SoundCloud is an online audio distribution platform and music sharing website based in Berlin, Germany that enables its users to upload, promote, and share audio. Features SoundCloud's key features include the ability to access uploaded files via unique URLs, thus allowing sound files to be embedded in Twitter and Facebook posts. A file may be embedded by clicking a share button corresponding to the target site (e.g., Twitter). Registered users can listen to unlimited audio and may upload up to 180 minutes of audio to their profile at no cost. SoundCloud distributes music using widgets and apps. Users can place the widget on their own websites or blogs, and then SoundCloud will automatically tweet every track uploaded. SoundCloud depicts audio tracks graphically as waveforms and allows users to post "timed comments" on specific parts of any track. These comments are displayed while the associated audio segment is played. Users are allowed to create playlists and to "Like" (specific tracks, which will then be saved to the user's "Like" page), "Repost", "Share", to "Follow" another user, and to make complimentary downloads of their audio available. SoundCloud supports AIFF, WAV, FLAC, ALAC, OGG, MP2, MP3, AAC, AMR, and WMA files.It then transcodes them to MP3 at 128 kbit/s and Opus at 64 kbit/s for streaming purposes.