I have a play and song is grayed out and cannot play?

「Play song list screen” is grayed out.、There are two cases below。

1. Light gray
   「Player screen''s 'Playback mode display' is set to 'Skip play'.、If the specified playback tempo range is outside the original tempo range、The current settings indicate that the song is to be skipped.。Tap "Playback mode display" and change to "Adjust play"、By tapping the "tempo selection button" and changing the tempo specification,、will be playable。

2. Dark gray
   Items that are dark gray and have “N/A” displayed in the tempo display field are、This song cannot be played on Walking Player.。Mostly DRM(Copyright protection)The songs with、It becomes a dark gray display like this、Can't play。Can you play songs with DRM?、Is it a standard music player app?、Or only apps that use the standard music player internally。Apps like Walking Player that need to directly read and analyze music data、Unable to read song data with DRM、Can't play。

   but、Fortunately, Apple is moving towards eliminating this DRM.。Songs imported from CD、Since there is no DRM added, you can play it without any problems.。Also、2012Songs purchased from the Japanese iTunes Store after March 2019、All are DRM-free(The United States is more DRM-free from the previous)。2012Songs purchased from the Japanese iTunes Store before February 2019、Please note that DRM may be added.。

   In addition、Songs with DRM、You can remove DRM using one of the following methods。

• Export to CD-R using iTunes using a computer、Re-import from CD-R。
• Sign up for iTunes Match、Download previously purchased music in iTunes Plus format。
  (Reference:iTunes Store：Frequently asked questions about iTunes Plus (FAQ))

※however、2013As of August、iTunes Match cannot be registered at the Japanese iTunes Store。The latter method is、In Japan you will have to wait a little longer。