All Questions
Tagged with audio microcontroller
96
questions
0
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44
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Audio Codec Input/Output Channel Stages
I am planning to build a PCB for a Eurorack Modular Synthesizer, incorporating an STM32 for DSP and a bidirectional Audio Codec like the TLV320AIC3104 to handle the ADC/DAC.
Eurorack audio signals ...
- 1
1
vote
0
answers
65
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How to generate a 50-100 Hz 12 Vac sine wave for audio tone from 5 VDC (PB0 pin) atmega164p microcontroller [closed]
I have programmed to ATmega 164P to make PBO high when PC1 is low. In programming, I'm adding other peripherals as well.
But I am facing one issue regarding generating a tone. I have drawn low pass ...
- 11
0
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0
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75
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PAM8403 weird clicking / banging noise
I'm using an ESP32, a PCM5102, and a PAM8403 to output a 3.5mm Audio Jack output.
In my circuit, I'm sending the Audio Signal via I2S to the PCM5102, where a quieter output can be picked up. If the ...
- 1
0
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0
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47
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EMF Coupling from microSD writes
Looking for some pointers. I am having an issue with noise coupling into the onboard ADCs while writing to a microSD card. Audio from an pre-amp at 46.875 ksps
I am using a SAMD51 microcontroller (...
3
votes
4
answers
347
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Likely source of noise, given circuit is quieter connected to a PC?
My circuit has a digital and an audio part. The audio part is quiet when the uC is connected via USB to a PC, and a bit noisier when they're disconnected. What is the PC doing to reduce the noise, ...
- 289
1
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0
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146
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What is SAI frame synchro?
The SAI interface, as used by ST and others, includes some options which I have not been able to find any explanation of. Justme's answer provides a great explanation of frame, slot, and data size; I'...
- 1,135
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votes
2
answers
198
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Can I capture audio over SPI on from the onboard MEMS microphone?
I have a STM32H735G-DK Discovery board and would like to record audio from the onboard digital MEMS microphone, a MP34DT01TR-M which provides PDM audio.
It would seem to me the simplest way to do ...
- 1,135
1
vote
1
answer
93
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TRS balanced audio jack insertion indicator
I'm transmitting analog audio signal from BM20 bluetooth module (it has single ended audio out L + R), to amplifier TPA3118D2.
I wish to add two TRS 1/4 balanced audio output jacks (separate for L and ...
0
votes
1
answer
203
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How do I get rid of a PWM signal from ground?
I'm working on an effects pedal design that uses a microcontroller to control on/off state as well as 2 LEDs. The microcontroller code uses a PWM square wave to control the lights, and the PWM is ...
0
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161
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My class D amp not working?
I'am trying to make class D amp from GreatScott youtube channel but it doesn't work. When I connect the headphone jack and play some music to test it, the speaker starts vibrating, the hight side ...
- 11
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votes
2
answers
438
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How does one convert DC to AC in context of playing audio?
I'm working on a little gadget. A simple two button mini game with a simple oled i2c display. I wanted to add sound and a bit of music. Nothing too fancy, mainly drums using white noise and two or ...
- 11
0
votes
2
answers
115
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Simple data over sound solution
I'm designing an access control and I'm evaluating different technologies to make the device unlock the access.
One of the technologies I'm studying is integrating a microphpone in the device and ...
- 143
0
votes
0
answers
172
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Suitable I2C Alternative for Audio Applications
I've been looking at using a MCP4725 12-bit DAC connected to a TPA2016 audio amplifier to drive a small 0.5W loudspeaker from a ATtiny85 on an existing circuit I have. I've quickly realised that the ...
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-3
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2
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138
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Looking for a high-perfomance MCU for my thesis. The idea is to programme a digital processor that emulates tube amps in the best way possible [closed]
I've read papers that used the PSoC 5LP but the writers felt their hands tied by the limitations of the board. I wanted to step it up in the hardware department without busting a bank because the idea ...
- 1
-1
votes
1
answer
99
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Need help with low power audio amplifier circuit [closed]
I intend to output an 8-bit waveform generated on an ATtiny1614 microcontroller running at 3.3 V to a 1-2 W, 4-8 ohm speaker and have the user able to change the volume.
For that, I am thinking about ...
- 13