9 posts in this topic
Recording two separate audio tracks with beachteck dslr pro
Next friday I will have a shoot. Using a lavalier, dslr, shotgun and the audiorecorder DSLR from beachteck.
I'm not sure if I will use the sound of my shotgun as we are in a very airy space where sound with the shotgun could be bad.
Thinking of wiring my lavelier into the audiorecorder to my dslr as well. But is there a way to record two separate audio tracks with the beachteck? So I can ditch the shotgun track if I don't like it?
Thanxs for helping
Panasonic GH4 - Great Rig For Good Audio Capture
I've been a lurker in the forums for quite some time now, but this is my initial post.
I received my GH4 yesterday and have been playing with different setups. This is the best so far. Regular shoulder-rig with cage. A RÃ¸de shotgun mic with pistol grip attached to a super clamp which is attached to the cage. Sounds like a bad idea, but works wonderfully, and are easy to detach. There is no wiggle or instability. The RÃ¸de is connected to the Zoom H4N which is connected to the Panasonic. I've had great results so far with my testing and its hard to tell the difference between the GH4 Audio and the H4N recording. You can of course record audio with the recorder and have great referance audio in the GH4.
Works really good when you don't have a designated audio-guy.
About to buy a GH4 but... but how bad is this noise problem?
I've got my pennies together and I'm going to pick up a GH4 next week, and I even bought the EOSHD shooters guide.
Problem... This GH4 audio buzzing I keep hearing about. How bad is it really?
Lets say I bought a juice box to have with my GH4, and I was using it to record sound from radio mics from interviews/atmos though my GH4.
Are my interview audio going to be ruined? Is it that noticeable or is it a tiny little sound issue?
I'm going to be using my camera for short films but also for filming documentary work, and I don't want to have to use a separate recorder and then sync in Avid.
I need to know that the sound is going to be ok, if I end up making a feature documentary but need to go back to the original rushes from when I was starting out I need to know I can go back and the audio will be useable.
Anyone have any experience of this?
Any one have any examples of it that you can hear on footage of someone talking?
GH4 with Sound Devices preamp / Multi-layer 4K Green Screen
I fed mic-level output from a Sound Devices USB Pre 2 (standalone mode, has the same preamps/circuit as the 7xx recorders) into the GH4 set to -12dB mic gain (uploaded as 4K):
Understanding the GH4 Audio Buzz Issue
I analyzed the GH4 audio buzz issue yesterday. While I couldn't find any issue with the internal mics, the external circuit is picking up camera electronics, primarily the electronic shutter (buzz varies predominantly with shutter speed). I tried a few mics with TS, TRS, and TRRS plugs. The problem is not with the plug itself- the buzz is the same with them all.
If the Panasonic DMW-MS2 with TRRS plug really works without the buzz, then there's something going on with resistance and/or capacitance/grounding (or more). Reviews of the DMW-MS2 appear to show that the mic is both noisy and not very directional. It's a mid-side mic however decoding is only available on the mic (and controlled with camera settings). I use an Audio Technica BP4029 stereo shotgun on the FS700 (mid-side) and it's great being able to control the stereo field in post varying from pure directional shotgun (mono) to a wide stereo sound stage, and everything in between. The stereo is so good that listening with headphones on you'll turn around sometimes thinking the sound is live- it can be that 3D (similar to binaural).
The current workaround is going back to the standard DSLR method: setting in-camera gain to the lowest and using a preamp. For the GH4 that means setting mic gain to -12dB. At -12dB, the buzz is still present, however when testing with a Sennheiser G3 wireless system starting at -30dB receiver output and going up from there, the buzz seems to take a sharp reduction at around around -18 to -12dB G3 receiver output. Perhaps the GH4 has some form of AGC going on? In any case, at around -12dB (or higher) G3 receiver output, the SNR is high enough that examining the waveform in post shows the buzz is inaudible and audio is then usable. When testing with a Rode NTG-2 on battery with a TRS connector, the noise floor (white noise) isn't that bad on the GH4 (compared to the 5D3 for example). However the motor-boat buzz renders the audio unusable.
The buzz is a triangle wave, about 2x the amplitude of the noise floor. More info and waveforms + spectral plots here: http://www.dvxuser.com/V6/showthread.php?324401-External-Microphone-Solutions-for-the-GH4-(avoiding-the-buzz)
A low-cost, reasonably small and lightweight solution is an iRig Pre, for about $33. Along with a splitter cable (or with the soldering mod) it is small enough to attach to the back of a shotgun mic with Velcro or a rubber band. With a 9v battery, it supplies phantom power and sufficient gain for clean, high-quality audio.