Audio level meter in Javascript

resetreset · 05-23-2011, 02:54 AM

Hi,
When someone is speaking into the mic, I'd like a "level meter" such as the one that comes with gnome sound recorder, that flashes up and down when a sound is made or somebody talks.
This will be done in Javascript, using the brand new "Rainbow API", i.e. inside the browser.

I know nothing about audio programming, so - where would I get *started* with something like this? Could anyone tell me at least WHAT to Google?

Thanks.

Golding · 05-24-2011, 03:34 AM

Quote:

Originally Posted by resetreset

Hi,
When someone is speaking into the mic, I'd like a "level meter" such as the one that comes with gnome sound recorder, that flashes up and down when a sound is made or somebody talks.
This will be done in Javascript, using the brand new "Rainbow API", i.e. inside the browser.

I know nothing about audio programming, so - where would I get *started* with something like this? Could anyone tell me at least WHAT to Google?

Thanks.

I've been coding Javascript for years, and have never came across anything that can record audio. I think this would be a major security risk if it was possible. You might need Flash for that. I've certainly never came across it.

You could try searching "Recording audio Javascript"

Hope that helps.

resetreset · 05-24-2011, 10:53 AM

Quote:

Originally Posted by Golding

I've been coding Javascript for years, and have never came across anything that can record audio.

Check this out then:
http://mozillalabs.com/rainbow/

dugan · 05-24-2011, 11:05 AM

Quote:

Originally Posted by Golding

I think this would be a major security risk if it was possible.

Why?