USB Audio Player PRO stands out with its extensive format support, including WAV, FLAC, MP3, MQA, DSD, and SACD ISO, among others. It completely bypasses the Android audio system to deliver native playback at resolutions up to 32-bit/768kHz, depending on the connected DAC's capabilities. This ensures pristine audio quality without any resampling artifacts.

The app includes advanced functionalities such as gapless playback, ReplayGain normalization, synchronized lyrics display, and a 10-band equalizer. With optional in-app purchases, users can access additional features like ToneBoosters' parametric EQ, MorphIt headphone simulation, and MQA Core decoding. Network playback via Samba, FTP, and WebDAV, along with UPnP/DLNA support, provides flexible media management options.

Unique to this app is the ability to capture and play audio from other apps through its high-quality USB audio driver (Android 10+). It also allows adjusting Bluetooth codec settings and sample rates on compatible devices, making it an indispensable tool for audiophiles seeking uncompromised sound quality across various audio sources.

USB Audio Player PRO offers an extensive music library that supports a wide range of audio formats beyond the standard Android offerings. This includes but is not limited to wav, flac, mp3, m4a, and even high-resolution formats like MQA and DSD.

The application ensures copyright authenticity by providing users with the ability to play files directly from their storage without any unauthorized modifications or distributions. It respects user ownership of legally acquired music files and enhances the playback with its superior sound engine.

With support for HiRes audio chips found in many modern smartphones, users can enjoy their high-quality audio collections at their intended resolution. The app bypasses typical Android audio limitations, allowing audiophiles to experience the full potential of their music libraries.

When it comes to audio quality options, USB Audio Player PRO stands out by offering native playback up to 32-bit/768kHz or any other rate/resolution your USB DAC supports. This completely circumvents the Android audio system's limitation of 16-bit/48kHz, ensuring pristine audio quality.

The app also features advanced audio processing capabilities such as DoP, native DSD playback, and DSD-to-PCM conversion. These features cater to enthusiasts who demand the highest fidelity in their listening experience.

Additionally, the inclusion of a 10-band equalizer, upsampling options, and Toneboosters MorphIt Mobile for headphone simulation allows users to customize their sound output extensively. Such comprehensive control over audio settings makes this app one of the highest quality media players available on Android devices.