Can you give some advice or may be help us to build ideal equalizer plugin for the player ? Patrick Vlaskovits October 16, 2017 08:01 Follow Please check our SuperpoweredFilter, which offers much more options. Related articles I used the functions createWAV, fwrite and closeWAV, and they could to save files in app data directory but not in the sdcard. Why is that? Comments 0 comments Article is closed for comments.