[Yoake]

I'm not surprised that Ayu is sick. Autumn is a bad season.

I agree with ayumisrael and the others. No phone can record a concert with a perfect sound because it's impossible that the mic catches each waves perfectly without compressing them. That's the reason why the sound of a concert is rework based on each source/mic(vocal, guitar, drum, etc) to create the dvd and not on the recording of only one source somewhere in the hall.
Besides no music critic who respects his/her job, will judge the quality of a singer's vocal on a recording made among the crowd with a phone or tablet.