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Unisian Bluetooth Mp3 Player Digital Audio Decoder Board Volume Control Usb Tf Bt Fm Line In Music Lcd Lyrics Display Recording - Digital-to-analog Converter (dac) - AliExpress
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Amazon.com: SparkFun MP3 Trigger - 18 Trigger inputs to Alternate Functions Random & sequential Track Selection Transport Controls Even Volume up/Down Real-Time Volume Control Full-Duplex Serial Control : Electronics
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