@Aenima Thanks! I hope that helps people, too and I'll try to post it a few places. :)

Sorry I am just getting back to the issue of making quality audio to the GH2... I got the Beachtkek DXA-2T to work with my GH2. Monitoring is a big issue...

I also have the BeachTek DXA-5DA working very well with my GH3 for field recordings. I have not tried using the DXA-5DA with the GH2 yet...

I expect the BeackTek DXA-5DA to work very well GH2... This unit eats 9 volt batteries...the plus side to this device is to be able to monitor the audio input to the GH2... I am looking into 9 volt battery AC adapter now...

What I especially like about the BeachTek devices is to be able to plug line level or microphone levels in as well as other line level devices in...

Beachtkek DXA-2T http://www.amazon.com/BeachTek-Universal-Adapter-Compact-Camcorders/dp/B0039QWR5I/ref=sr_1_1?s=electronics&ie=UTF8&qid=1371047896&sr=1-1&keywords=beachtek+dxa-2t

BeachTek DXA-5DA http://www.amazon.com/BeachTek-DXA-5Da-Passive-Adapter-Camcorders/dp/B0039QWR7Q/ref=sr_1_3?s=electronics&ie=UTF8&qid=1371047896&sr=1-3&keywords=beachtek+dxa-2t

I have not tried the BeachTek DXA-SLR Dual XLR Audio Adapter with Built-in Preamplifiers and Phantom Power for DSLR Cameras with Mic Jack http://www.amazon.com/BeachTek-DXA-SLR-Adapter-Preamplifiers-Phantom/dp/B003E3RK26/ref=sr_1_2?s=electronics&ie=UTF8&qid=1371047896&sr=1-2&keywords=beachtek+dxa-2t

This is a better build with sturdy die-cast aluminum chassis Camera mounting bolt Record/Playback monitor AGC Disable feature Headphone jack

@LALisa Looking forward to hearing your experiences with it. Keep posting!

Hi I have read everything but found nothing to solve the problem. Maybe I'm right here and find help. my setup is a NTG2 with XLR to ART USBDualPre connected with the GH2, AGC 0 - 235 / AGC 1 - 203. Everything worked fine until I wanted to connect a fieldmonitor via HDMI. Whenever I connect the HDMI cable with the GH2 for video monitoring, the sound gets terrible, humming and bad disturbin noise. I've tried many things but nothing. It must be possible to connect an external microphone and a monitor for liveview, or am I totally wrong?

Hopefully someone can help me, excuse my english;).

greetings

Thank you for your answer. In this way I was able to find the 'ART USB DualPreamp' as a source of interference. First I tested with field monitor only, as you suggested. There is no humming with in camera mic, i used AGC-level 3 - 128. Than, with NTG2 plugged directly into the GH2, without preamp, it sounds good too. As third try I changed the NTG2 with the H4N as external mic plugged into camera, same result, clear sound without humming while video monitoring. I set the mic-level to 1/ 235, checked all cables and tried with the preamp, first the NTG2 and then the H4N . . . strong humming. I changed the XLR-cables, used another power source for the preamp. When I turned off the monitor, clear sound. Too bad! Maybe we'll find out why the preamp disturbs. Probably the device is of low quality?

Maybe it has to do with the ART's 1/4" outs, I found something: "A final issue to consider is getting your camera an impedance that it likes. I've had a maddening issue with broadband noise and it seems to be related to impedance, 600 Ohms is noisy and 150 - 200 Ohms is quiet. The ART's headphone output impedance is quite low (50 Ohms), but the 1/4" outs are 600 Ohms, so simply padding their output may not be sufficient to get a good result."

Maybe a Sescom cable is the solution.

Cool - Reminds me of how plugging in (vs battery only) can cause problems for some electronics.

Many thanks for writing your experience with the ART USB Dual Pre. When I plug it into the socket, there is no noise. I can not operate both via V-Mount Battery, either ART or Lilliput. It's really frustrating.

Hi !

thanks for this topic !

Do you or any knows if, as I don't use audio at all, I do music videos only, I can disable totaly the audio or reduce the stream to 1 on the camera or by modifying the hack by editing them ?

this should help stability a little

thx !

@thepalalias i try to use a minor step between levels

@MirrorMan I think that's the coolest demonstration I've heard anyone do with the Pasadena Pulse Audio settings so far. Kudos. :) I want to try something with the MP4 real quick - I'll post again shortly.

@thepalalias Thanks for the additional tests. I think the Primo/GH2 combo holds up really well and this quality would not be possible without your audio settings. If anything, the capsules are maybe too sensitive for the current AGC settings. As you heard in very quiet environments I could not go above +2 without it hanging in the red and the cameras compression being too noticeable (for me). So for a noisy urban environments a really low sensitivity will be good to have (I'll test it soon). Regardless, I'm so impressed I went ahead and ordered a second pair of Primos to build my on camera 'dream mic', an ultra-lightweight high sensitivity ambient stereo mic. Its basically the two capsules mounted on a cheap shockmount rig turned sideways with a styrofoam baffle in between. For wind protection, I used the ends of two foam windscreens and covered it with a stocking. I'll need sew up a furry soon for heavy wind conditions, but so far this works great. I've also set my Drewnet T9 audio setting to 320kbps.

Coincidentally (or not) these are the same capsules used in the 3Dio 'free space' binaural mics (http://3diosound.com/). I've tried that one. Its nice but I'm not a big fan of binaural sound for video and the rig is really bulky. My mic weighs about an once, doesn't need batteries and cost me less than $40.

@Fieel The audiohack is already included in any recent Driftwood patch unless specifically mentioned otherwise. This includes Moon T8.