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Questions about designing electronics for measuring, processing, and amplifying audio signals.

1 vote
1 answer
173 views

How can I easily inject a tone from a DAC into an XLR audio signal?

I'm looking for the simplest way to add another mono audio signal to the line. I've got a sine tone generator and want to "add" it to the microphone signal (and still hear the microphone). … Audio quality is not super important since it's just a tone. I'm more interested in the lowest parts count solution. …
user11015833's user avatar
1 vote
2 answers
222 views

Simplest option for generating audio tones?

I'm looking for the simplest way to generate audio tones. Something like a square or sine wave, but I want multiple tone options. For example, two quick beeps, one at 440Hz, one at 1Khz. … The audio signal must be a mic-level signal. Is some kind of MCU unavoidable in this situation? I've yet to find a suitable solution that covers all those bases, so any help is greatly appreciated! …
user11015833's user avatar
0 votes
1 answer
381 views

How do I slowly short pins 2 and 3 of a phantom powered mic signal?

Shorting pins 2 and 3 of a microphone signal will mute it and is acceptable for when phantom power is present. I can do this with a regular switch, or a solid state relay. But is there a simple way to …
user11015833's user avatar