Questions tagged [audio]
Questions about designing electronics for measuring, processing, and amplifying audio signals.
3,476 questions
-1 votes
0 answers
56 views
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 ...
- 21
2 votes
5 answers
1k views
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 ...
- 469
2 votes
2 answers
304 views
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 ...
- 187
1 vote
1 answer
92 views
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 ...
- 559
1 vote
1 answer
86 views
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 ...
- 113
3 votes
2 answers
360 views
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 +...
- 169
6 votes
3 answers
176 views
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 ...
- 14.9k
6 votes
1 answer
395 views
Distortion on negative slope of audio amplifier
I inherited this PCB, I guess it's a high voltage, class AB amplifier. This is supposed to be the replacement an older version. Here's what the circuit looks like: The input signal looks clean, but ...
- 69