When it comes to performing before a microphone, there are many different synonyms that can be used to describe the act. One of the most common is "broadcasting," which refers to the process of sending out a signal through radio or television waves. "Podcasting" is another term that has become popular in recent years for recording and distributing audio content through the internet. "Live streaming" is also often used to describe performances that are transmitted in real-time through the internet. Other possible synonyms might include "stage" or "on-air," depending on the context and medium of the performance. Ultimately, the most important thing is to find the right word that accurately conveys the nature of the performance and the medium through which it is being conveyed.