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Audio equivalent to QR code

A similar idea (sometimes called “data over sound”) was the Chirp technology. A mobile app was provided which could send and receive data via audio (speaker/microphone). With a data rate significantly ...
Yushin Washio's user avatar
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Is there a sound quality difference between RCA (analog) and optical (digital) connections?

for long analog runs, baanced connection is best, IF BOTHcmpnents have TRULY balanced output-input/connectors - usually cannon XLR - 3 pin , per channel. should be completely free of losses,hum, RF ...
user37753's user avatar

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