All Questions
89
questions
0
votes
0
answers
66
views
Looking for feedback on audio schematic [closed]
I'm making an mp3 player and I'm looking for feedback on the audio side. It takes an i2s input from an esp32(not in this sheet), and outputs to a headphone jack. This is my first audio project (...
- 11
0
votes
2
answers
99
views
Driving speaker with differential driver
I am designing an battery powered device (3.6-4.1 V regulated down to 3 V) which plays audio recordings through a speaker (8 Ω, 0.3 W). I want to drive the speaker by applying two differential inputs, ...
- 135
2
votes
2
answers
593
views
Random noise in speaker with ESP32+DAC+Amplifier
We are facing the following issue with our application board based off ESP32 module.
We are using PCM5102 from TI as a DAC running over a I2S interface. The DAC is connected to the TPA3136 amplifier ...
- 29
1
vote
1
answer
90
views
Which signal should be fed into the single ended input of the PAM8320?
I'm feeding audio from this DY-SV17F module into this PAM8320 amplifier.
The configurations I believe I can choose from are:
1: Feed either DACL or DACR from the module to the amplifier.
2: Combine ...
1
vote
0
answers
64
views
What op-amp can I use in this output filter recommended design?
I'm working with the Cirrus Logic CS42448 codec and would like to implement an active filter output to differential audio signals.
The output should be line level to be connected directly to external ...
- 423
0
votes
0
answers
39
views
Will a common mode choke and a FET switch cause issues in this circuit?
I have a 12v 5A generic switch mode power supply which I use to power my USB DAC for streaming music through my PC to an amplifier and speaker combo. I have discovered that adding 6 x low ESR 4,700uf ...
- 101
0
votes
0
answers
127
views
Determining values for active low-pass output filter for DAC
I'm trying to use a PCM1780 as DAC for my audio circuit. The datasheet shows the following recommended output schematic for this DAC, for which I'm trying to choose component values (because they do ...
- 1
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
158
views
Audio: Can I use a stereo-amplifier with a mono DAC?
Here a schematics of my project:
There is only one speaker (the sound is mono)
The DAC I will use is a mono DAC, its reference is ES8311 and its datasheet is here: URL. It has two ouputs: OUTP and ...
- 519
0
votes
2
answers
438
views
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
0
answers
174
views
Audio noise on output of PCM1789
I am developing a Bluetooth adapter to be able to listen to music from my phone in my car. I am doing that with ESP32, from which the audio data is sent to PCM1789 which converts it to the analog ...
- 3
0
votes
1
answer
39
views
Component in series with digital communication lines
What is the component highlighted in picture?
Main IC in the picture is PCM510xA.
- 551
1
vote
0
answers
71
views
Best way to output n digital signals using n-1 DAC channels
I have 3 digital signals that need to be mixed and output into the analog domain. My DAC has 2 channels (Left and Right).
The way I see it, I can:
mix the signals 1, 2, and 3 digitally and output ...
- 11
0
votes
1
answer
241
views
Headphones on a line output (vs. headphones output)
I'm designing a device using a DAC (TI PCM 2704 like this one to be precise,) and optionally a headphones amplifier.
I noticed that connecting (32 Ohms, closed-back Beyerdynamic) headphones to the ...
- 1,946
0
votes
0
answers
94
views
Why is my voltage pulsing when using a DAC as an input to an OTA?
I'm using the LM13700 in an automatic gain control configuration to adjust the volume of a speaker based on the audio level perceived by the microphone. Both amplifiers on the chip are used: one to ...
- 1