As you probably know, ANC headphones aren't the best sounding devices out there, they are very likely trading processing time for speed to achieve desired results, the DAC and amp in a pair of ANC headphones are nothing like the one in a regular phone or headphone, but if you are interested in a DIY project I found this PDF: https://www.google.com /url?q=https://courses.physics.illinois.edu/phys406/sp2017/Student_Projects/Spring12/Danylo_Hirnyj_P406_Project_Report_Sp12.pdf&sa=U&ved=2ahUKEwj2jvSVrLv7AhWoXvEDHU24AGQQFnoECAQQAg&usg=AOvVaw05PJIiwqh6tUowxQ6KcHvZ Of a guy attempting to build a pair himself (Remove the space in the URL, it's before the / after www.google.com, Reddit blocked the original link)