Beta version 1.7.0.11 has the improvements as described in my previous post.
If you will you can download beta version 1.7.0.11 from my Dropbox. Copy the downloaded Peace.exe to c:\program files\equalizerapo\config, overwriting the existing executable file.
I've managed to get the tremolo in, not by adding it to the sine sound wave but rather by actively changing the sound volume. Adding tremolo to the sine was problematic (clicks by non-matching sound waves). This active solution will very a little per computer but I think it's good enough as a beneficial feature. Unfortunately 10 Hz isn't possible as that's too high. Currently the frequency is quite low: 3 Hz, but still I can hear this fluctuation at a lower volume better in contrast to a non-tremolo...
Does it work on any of the main audio devices of your laptop? If so, then probably Equalizer APO isn't working on any of the devices. This can be a few things (which aren't likely on their own but at least they can be checked): The Windows update feature "Get the latest update as ..." is enabled. Or worse, the "Windows Insider Programme" is enabled. Early updates aren't any good ... An anti-malware app blocking access and/or change to the Windows registry. An anti-malware app is setting the DisableProtectedAudioDG...
Reading your experience did you install Equalizer APO in c:\program files\equalizerapo? It seems that's the best choice (preventing rights issues on the Equalizer APO audio manipulation engine, the actual APO). However, I'm not sure if it resolves the issue about none of the APO techniques working on the Apple Dongle but at least try it.
When having an overlay on the graph the save graph feature accidentally included parts of this overlay in the saved png file. I corrected this. Btw. The internal draw function is used for drawing to the screen and for drawing to the png file. This caused the bug which was an oversight by me. I didn't expect a save action when having an overlay. I see a tiny y offset (0.5 pixel) when reversing an overlay graph line). Is this what you're talking about? If so, I'm not sure if I can do anything about...
I like your idea so I've put it on the Peace wish list. Thanks for bringing it forwards. Currently the sine waves (samples) are generated when accessing the Test interface. This was the most convenient and fastest way I could find for AutoIt, the programming language Peace is built with. At the moment I'm not sure how to implement your tremolo waves idea. It should be a matter of generating the sine waves with a sine wave of 0 to 5 Hz on top. Anyway, I'll look into to it.
Unfortunately this kind of issue is difficult to solve. But first you need to check if Equalizer APO stays installed on your microphone. In the Device Selector app install Equalizer APO on your microphone and click the "Ok" button. Then restart your computer and check in the Device Selector app if Equalizer APO is still installed on your microphone. If so then at least the issue isn't related to that. Spanish translation through Google Translate: Lamentablemente, este tipo de problema es difícil...