Audio Question HMC150

S

snuffokk

New member
I have a question. I just purchased a HMC150 and was testing the audio late this evening. I am new when it comes to productions & video. I was recording a with a shotgun mic to Ch1 and a wireless lav to Ch2. For some reason the Audio was not coming in clear. There is a soft static sound; Especially with the Lava mic. My question is…. I was told to purchase an “audio box” of some sort and feed the XLR to the Box and then to the mics. In-other-words, is there a mixer or some kind of system that I can plug the mics into and then into the HMC150. I was told that this “box would clean up the humming noises and static sounds. Basically, the guy told me not to plug the mics directly into the HMC150 camera but instead purchase the “box” to be the go between so that the sound is clearer. Is that what an audio mixer is? Do you have any recommendation that I can purchase?


Also, when I take the memory card out of the camera and important the footage to my Mac Pro, will the Audio be in two separate files? One file for channel 1; the other for channel 2? OR doe it combine both channels into one audio file? I am new to the world of video production so please bare with me.

I was told that when using a single mic to record, I am supposed to use the two channels, but to set the second channel -6dB lower than the first as a safety precaution. Should a sudden and loud peak over-modulate (distort) the first channel, the second (safety) channel has a little more headroom and may avoid the clipping. So if my first channel does get distorted then I can use my second channel as a fall-back? Does that mean the HMC150 creates TWO audio files? :shocked:
 
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There should be no static at all. Check your levels and maybe you have a defective unit. I had this issue with my lav and it turned out to be a bad mic so after replacing it everything was fine.

You do NOT need any kind of mixing board or anything else. Are you powering the shotgun with phantom power? Make sure phantom is off for the lav.

AVCHD natively has one stereo channel for audio, however when you import it into FCP it will transcode so I don't know what your transcode settings are..
 
You will get two audio files; they may be linked as a stereo file or not, depending upon your settings; but they can be split, center panned, and treated separately in FCP with the audio mixer.

If you're using mics with XLRs, you shouldn't need any other hardware. Did you check to see if the noise was on only once channel? Wireless lavs can add all sorts of hisses and buzzes to a track, especially cheap ones. Listen to the tracks separately and see if the noise is on both tracks.
 
+1 What everyone said. There is NO need for an external preamp (which is what your friend told you about, not a mixer necessarily). If its buzzing it is likely the quality of the lavalier, or a ground hum if the audio source is improperly grounded. I worked in audio for 8 years and honestly if I heard the 'buzz' I could tell you immediately where it was coming from. Ground buzzes/humms and dramatically different than the sound of cheap equipment.

Best of luck! Feel free to PM if you have specific audio questions.
 
Hi I am having audio problems and i suspect the mic is the problem...
1)How can I tell what the problem is with the mic, if it is the problem?
2) are there any other settings that i can adjust the audio with other than
>menu
>recording setting
>audio mic 1/2
and the amps on the side?

Please help I do a lot of interviews and need to fix this problem...
My you tube channel is http://www.youtube.com/shaulina7

I have been having to fix all the noise in premiere pro with the de-noiser, but the noise is getting worse and worse...

Thanks!! Oh yea and if you can recommend a good shot gun mic I would be happy under $300 please
 
AT897 is a great shotgun mic in your price range!

What is the audio problem you are having? Describe the details, post a sample if possible, and please post model and make! Very important details for troubleshooting. Are you running your mic directly into the camera? Does it require phantom and are you giving it? It the switch set to mic/line...?
 
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