Hey guys so heres the problem i cant seem to solve on my own

So i wanted to make my wired headphones (sony headphones) not so wired by cutting the cables and taking a audio plug and my beats aux cord to make it so all i have to do is plug the aux cord from my headphones to my phone but ive noticed that when i soldered all the right cables to the right places i could hear the beat but the voice was faded any info would be helpful

 

At the current moment i cant find the sheet i used to determine where everything goes but if i remember L1(starting from right to left)is the first R follows then its R1 and after that it is L the last pin(all the way to the left) i think is for a mic but the aux already comes with a mic