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Old Aug 23, 2009, 2:27 PM   #681
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May you can build in another Microphone, but you coud not build a Volumecontrol because for that you need more than a "turning wheel" you need mic control too because it is stereo.

i will give a peace of plastikfoam a try and se whats happen. also for the windnoise.

a volumecontrole over the firmware can be possible but i dont think they will make a real control possibility by using the joystick or so.

for what you want to build in more batterys?
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Old Aug 23, 2009, 3:41 PM   #682
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Quote:
Originally Posted by Juggernauter View Post
May you can build in another Microphone, but you coud not build a Volumecontrol because for that you need more than a "turning wheel" you need mic control too because it is stereo.

i will give a peace of plastikfoam a try and se whats happen. also for the windnoise.

a volumecontrole over the firmware can be possible but i dont think they will make a real control possibility by using the joystick or so.

for what you want to build in more batterys?
Well, let's see, assuming that there's enough room, and there may not be, what could possibly be done is

1) swapping out the electret condenser mics that are there with better ones, or ones that meet the particular needs.

2) putting in a battery or batteries between the electret and the volume control. I don't know what kind of plug in power the aiptek gvs is sending to the mics. Perhaps a battery is not necessary?

3) add a volume control? volume controls are typically in stereo, and they can be very small, although they do vary in size. I've been looking at ebay, at headphones with volume control. This one seems to have a very small stereo volume control
http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT

I'm also not sure what effect on plug in power a volume control might have. I think I read somewhere that the volume control would diminish the power going to the electret as well as the sound going from the electret to the camera. If that is so, the battery would be needed to power the electret if the volume control is used.
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Old Aug 23, 2009, 5:33 PM   #683
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click pic or link for part two, about your response of the mics


http://www.youtube.com/watch?v=zAtZ5gr6SZg

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Old Aug 24, 2009, 1:39 AM   #684
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Over a night i think there is a way to handle this over the external mic in the right side. Cut the wires from the internal and mod a external with volumecontrol on the external mic port. Much easier or not?

Plastikfoam is OK for windnoise but not for more, i tested it today.

May i will test an external mod for the mic.
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Old Aug 24, 2009, 3:16 AM   #685
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that was what the video said
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Old Aug 25, 2009, 12:59 AM   #686
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This is still 2901 shot through a chain link fence (visible on the lower left and upper right corners) and recording audio through the built-in mic. Amazingly, with all of the movement/motion in the frame, autofocus only hunted once (at the beginning):

http://www.youtube.com/watch?v=Py1hke16DS4
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Old Aug 25, 2009, 3:10 AM   #687
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the cam will hunt, just not as much as the action hd, andwill hunt mor in a lower level and off set.
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Old Aug 25, 2009, 3:05 PM   #688
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I am shocked, after almost to a year , well 9 months, the Door, o the back exposing the cams ports has not fallen off?

t hat is amazing, to me, while the mpvr, action hd all had to be reglued LOL.
Next time a micro screw will do the trick

that should be a hint to Aiptek
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Old Aug 26, 2009, 7:48 PM   #689
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Parocks,

Just returning from time away and catching up on the thread. Thank you for your discussion regarding volume controls and such. I will probably try the Radio Shack volume control you identified here:
http://www.radioshack.com/product/index.jsp?productId=2102975

But I have a quick question or two. Iím using a cheap (maybe too cheap!), mono boom mic in my race car application. I donít need stereo sound, but I think I need a volume control to cut down distortion. The above controller is a stereo control. Do I need an adapter to go from my mono mic to the stereo volume controller? I assume that I can then just plug the volume control into the external mic port of the camera, right? If I donít use the mono-to-stereo adapter, will I get just ďone channelĒ of sound instead of two? Will that matter?

Also you show a very inexpensive volume-controlled headphone set here:http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT This may be a dumb question, but can you use headphones as microphones? Somewhere, I thought Iíd heard that.

TheShadow (Joao),

You asked for a photo of my rollbar-mounted camera. The camera and mount are out of the car currently, but next time I install it, Iíll try to photograph it and post it for you. Meanwhile, you can see the mount here:

http://www.ioportracing.com/Merchant2/merchant.mv?Screen=PROD&Product_Code=CM&Category_C ode=CM

Rob
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Old Aug 26, 2009, 10:19 PM   #690
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About the need for an adapter for the volume control, the short answer is, I don't know. If it is necessary, I'd think you'd need a mono to stereo adapter - like this maybe
http://cgi.ebay.com/1-8-Stereo-Male-...d=p3286.c0.m14

You also might have a possible problem with distortion at the microphone itself, so if the radio shack headphone volume control doesn't fix it, that might be your problem. Dynamic mics, with low sensitivity, don't distort as readily as electret condenser mics.
Here's a cheap dynamic mic that doesn't distort easily - the sensitivity is -73 dbm.
http://cgi.ebay.com/NADY-SP-1-SP1-DY...d=p3286.c0.m14
If you got that, you would probably need a cord from the mic to the headphone volume control, like this
http://cgi.ebay.com/Hosa-XVM-105-Rig...3286.m20.l1116
(although this looks like 1/8 mono, but it says stereo)

About the headphones with the volume control, the reason I put that link in there was to show how small the volume control part can be, perhaps small enough to squeeze into the aiptek gvs by the internal mics.

I also have heard that headphones can be used as microphones, but they typically aren't, I'm guessing that they don't really work, but kinda work.

People do use headphones to make microphones. When manufacturing binaural microphones, it's easy to just cut off the headphone part and use the wire. The headphone part is replaced by a electret microphone capsule. Many of those electret capsules have outstanding, flat frequency response - 20-20K. Electret capsules require external power to work. Some recorders do supply sufficient "plug in power" to power the external mics, others do not. In high volume situations, an external 9v battery box is often used.

This is the most popular capsule for binaurals - Panasonic WM-61A
http://cgi.ebay.com/Panasonic-Electr...d=p3286.c0.m14

I've purchased some capsules, some 3v batteries and a pair of headphones w/ volume control and am intending to see how that all works.


Quote:
Originally Posted by Rob 930 View Post
Parocks,

Just returning from time away and catching up on the thread. Thank you for your discussion regarding volume controls and such. I will probably try the Radio Shack volume control you identified here:
http://www.radioshack.com/product/index.jsp?productId=2102975

But I have a quick question or two. Iím using a cheap (maybe too cheap!), mono boom mic in my race car application. I donít need stereo sound, but I think I need a volume control to cut down distortion. The above controller is a stereo control. Do I need an adapter to go from my mono mic to the stereo volume controller? I assume that I can then just plug the volume control into the external mic port of the camera, right? If I donít use the mono-to-stereo adapter, will I get just ďone channelĒ of sound instead of two? Will that matter?

Also you show a very inexpensive volume-controlled headphone set here:http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT This may be a dumb question, but can you use headphones as microphones? Somewhere, I thought Iíd heard that.

TheShadow (Joao),

You asked for a photo of my rollbar-mounted camera. The camera and mount are out of the car currently, but next time I install it, Iíll try to photograph it and post it for you. Meanwhile, you can see the mount here:

http://www.ioportracing.com/Merchant2/merchant.mv?Screen=PROD&Product_Code=CM&Category_C ode=CM

Rob
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