A good way of hearing the gras grow is a null test.
Take unprocessed audio and process it. Then take both the processed and unprocessed audio and add them to your audio software (e.g. Audacity). Now flip the polarity of one of the audio signals.
This allows you to listen to the difference between the two signals and if there is nothing there, guess what, they are the same or the differences are so small that theg are inaudible.
This is a great way to anger people with expensive hifi gold cables, because what is true in the digital also works in the analog.
You only need to make sure both ajdio signals are at the same level (by minimizing the level of the difference).
Take unprocessed audio and process it. Then take both the processed and unprocessed audio and add them to your audio software (e.g. Audacity). Now flip the polarity of one of the audio signals.
This allows you to listen to the difference between the two signals and if there is nothing there, guess what, they are the same or the differences are so small that theg are inaudible.
This is a great way to anger people with expensive hifi gold cables, because what is true in the digital also works in the analog.
You only need to make sure both ajdio signals are at the same level (by minimizing the level of the difference).