bismark m16 is the MIDI player application, which can load SMF (Standard MIDI File) for GM (General MIDI) specification as Song files. Song files are managed in the "m16" folder of your iCloud Drive, and synced between all your iOS / iPadOS devices. 16 icons arranged in the upper part of the main screen show 16 MIDI channels. Each channel is changed to the mute or the solo mode by tapping icons once or twice. To open the options screen, do a long press gesture to the icon. Moreover, during playback, performance information is displayed in the icon in piano roll/circle/MIDI analyzer mode. On the lower side of the screen, there are 12 buttons and 1 slider is displayed. They work for start/stop playback, seeking song position, changing key and tempo. m16 supports background MIDI playback. So you can play your favorite musical instrument app together with the background tracks produced by bismark m16! Also, bismark m16 has CoreMIDI output, then it can play external MIDI modules using CoreMIDI compatible interfaces. You can mix m16 sound output and other Virtual MIDI compatible applications in the background.