Click the blue text to follow us (The following content is organized by the Beijing Integrated Circuit Society) Definition and Basic Concepts A Digital Signal Processor (DSP) is a microprocessor specifically designed for digital signal processing. It primarily processes digital signals, which can be various forms of discrete-time signals such as audio, video, communication signals, … Read more
This article demonstrates how to implement recording and playback functionality using Python scripts on the IDO-SBC3968 Ubuntu system. The IDO-SBC3968 features the RK3399, a high-performance six-core 64-bit CPU, supporting 4K HDMI2.0 display, with rich interfaces, including Gigabit Ethernet, full-protocol Type-C, USB3.0, eDP, and dual-channel LVDS screen interfaces. It supports 4G/5G modules and Wi-Fi/Bluetooth, 6-axis G-Sensor, … Read more
Technology is rapidly developing today. In this article, we will delve into the principles and structures of Bluetooth modules and their advantages compared to other products currently available in China, hoping to provide some help to everyone. As a short-range wireless communication technology that replaces data cables, Bluetooth supports point-to-point and point-to-multipoint communication, wirelessly connecting … Read more