I got a new iPod about a month ago, and used my own headphones not even bothering worrying about the ones Apple gave me. Today I looked at them and realized they had a mic on them. I plugged them in and listened to music and they worked fine. I went to Voice Memos and it said I needed to plug a mic in, even though I already did. Is there something wrong with them, or do I have to configure them first? Help very much appreciated!