Questions tagged [audio]
Questions about designing electronics for measuring, processing, and amplifying audio signals.
3,477 questions
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Blank Audio using LM393
This is a Tone audio generator. The 4046 generates a tone and TL074 controls its threshold audio.
Please consider the LM393 schematic, its output is 0 or -5V. I want to connect the LM393 to this audio ...
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DAC Schematic Overview
I was wanting a schematic review of my DAC-AMP using the XMOS-XU316 over I2S with a ES9039Q2M. Any input would be appreciated.
The specs of the DAC are:
32 bit
768kHz Sample rate
Here is the full ...
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VCO-based ADC for audio bandwidth
I am designing a VCO-based ADC (the circuit is shown below) for sampling the audio signal.
The design I refered to this post: Low frequency in this VCO design. But I instead of use it as a VCO only, I ...
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Circuit to combine two PWM generated sound signals
I am working on a sound synthesizer using an ATmega328. My synthesizer works for now, and has two voices. Of course I want these voices to be mixed and though I'd use an opamp for that. I have the ...
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2 way speaker crossover design
I am designing my first audio crossover an I would like to have some opinions.
It is for a 2 way speaker with a 8 inch woofer and 1 inch tweeter, here are the schematic and simulation result using ...
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Confusion with transient analysis and initial condidtions in LTSPice
While I was measuring various things in this amplifier design so I could understand it better, I tried to use a square wave as a source signal. I used pulse voltage source, specified parameters and ...
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Rectifying Audio Circuit
I am a bit confused with a circuit I've designed myself long time ago but only simulated on simulink and never built it. Now I've built it on a protoboard and I am getting some considerable deviations ...
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Trying to limit the current going through a transformer coupled to a Piezo Speaker. Why is the speaker louder using an Saturated NPN transistor?
I'm working on a project where I need to update an existing design to resolve an issue with the audio amplifier circuit overheating when the volume is set to HIGH. My approach was to replace the NPN ...
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How is the 4.5V delivered in this charge amplifier circuit?
So I have found this circuit from this website:
https://sound-au.com/project202.htm
As you can see in the picture there is the 9V battery powering the omp amps, but for the +4.5V, how is that ...
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Protect against voltage differences between audio sources
I'm trying to design an audio source and output multiplexer/selector, to play audio from one of a few sources on one of a few output devices (so only one path active at any time). Everything will be ...
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Center channel extraction from stereo audio
My TV audio line level out is connected to a pair of amplified speakers. The system lacks vocal clarity and I want to add a center channel to enhance dialogues. The passive technique is in below ...
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Why is there negative voltage in this preamp circuit
I found this pre-amp circuit for a guitar pedal (i think) and I am struggling with the negative voltage. With my limited knowledge most guitar pedals these days (including all of mine) use a 0v to +...
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Voltage control for Valvecaster overdrive
I'm experimenting with the Valvecaster circuit, using a 12AU7 tube. Trying to add voltage control over the gain pot, I replaced VR1 with an NPN transistor. This works to some extent, but what I find ...
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Understanding an unusual combination of crossover diodes in a class AB amplifier
Another user had a question about distortion in an audio amplifier. The culprit seemed to be oscillations around Q2-Q4. Here it is again for reference:
Not having a lot of experience with class AB ...
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Is this the appropriate way to wire two dynamic mic capsules to an XLR connector? What polar pattern will this microphone have?
I have a Sony F-99S microphone, with two dynamic capsules facing opposite directions. It was originally wired in stereo, with two unbalanced outputs. I am thinking I'll combine them to get a figure-8 ...
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