st-util miscellaneous utility functions. @bitrate: @Returns: @samplerate: @Returns: @channels: @Returns: @bitrate: @samplerate: @channels: @Returns: @str: @c: @Returns: @big: @little: @Returns: @str: @prefix: @Returns: @str: @charset: @Returns: @filename: @Returns: @title: @contents: @Returns: @widget: @tooltip: