and SoundFont sample library. Multiple SoundFonts can be loaded into MuseScore's synthesizer. It includes a mixer to mute, solo, or adjust the volume of individual parts, and chorus, reverb and other effects are supported during playback. MIDI output to external devices and software synthesizers is also possible. Supported file formats MuseScore can import and export to many formats, though some are export only (visual representations and audio) and some are import only (native files from some other music notation programs). MuseScore's native file formats are .mscz, a zip compressed file containing the score and other media, and .mscx, which is XML data that contains the score. The .mscz format is usually preferred, as it uses less space and can support images. MuseScore also can import and export both compressed (.mxl) and uncompressed (.xml) MusicXML files, which allows a score to be opened up in other music notation programs (including Sibelius and Finale). It can also import and export MIDI (.mid, .midi, and .kar), which is supported by many other programs (such as Synthesia), although since MIDI is not designed for sheet music, most score notations are lost. MuseScore can also import certain other music software's native formats, including Band-in-a-Box (.mgu and .sgu), Bagpipe Music Writer (.bww), Guitar Pro (.gtp, .gp3, .gp4, .gp5, and .gpx), Capella (must be version 2000 (3.0) or later; .cap and .capx) and Overture formats. It can also import MuseData (.md), which has been superseded by MusicXML. Audio can be exported to WAV, FLAC, MP3, and OGG files, and graphical representations of scores can also be exported to PDF, SVG, and PNG formats, and/or printed directly. Optical music recognition MuseScore includes an optical music recognition feature which can convert PDFs to the native MuseScore file format, .mscz. This feature is web-based and uses the open source Audiveris project as a back-end. Mobile player Since May 2014 MuseScore has mobile apps available for iOS, Android and Kindle Fire which tie into the MuseScore score sharing site. The app can play scores, and allows changing of transposition and part extraction, but does not allow creating or editing scores. Portable application MuseScore also runs as a portable application. It can be installed onto a regular hard disk drive or stored on a removable storage device such as a CD, USB flash drive or flash card, so that it can be run on any compatible Windows computer system. Custom fonts In