Is there any formal name for audio codecs? My lecturer said today that audio codec is a jargon and I should not use these words in my diploma, unfortunately she did not tell me if there is a proper name. I was surprised because it is so widely used in datasheets.
Electronic – the proper name for ‘audio codec’
audioterminology
Related Solutions
Phantom power, as I understand it, runs at about 48VDC, max, and XLRs aren't rated to stand off 500 volts, so that's not a viable solution.
If you need frequent connection and disconnection, my druthers would be to opt for terminal blocks on the speakers which would accept the stripped and twisted ends of the cables.
I was having the same problem. I tried a few grounding strategies to no avail. I then looked at the application notes for the Texas Instruments TPA3116 amp and noticed that they recommend decoupling capacitors of at least 100uF near the power pins on both ends of the chip. These caps are absent on this board.
Looking around eBay, I noticed one that doesn't have the big caps on the TPA3116 either, but it has a 10uF cap on the power pin of the op amp. I had one lying around so I soldered it between the resistor it sits next to and the ground plane and now I consider the amp usable.
I used a 10uF 16V cap because that is what I had. The board on ebay uses a 50V cap. Because the op amp runs at 5V, that seems like overkill.
I will probably add the recommended caps on the TPA3116 to see if I can reduce the little remaining noise and maybe help the low end a bit.
For clarity, here is a pic of the cap I added:
The wires are my failed attempt to solve the problem by directly connecting the op amp and the bluetooth module grounds to the TPA3116 ground.
Others have noted the same issue, even when powered by batteries.
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Best Answer
Codec is the proper name. It is also jargon in that laypersons do not know what it properly means.
Codec:
Jargon:
If you want to avoid the jargon, either explain what a codec is or simply refer to it by its definition.