11-04-2011 03:15 AM
Are there any known issues with the microphone volume fluctuating on the device? My functions are sometimes reporting a wide range of amplitudes for ambient noise even though the actual noise levels are not changing significantly. I'm fairly confident my algorithms are correct and bug free.
Is this a known issue?
Solved! Go to Solution.
11-04-2011 04:14 PM
I believe the microphone has AGC (automatic gain control). A few months ago I took video with the playbook of a severe thunderstorm with heavy rain, and in the recording you could hear the rain, but when loud thunder came up, you could hear it just fine (no clipping), but you could not hear the rain. As the thunder sound faded away, the "rain volume" came back up. It's so good that I would think it's hardware rather than software AGC.
11-18-2011 07:41 PM
I recorded a video with my speakers blasting music away and it recorded with no clipping (is it the same as sscratching). None at all and you could feel how loud it was, so yes, it does it pretty well, most likely hardware.
I believe the PlayBook microphones are the best in class.
11-19-2011 02:49 AM
I agree that the playbook mics are the best. It's not just a glitzy feature either, it's actually extremely useful. I walk along a busy street for several minutes on my way to work and with previous voice recorders it would clip out so I couldn't take any voice notes. With the playbook I just have to talk loud and close to the mic and it all comes out perfectly clear. So nice!
11-19-2011 03:04 AM