24 bit 48000 Hz is the maximum supported by FxSound, so if you want to use this free software, please make sure all your devices match at the same frequency setting.
I can assure you, this is more than enough; the frequency range of 96 kHz recordings extends up to 48 kHz, while human beings are only able to hear sound up to 20 kHz, so it is simply a myth that setting or recording your audio at 96 kHz delivers better quality sound.
Furthermore, 99% of all content available online does not even support that sample rate, and most audio devices don’t, either.
I added your desires to our existing EQ thread, which you can find linked underneath your opening post.