All Questions
89
questions
0
votes
0
answers
47
views
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 (...
2
votes
0
answers
29
views
Why the induced noise is sometimes additive but sometimes works as a constant?
Why sometimes the noise (e.g., induced 50hz hum) is added to a useful signal (thus increasing its 50hz value), but sometimes it works as a noise floor - has a static value and can be overpowered by a ...
0
votes
0
answers
59
views
Why does ESP32-LyraT-Mini V1.2 use an external ADC for the microphone when ADC is already available in Audio Codec?
Kindly refer to ES8311 audio codec datasheet and ESP32-LyraT-Mini V1.2 Schematic.. In the Lyrat mini board, an external ADC ES7243 is used to sample the audio signal from the microphone but an equally ...
0
votes
0
answers
72
views
Why does the ES8374 have 5 pins to receive input from a microphone?
I am using a ES8374 codec for an audio application. I am not able to make out how to connect my analog condenser mic (which has two pins) to the ES8374 mic pins. (Refer to pictures from the datasheet)
...
1
vote
1
answer
67
views
DIY project - Listen to Guitar Amp on a USB headset [closed]
I have a Fender mustang GT40 which has a 3.5mm female audio jack connector so that the audio from the amp goes only to the headphones (crucial for me since I live in an apartment). It works wonders ...
- 27
0
votes
1
answer
58
views
Input stage for sampling audio sine wave with ADC
I'm building a prototype, checking the potential for a project.
I want to be able to sample a sine wave from a power amplifier using a Teensy4 ADC.
I have a Teensy 4.0 powering an Evisun isolated DC-...
- 3
2
votes
1
answer
90
views
Grounded ADC pins on the CS4272-CZZR producing horrible noise?
I am currently busy with an audio processing project that requires 4 output channels. I have a Nucleo F303RE running some digital filtering on audio data, which is being read by one of the two CS4272s ...
- 45
0
votes
0
answers
79
views
Getting audio hiss out of my project
I'm trying to build a small audio toy for my daughter. I am using a Raspberry Pi Pico and the C SDK. I am able to successfully play a pre-recorded WAV file stored as a C header file using the DAC and ...
- 1
0
votes
1
answer
1k
views
DFPlayer DAC_R and DAC_L vs SPK
I have a DFPlayer and I want to connect the output of this device to an audio station (which has a jack stereo input - aka aux).
It is unclear for me what the difference is between DAC_R, DAC_L and ...
- 127
0
votes
1
answer
105
views
Different audio sources using analog MUX and ADC
I'm doing a project that the idea is to accept 3 audio inputs: 1 amplified input (27Vpp), a pre amplified input (6Vpp) and a microphone input (About 150mVpp).
Both amplified and pre amplified signals ...
- 11
4
votes
1
answer
874
views
Safely connect audio line level input to ADC
I'd like to take an audio line level signal and feed it into the ADC on a microcontroller (perhaps an rp2040, maybe a nodemcu, haven't decided yet), and feed that into an FFT for visualization ...
- 163
0
votes
0
answers
387
views
Capturing High Speed I2S To SD Card
I've been working on a project that involves receiving two high speed I2S lines and writing the data off of them to an SD card. The interface has the word select and bit clock I2S lines shared between ...
- 51
4
votes
1
answer
375
views
If I invert an I2S data line, it inverts the audio, right?
It seemed obvious to me, but then I read all these audio forums where they're talking about overflow, tones, etc. and I just want to make sure I'm not missing something.
If you take an I2S signal:
...
- 28.9k
1
vote
0
answers
182
views
Capturing High Sample Rate I2S via USB
Recently, I started working on a project to convert my Sony XDR-F1HD radio to a device that I can connect to over ideally USB to record the RF signal off of the air. All demodulation and processing is ...
- 51
0
votes
1
answer
692
views
My speaker connected to my TV is making weird noises only when playing videos [closed]
Apologies if this is the incorrect forum, if anyone knows of a better forum to ask on I would appreciate the redirection.
I have a very specific issue regarding audio playback from my TV. I have a ...
