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How do people able to tell a high quality MP3 (frequency go up to 20khz) sound worse than a lossless audio since human can only hear close to 20khz frequency ? How can I find out if a FLAC is genuine or not upconverted (other than knowing the source of ...
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Amazon.com: SHANLING M1s MP3 Player ES9038Q2M DSD MQA DAP HiFi Audio Player Bluetooth/WiFi/USB Input 3.5mm/4.4mm Headphone Output (Silver) : Electronics
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