I made a full lossless recording off the Slane gig, at first i wanted to bring a field recorder with me but with the extra security measures because of the recent Manchester tragedy i decided not to bring one in (shit is expensive). Had to go through 3 security checks so i'm glad i did not. So i took 2 phones with me and recorded it with an android app called: amazing mp3 recorder which is an paid app but you can find an unlocked one on the net. Recorded it in wav format and it weighs about 2gb's, the app has a setting where u can lower the incoming volume by half or 0,25 so it's not distorted even though i was at the front. I haven't listened to it fully yet but it surely needs some patching specially the parts where there was some moshing going on and i couldn't resist joining in so i had to put it in my pocket. The times i held it out in the open it sounds quite okay. But in the end if you want a decent recording external mics or a field recorder is the way to go that's for sure.