🔊 KT7066 + KT404C Hybrid Wireless Audio System



🏭 Advancing Modular Audio Solutions
KT7066 wireless mic + KT404C MP3 decoder:
• Cross-protocol interoperability
• Shared AUX resource management
• OEM-customizable firmware
Proving seamless integration wins
#AudioTech #EmbeddedSystems

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Jieli Bluetooth Smart Speaker Development: Common Issues with AC696N SoCs

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During the development of Bluetooth smart speakers using Jieli's AC696N series SoCs, developers may encounter several common issues. This article summarizes these problems and provides corresponding solutions to help streamline the development process. 1. AC696N V1.7.0: Unable to Display SDK Version Number via Test Box When TWS is Enabled Problem Description: After enabling TWS (True Wireless Stereo) in AC696N V1.7.0 SDK, the test box cannot display the SDK version number. Solution: Register a new callback function to handle the SDK version information request. // Re-register a callback function bt_testbox_ex_info_get_handle_register(TESTBOX_INFO_SDK_VERSION, user_bt_get_sdk_ver_info); // Callback function example: u8 user_bt_get_sdk_ver_info(u8 len) { y_printf("Getting version number\n"); const char *p = sdk_version_info_get(); if (len) { *len = strlen(p); } log_info("sdk_ver:%s %x\n", p, *len); return (u8 *)p; } After Modification: The SDK version numb...
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KT148A Voice Chip: A Powerful Tool to Enhance the User Experience of Smart Soymilk Makers

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The KT148A voice chip from Qingyue Electronics significantly enhances the user experience of smart soymilk makers with its unique advantages. It has a large - capacity voice storage space, allows users to change voices by themselves, features a low - power design, and can be reprogrammed. Smart soymilk makers emerged from modern people's pursuit of a healthy lifestyle and a convenient home life. In the fast - paced urban life, soy milk is popular among consumers of all ages due to its rich nutrition and easy absorption. With the advancement of technology and the popularity of intelligence, smart soymilk makers not only meet the demand for a healthy diet but also integrate elements of convenient operation and intelligent experience. The KT148A voice chip adds a voice - broadcasting function to it, further improving the user experience. The KT148A is a 32 - bit DSP voice chip with a standard SOP8 package. It has an internal 420KByte voice space, can support a maximum voice length of ...
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KT148A Voice Chip Issue: Difficult to Play with Code Sending - Normal Playback After Grounding Pin 4, What’s the Reason?

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Problem Description: Hello, we’ve encountered an issue and would appreciate your support: With the KT148A chip, after powering on, sending the code rarely triggers playback. However, if we use tweezers to briefly short Pin 4 (PB0) to ground and then send the code again, playback works normally. What could be causing this? Based on the observed behavior, it’s highly likely an issue with the timing of one-wire communication,  particularly with the start signal, which may be too short.  Let’s analyze this in detail and review the KT148A schematic as follows: 1. Pin 4 (PB0) of the Chip: PB0 is a test pin with the default factory function of triggering wake-up and playback when grounded. 2. Customer Description: When the customer uses tweezers to short PB0 (Pin 4) to ground, it follows this principle. The shorting action actually performs two operations: Action 1: The KT148A detects a falling edge signal, wakes up, exits low-power mode, and enters full-speed operation. Action 2: Th...
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