[FFmpeg-user] Stream microphone to speakers

[Michael Koch]

Am 07.08.2020 um 04:59 schrieb Vi Rak:
> Dear gentle experts,
>
> I'm working on the Karaoke project for both Android and iOS where a user
> could record their performances (their video and vocal) and I use FFmpeg
> for mixing music with their recordings. Anyway, I wish I could route/pipe
> user vocal at realtime (capture thru device microphone) to an output device
> (speaker) so the user could hear their voice at realtime applied with some
> level of echo (to produce an effect as if we were in classic karaoke room).
> Over weeks I have been struggling with searching the ways to implement that
> based on FFmpeg, but no luck. Please kindly help.

For Windows I have some examples in my book, please see chapters 3.19 
and 3.20:
www.astro-electronic.de/FFmpeg_Book.pdf

Michael