hallo

do you know about existing ways to filter out JUST human speech from the auditory field?

i think it should be possible to recognize voice, and avoid noise/music etc. from a room.
is there an existing way?

thanks,

krisztian

you mean, you have a stereo music signal with e.g. a complete band with guitars, bass, drums and vox on the inlet and you only want to have the voices on the outlet? no, i'm pretty sure that's not possible or in any case not a trivial task.
if you aim at the opposit of those effects, that filter out a voice from a music file, so you get the instruments only as result - those efffects do not really filter voice, they filter everything in the middle of the stereo field such as voice, but unfortunately often the bass guitar and other instruments are set to middle too, so they will be filtered too.

edit: if you have a constant noise in a voice recording, then this is possible to reduce it more or less without big changes on the voice. this is a task for fft analysation and fir filters. theres a nice freeware plugin called reaFIR, look here:
http://www.reaper.fm/reaplugs/

hi. no, i don´t want to write melodyne in pd
just to start recording sound in an exhibition room, when someone talks.
if theres just noise, steps, coughing etc, i dont want to record.
the question is, if there´s a way to know if a soundsample IS human voice, or not.
i don´t even want to trace text from speech- just to know is something is speech or not.

hmmm.

@randomroutine said:

hi. no, i don´t want to write melodyne in pd

offtopic: although melodyne is a very cool piece of software, i guess it won't be capable of extracting the voice out of a music piece with several instruments...
ontopic: now, i don't believe that you can do this other than by equing. but maybe i'm wrong.... does someone know it better?

separating voice from any other sound is quite a task even in professional studiotechniques, as far as i can see.

maybe you could approach this in a different way, such as having an array of point directional mics pointing into the room at an average height of a human mouth and then get set up to record everthing as soon as a certain level of noise (hence, a voice presumably) is being detected.

yes, this sounds logical for me too...thanks

i was thinking about using some speech analysis too anyway --- if there is some vocals translatable, then i keep the sample...

@flo said:

separating voice from any other sound is quite a task even in professional studiotechniques, as far as i can see.

maybe you could approach this in a different way, such as having an array of point directional mics pointing into the room at an average height of a human mouth and then get set up to record everthing as soon as a certain level of noise (hence, a voice presumably) is being detected.

then you could use some eqing to filter evwrything not in human voice spectral domain.
anyway, keep in mind that it will be difficult to have a really clean recording