u/GaaJarbhai

What are is this IC and can i use it for my projects?

I just finished building my second version of my headphone amp.
I got the basic circuit design from here, https://www.instructables.com/Make-a-Headphone-Amp/ .
So the initial design had a voltage divider using two resistors, but for this one i used another ne5532 to make a buffer. I added two pull down resistors to avoid floating inputs which was a problem with my first amp. Then i also added 10k resistors at the output to reduce the pop in my iems when i first connected them to the jack. The pop intensity has reduced but it still has a louder pop than when i connect the iems to my pc jack. How can i reduce the pop?
And if you guys think there can be some improvements made please let me know.
Also please tell me if this is overall a good design or not, this is my 3rd time seriously making a project that i want to be using daily.

The first picture shows you the headphone amp part. It is seperated from other parts of the project like the teensy etc, so this amp gets its own power. The ground of the teensy and the amp are not connected. I am using the pcm5102 dac to output the audio, I have also used the uda1334 for this very project but I heard that the pcmis better so I used it. And the following problems occur with both of the dacs.

Here is the problem I'm facing:

I connect power and my eaprhones and there is a slight noise, probably because the wires move and stuff but that's fine. The main problem is that when I connect the teensy to my pc so that I can actually hear stuff the amp starts ringing (somewhat like motorboat) , but when I disconnect the teensy it goes away. When I connect the amp to my phone while the teensy is not powered there is only that hissing and no ringing.

Then what I did was I connected the output of the pcm to my other amp I built (3rd picture) and guess what there is no ringing. That amp outputs fine although it has some noise that is just because of poor grounding or loose connection.

Hello guys, I just finished the audio part of my project, built a headphone amp using ne5532. I copied the circuit diagram of a cmoy circuit from instructables. The audio works great but when I connect them to the speakers, I can hear very low static hiss. How can i remove that?

This is actually the second time I'm doing this circuit on this very PCB. The first time I did it, there was only bass outputting and no higher frequencies. Everything sound muffled. I wasn't able to figure out the problem and still don't know what the problem was. If you guys have any idea please let me know, I will keep it in mind for my future projects : )

Hey everyone, been soldering for a long time but still looking for any improvements I can make. I use a 25w soldron iron nothing special. How is it?

I just finished the basic working of a 6 band equaliser with one volume knob using rotary encoders. So when I connect the teensy to my pc, the pc recognizes the teensy as a midi so that's fine but there is no audio output until and unless I move 5 of the rotary encoders responsible for controlling gain of each frequency band. When I tried using a very simple code, just outputting audio coming in, there is no delay in the output. When I say this I don't mean lag, I mean that until I move 5 knobs there is literally no output. Can it be by any chance an os bug cuz I'm on linux xfce.
Code is here : https://gist.githubusercontent.com/NandoBhan/e790487c76d5d51056b3952460465a41/raw/