Here is DTXMania made by Unity 2018.2.14f1. All resources are from [DTXMania2]

• you can add DTX files to [Assets/StreamingAssets], then click the menu [DTXMania/AutoBuildStreamingPath], you can make the song build-in with the package.
• you can add file path to [MainScript/MusicFolders], then it will search for dtx files at the launch stage.
• in android device, you can make a folder name [DTXFiles] and put the dtx files in it.

• test on android TV.
• support android usb midi input.
• support external storage DTX files.

• https://github.com/DTXMania/DTXMania2
• https://github.com/kshoji/USB-MIDI-Driver
• https://github.com/Dridi/bjxa