This will be way offtopic but maybe the combined knowledge here can help:
I have a very old laptop still running Win XP (don't ask) and a cheap external USB soundcard.
I want to input sound via Line In, run it through a DSP, and output this then to Line/HP out. preferredly with low latency.
Is there any freeware I can use on XP for this?
For the background I have to tell a lot more:
I have a Sony WH1000 XM4 NC headphone to block some noise of my neighbours...
I want to watch TV with them. The TV has a HP out, the Sony has a 3.5 mm HP in, that is how I use it. I don't want to use BT and some app etc. This just makes things more complicated...
But I want at least try to get a out-of-my-head experience (because as I said earlier here, with every HP I ever tried, sound is always in my head!)
So my idea is (and I don't know if it really works, so testing with what I have would the first and easy step):
I treat the TV sound as mono (because this particular TV is just 40" and 2.5 m away. Of course I have also my home cinema with 2.7 m wide screen, but this is where I use the A16, not for casual tv viewing)
I plug the Sony HP into the A16 and create an HPEQ. I play pink noise via the center channel of my PRIR using the Sony HPEQ and record the frequency response with an RTA (that also runs on my old XP laptop).
The center is quasi mono, so the frequency response on both ears should be the same (in theory, I know that in practice it is not, but I may just average this)
For the HTRF of a mono source in the median plane, frequency response, run time and crosstalk should be the same for both ears. So I could hopefully neglect runtime of the source to the ears, and the crosstalk should be identical, so I hope that just EQing to the FR of the measured PRIR+HPEQ will do and deliver me a (at least somewhat) out of my head experience.
Before starting to implement this on some standalone DSP etc. I want to try it with the old XP Laptop (and since I don't want to buy any additional hardware I may just go with the old laptop solution all the time I watch TV).
Can anyone follow my thoughts?