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This is a bare 12V sound playback board built around the CH9311-FL chip, with 8MB of onboard storage and a 20W amplifier output. It plays MP3 files decoded in hardware and can be triggered by up to 10 buttons, by background IO signals, or in combined playback mode. It suits makers and installers building voice prompts into industrial broadcast devices, kiosks, displays or props. Compared with simple trigger modules, it offers far more control modes and combination playback, but it is a component, not a finished speaker: you supply the speaker, power and enclosure.
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This is a 20W sound playback board with 8 MB of built-in storage, built on the CH9311-FL chip. It decodes MP3 audio in hardware and has a 10-way trigger input. It is designed for industrial broadcast and voice prompt devices.
Audio files transfer to the board over its USB interface with a USB cable, which is included. Files must be in MP3 format, and each file name must be 5 digits, from 00001 to 00010. The 10 trigger ports give 8 selectable playback modes, such as single loop, loop playback and snap trigger playback. Control modes include 10-way button one-to-one, MP3 mode and combined playback. Combined playback supports up to 1023 audio segments, power-on broadcast and background music insertion.
Volume is adjustable: it decreases clockwise and increases counterclockwise. The board has a dedicated BUSY signal output. Listed uses include industrial voice prompts, workshop operation prompts, equipment inspection prompts, voice alarms, mine and oil field voice horns, and car reverse and voice horns.
