One of the possible scenarios for using the Advanced mode is to tweak emulation sets from Easy Mode to your preferences.
How does it work? For example, in Easy Mode, you can select the "Music Studio I - Near" emulation set. You like its sound, but you want to slightly reduce the emphasis on midrange frequencies characteristic of studio monitors that are emulated in this preset. It's easy to do this - you can use the "Tone" equalizer and use the "Mid" controller to adjust the level of mid frequencies.
And what if in the process of work, you do not have enough width of the stereo picture or vice versa, it seems too narrow for you? You can use the settings of the binaural positioning module for audio sources. Use the "Angle" control to adjust the distance between the sound sources in the virtual space.
What if the pads of your headphones were deformed during a long period of operation due to normal wear, and the sound emitters are located too close to the auricles and this led to losses in the high-frequency range? Or vice versa, your headphones have deviations towards high frequencies due to insufficient clamping. The "Pressure" knob compensates for the sound deviation caused by the mismatch of the degree of pressure of the headphones.
The Advanced mode also allows you to control the level of sound reflections in the selected studio control room using the "Ambience" controller. Setting this parameter to 0% will result in a sound without reflections, while 100% will correspond to the measured initial level of reflections.
You also can, if necessary, to turn on/off the modules in Realphones and combine their influence on the sound with each other. One of the scenarios is to leave only the correction of the frequency response of your headphones and the emulation of the speaker system, but without the binaural positioning (HRTF) and other controls.
Another reason why you may need additional settings is the difference in sound between different specimens of headphones.
Despite the fact that headphones of the same model are manufactured using the same technologies and quality control, there are always manufacturing tolerances that can affect the frequency response. This leads to its deviations from pair to pair, as well as to the difference between the left and right speakers. The spread between instances can be up to 6 dB (±3 dB) - this is a noticeable difference. Because of this difference, the standard correction profile may not work perfectly with some examples of headphones of the same model.