Good advice!

I was almost about to give up, but now I found a workaround (after first deleting stuff from the registry and re-installing PD to get it back to working): I tested if the signal coming from my mixer is fine by recording it... and it was, so I had the (pretty obvious...) idea to use the Tape In of the mixer for returning the signal instead of the USB port. Although I don't like the thought of using my internal soundcard and a cheap mini jack output, at least it works now... So, in ASIO4ALL I selected only the input from my mixer and the 2nd output of my soundcard... aaand my patch finally works. Fingers crossed that this will be stable in the future.
So, I found a solution on my own finally, but the "moral support" was still really important for not desperately giving up already a week ago. Thanks!
If there are any other ideas coming to mind, feel free to suggest them. I would still be happy to use only USB...

There are differences (I do not need to tick the Hardware Buffer option for example), but the settings for Reaper definitely do not work for PD. Today things actually got worse again and PD is just shutting down immediately when I toggle the DSP while having ASIO4ALL selected... :/ currently re-installing PD to see if I can at least go back to where I was.

None of the settings has any influence on the unwanted sound so far...

I hope you can open this: ASIO trouble.zip

Thanks again for taking the time.
The clicks I hear are not affected by changing the delay/latency setting in PD I think. I already found out that 2ms is not working with my cheap laptop (then I get different kind of clicks and distortion...), but these different clicks disappear at around 10ms which is fine for my purposes that will not involve super exact timing.
I wanted to wait until tomorrow but as I am anyway answering, here is how the clicking sounds that I am talking about. It is not distorting the signal but rather added on top... kind of musical but not what I want at the moment :D
test tone with clicking.MP3

update: I finally got some sound after ticking the "Hardware Buffer" option (which is at the same spot as the "Allow Pull Mode" with other devices). I still have a weird clicking as soon as I play the test tone (which is different from the clicking I get for too low latency settings that the CPU cannot handly). I will take some more time tomorrow morning to try everything I can think of myself before I bother you with recordings of the clicks or screenshots etc. ...

@whale-av thanks! Most of that I already took into account having read your advice to others on this forum I havent tried changing the amount of channels. I have always set it to two channels in and out which should be fine, I will try higher numbers though and make screenshots if it is still not working.

Hello!

I hope this is the right place to ask this and not too specific, but nothing I have read here and elsewhere on the internet could help me solve my problem so far.

I am running PD vanilla on a laptop with Windows 10 and want to use it for live performances in the future. As an audio interface I am using a small Peavey USB mixer (PV6 USB). It is a class compliant device and I am already using it with ASIO4ALL and Reaper for quite some time without any problems, but I am not getting it to work with Pure Data the way I want to.

I am using the same sample rate and buffer size settings, but I do not get any sound - only cracks and an immediate red exclamation mark from ASIO4ALL in the control panel.
The weird thing is that ASIO, Reaper and my mixer are working just fine in combination, as well as MMIO, Pure Data and the mixer (and ASIO, Pure Data and the built-in mic from my laptop also work together) . Every possible combination works, but not the one I want to use...

Does anyone have any idea what else I could try besides getting a different interface? Or is there any other option for stabel low latency audio on Windows besides ASIO4ALL? (I have also tried JACK2 but this did not help because I was still using ASIO4ALL and only routing it via JACK)

Thanks!