general architectural approach question
general architectural approach question
- Subject: general architectural approach question
- From: Robert Spychala <email@hidden>
- Date: Tue, 14 Aug 2012 12:02:17 -0400
Hi, I'm building a voice recording application for OS X and am looking
into optimizing the audio quality of recorded voice with a macbook /
iMac. I'm finding out that in most environments with ambient sounds
(like AC, fans etc) there is a lot of hiss. All obvious things. The
app doesn't do any live chat, so duplexing would not be used.
My question is, what's the best approach for removing the hiss?
1) using kAudioUnitSubType_RemoteIO with an AUGraph of
kAudioUnitSubType_MultiBandCompressor +
kAudioUnitSubType_HighPassFilter to automatically clean up the
recording?
2) using kAudioUnitSubType_VoiceProcessingIO only?
3) kAudioUnitSubType_VoiceProcessingIO + compressor and filter?
Separately, the new Mac Book Airs have beam forming built in with the
dual microphones. Will that work with
kAudioUnitSubType_VoiceProcessingIO only? or also for
kAudioUnitSubType_RemoteIO and general recording.
thanks
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