> > (1)???? Reduce the echo of myself during audio recording in a room > > I'm not sure about what you mean here precisely. But in general this > isn't called echo, but feedback. The only difference between the two > is that with echo you have a large (~ > 20ms) delay and you can here > two distinct versions of the sound. With feedback the delay is in the > order of a typical wavelength (~ < 5ms) and you can hear a (often > high-pitched) ringing sound. > > The obvious solution would be not playing back the recorded audio over > the speakers. Is there any particular reason you want to hear > yourself? > And if the recording is for musical purposes, I'd strongly advise to > get a decent microphone. I mean, when a band is performing on stage > they can hear themselves over the monitor quite loud, but there's no > feedback and no echo-cancelling is used. (wel actually there are > devices called feedback-killers, but those are more automatic > equalizers and are generally not used for music event, but rather for > speech) > Thanks a lot for the information! I have two use cases in my mind: (a) If I speak in a large empty room and use a microphone to record my voice (no playing back), can PA module-echo-cancel reduce the echo/feedback? You mentioned to use a decent microphone, is such a microphone can reduce the feedback via its hardware? (b) When I do a presentation in a hall (both recording and playing back, and maybe multiple speakers), can PA module-echo-cancel reduce the echo/feedback? Thanks Mengdong
