On Sat, 16 Apr 2016 13:52:30 +0200 (CEST), Ffanci Silvain wrote: EQ settings depend on the used microphone and its position, the "room noise" and the kind of speech, music, instrument that was recorded. I doubt that there are default EQ settings, that can be used as a starting point. I noticed that my iPad's outputs have idiotic boosted bass, so IMO it's good not to add any EQ when using an iDevice with it's build in sound thingy, instead the EQing should be done after importing the WAV files to the Linux DAW. Assumed the recording already was manipulated by an iPhone EQ, you're most likely stranded, since you can't get back good sound, if the source should be completely biased, let alone that frequencies might be completely cut away. In my experiences enhancing the sound quality of recordings done with cheap equipment is hard to do, while parts of the recording might become good, other parts usually clang or are very muddy. Don't suffer from self-doubts, if you can't get, what you try to archive. It doesn't mean that you're an untalented engineer, it only means that you aren't a wizard ;). As a starting point you could try to use a low-path and high-path filter, perhaps it's possible to cut the lowest and highest frequencies, but usually the rest of cheap recordings is that bad, that you want to add some disgusting very high and low frequencies, so cutting low and high trash doesn't work. Sorry that I can't help, I only can confirm that it's more or less impossible to enhance really bad recordings done with bad audio equipment.