Odd experience today: My spouse/partner has a PCM-M10 which she uses for playback of pre-recorded piano accompaniments for her singing. It has worked perfectly any number of times. But today at her voice lesson when she turned it on, the settings for playback speed and "key" (= pitch) had both shifted downwards, as I confirmed this evening when I looked through the menu settings.
Thing is, until tonight when I showed her, she didn't even know how to get in to the menus or to operate them, and no one else had had access to the recorder. Those settings just "changed themselves," it seems.
Has anyone else here had this happen?