I don't think audio recording is ineffective depending on the application of it. The best practice is to write notes and have the recording for reference. You can't write down everything that is said, so it is helpful to have a recording, should you have the need to better interpret your notes or for better clarification. The the second mic for noise cancelation on the N4 seems to do a poor job. I'm not sure with audio recording only, as I do none of that, but with video plus sound, it is horrible. I would find it hard to recommend this phone for that purpose.
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