The Gearslutz thread has errors. It conflates binaural recording for measurement and binaural recording for playback. Take it with a grain of salt.
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One important thing to note is that if you're planning on playing back over on-ear headphones, you do not want to record at the eardrum. In that case, ideally you want to record at the entrance to a blocked ear canal. That way the microphone picks up the influence of the outer ear but doesn't hear the resonances of the ear canal.
A simple way to do that is to build the microphones into a silicone ear mold. The ear mold can be made by your local audiologist or use the kits from Decibullz or Radians.
If you mount the microphone near the entrance to the ear canal but slightly above or in front of it, the resonance of the ear canal can be neglected. That's how our clip-on binaural mic set are intended to be used. They sit in the shadow of the pinna, but not exactly at the ear canal entrance. Or, as I mentioned, you can build the High End Binaural capsules (DPA 4060-series) into custom ear molds.
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If you record at the ear drum and play back at the entrance to the ear, you'll have to subtract out the ear canal response. That's not easy to do.
It makes sense to record at the ear drum only if you are doing measurements or are playing back using an in-ear phone that sits at the end of the ear canal, right next to the ear drum. Otherwise it's a bad idea.
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Dummy heads have a single HRTF. The dummy's HRTF is literally wrong for everyone. If your personal HRTF is close to the dummy head's HRTF, you'll get a good effect. Otherwise you'll have serious problems distinguishing front from rear, and you'll have poor elevation (vertical) cues.
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Hooke Audio's Verse is a low cost binaural recording solution. It has a pair of microphones built into in-ear phones. It records reliably via Bluetooth to smartphones. Other than having a relatively high self-noise spec, it's a good set of microphones for concert taping. I see three sets on eBay at the moment.