Chris,
NO tantalum caps EVER in audio circuits for coupling. Using them in this application means trouble, and I mean TROUBLE. I prefer low ESR high temperature electrolytics for audio, for example Panasonic FC, if I need 10uF or more. For lower values, I prefer WIMA MKS2 metallized Polyester film caps, since they are available up to 10uF in a compact package.
BTW I see no risk in gorlandos application. The voltage difference is low, and the currents can not reach dangerous values (there are also resistors in the Sony mic input for PIP (6k8 in most cases). He also states that he uses 1% metal film resistors.
Greetings,
Rainer