mp3 audio recorder for skype calls

i need an audio MP3 recorder for Skype and Microsoft Teams Calls. The recorder should start recording when I make a call on the above apps. and stop recording, create an mp3 file and save in the local PC when I stop the Call. i complied few apps using already available source code but failed. so i should be a genuine start from scratch app. it should work on windows 7 and for both USB head phone and JACKs headphones. Thank you.