Questions tagged [audio]
Questions about designing electronics for measuring, processing, and amplifying audio signals.
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My BJT audio amplifier circuit isn't working as expected
I am trying to design an audio amplifier circuit using BJTs.
These are the requirements of the circuit:
Input signal: 50-100 mV (It's the output of my iphone's microphone.)
2 W - 4 ohms speaker
There ...
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23
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3
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DC biasing audio signal
I have seen a few different ways of adding DC bias to an audio signal. I have simulated them and they all give me similar results, but I can't figure out why choose A over B or C. My audio source will ...
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What is it that strips vocals from audio when a 1/8" audio jack is partially unplugged?
Every once in a while, my eighth-inch audio jack will slip loose and I'll seemingly lose only the voice part of a track -- leaving somewhat of a "karaoke" version. What I would guess about how audio ...
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What is the voltage range of a standard headphone jack from a phone?
I want to connect the output from the audio jack of an iPhone to an Arduino.
What voltage range can I expect to see on the audio lines from the iPhone? I assume that turning the volume up on the ...
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25
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Single supply op-amp audio amplifier
I am trying to create an op-amp amplifier that would work from single 5V supply, and would be able to amplify -100mV to +100mV audio signal to around a 1V peak-peak or so. I've came across this ...
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How does the phone detect if 3.5 mm jack circuit is closed?
I have an android phone to which i have plugged an earphones. So at the top of the phone, I get the headphone symbol which indicates that the earphone is connected (In other words, the circuit at the ...
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How important is impedance matching in audio applications?
How much will reflected signals matter in audio applications (say between an amp and a speaker, or a pre-amp and an amp)? Mostly with regards to fidelity and not power transfer.
What are the ...
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What makes a "balanced" audio signal?
What is "balanced" audio exactly, and why is it useful? I've read that it means there are two voltages, with one being the inverse of the other. A balanced audio receiver looks at the difference ...
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7
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How to connect one Android mobile audio output to the microphone of another Android mobile?
This question is to help the "hard of hearing community" so that they can READ the phone/mobile call because they can not hear it.
Android has some really good (and free, too) apps which can ...
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What's the best cable to transfer audio signal?
Sorry if this is the wrong place but I'm interested in a scientific and electrical explanation and not some HiFi voodoo magic.
I guess you all have seen the discussions about expensive audio cables ...
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Using a microphone with an Arduino
EDIT: I have been investigating in this problem for quite some time. It turns out to be a way more difficult project than I thought and not something for beginners. This requires expensive hardware (...
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Naively mixing two (or perhaps more) audio signals
this is my first question and I am very much a beginner in electronics so I apologize if this is a too stupid question.
I have Atari punk console and another small homemade audiomaking circuit. These ...
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3
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What component to use for audio signal switching?
I'm looking to build a guitar pedal switcher based on a Raspberry Pi or Arduino (have not yet decided, but I have an unused Raspberry around and I lean towards that). Anyway, digital logic.
Now, I ...
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Ground loop? Switch mode power supply noise
I have a single 12V supply powering a 12V class D audio amplifier (Tripath TA2020 based, model 'SMSL SA-36') (C) and a very cheap 12V to 5V 2A rated switch mode converter (A). The 5V is used to power ...
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line-level audio into an iPhone headset jack?
What level and/or impedance matching (or pre-amp) circuits should be used to send a line-level audio signal into the mic input ring of an iPhone headset jack with minimal distortion and/or loss?
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