Application development- Sound Equalizer adjustment - Classy Sound

You need to develop an application for smartphones (both android and apple) that disables the top loudspeakers while forcing the sound to come out on the bottom speakers of the cellphone which have speakers on the bottom and top as well. In addition you need to integrate a given sound equalizer setting into the app that will apply automatically to the user's smartphone when the app is running. With the smartphones that do not have dual speakers the app only will apply the preset equalizer settings. Regarding the design of the app we will provide it for the one who we choose to work with.