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Thread: Getting decent video audio on your Seven

  1. #11
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    I have not tested the camera but looking at the external mic and its sound specs I can get a sense of it being comparable to the Crocolis camera I have used. The Replay external mic is a variation of the AT3350. Powered are powered mics using the LR44 battery.

    Given the very compact size of the camera I would not be surprised if you have inbuilt compromizes on the ability of the camera to process sound recordings from demandingly loud environments.

    My suggestion to improve matters would be:

    1) get a 3.5mm extender cable (3.5mm male end and a 3.5mm female end) that will allow you to go from the camera back to the engine bay. These are cheap.
    http://www.amazon.com/iMBAPrice-iMBA....5mm+extension

    2) Place the Replay mic in the engine bay somewhere out of the way where it cannot be eaten, burned, fried or otherwise destructive in rapidly rotating belts. I tape mine down to be sure. i am assuming that the end cap shown in the Replay XD external mic kit can be removed for this?

    3) Give it a test.

    4) If that test shows wind noise then look for a mini windcutter dead cat/kitten/pussy to mask the wind and try again.

    5) If the test in 3) does not reveal wind noise but shows that the mic cannot handle the sound - breaking up, distortion, hoover noises, etc, then you have an issue with the mic. Maybe start cheap and try the AT3350 first as a replacement. Its a good little mic for the money but I just found they would break on me. Admittedly I am using them in a very demanding automotive environment!
    Mike
    2010 Caterham CSR with Cosworth 2.3 Duratec
    2018 Caterham 420R with 2L Duratec 210hp at Donington UK
    1975 BMW CSL Group 4 (restoration - engine and dry sump install time)
    1977 Holden Torana "A9X" (awaiting restoration)
    1985 Holden Commodore SS Group A
    1985 Holden Commodore Group A
    1982 Ferrari 400i
    1965 Ford Mustang Fastback "Holman Moody"
    1992 Ford Escort RS Cosworth WRC (fettling after long period of storage)
    1990 Range Rover 2 door Classic
    and another project car coming....

  2. #12
    Join Date
    Jul 2009
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    Default Location is all!

    I have used GoPro cameras for years and always laugh at the "over 100 MPH use closed case" note, more like "over 40 MPH just give up", (see cheezy music note posted by others).
    When the Hero2 came out I jumped on it and after a few trys have had good luck (in an S2K) with stereo mics, one inside the passanger footwell deep under the dash for motor and one mounted in the boot for rosd sound, both with a dead pussy covering it (see great post by others).
    I do have to admit that my loose suspension sounds like a cheap coffee can and pebbles percussion group till the car comes up to speed but then you get some good tire noise.
    Don't remember the brand but non-powered and about $75 bucks for the pair. Haven't had any problem with headroom on the unpowered mics. GoPro does have a limited power supplied to the mics so you don't need to supply an outboard power unit
    Jim Rankin
    WCM S2K
    '04 MINI Cooper S
    '07 BMW3 Sportwagon
    '67 Camaro SS-RS
    '58 Jaguar XK150
    Silverado & trailer to haul it all.

  3. #13
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    Most of the usual mics (nowadays typically electret condensor mics with or without preamp) just have trouble with the decibel level. They are not made for that and distort the signal already, then still output high volume signal into the recorder which may distort it even more before it gets in to the AGC stage.

    I had moderade success with an old fashioned passive dynamic microphone from Radioshack. This normally needs a mic preamp but with a 1:4 audio transformer I just routed it directly into the camcorder (I used a Contour HD with hacked electronics for a remote mic) and slid the mic behind the driver seat. Somewhat decent volume (usually needed some boost when editing), good exhaust sound but in that position also some suspension click/clack and wheel noise on uneven pavement.

    However, I have given up video recording for the most part. I still have unedited video from 6 years ago and don't need to add to that....
    Last edited by slomove; 07-26-2013 at 07:55 PM.

  4. #14
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    Oct 2006
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    Cincinnati
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    Regardless of quality, I find the soundtrack very instructive as trackday driving feedback. I can hear myself lift off the gas in the fast corner where I wld swear on a bible I never lift, hear the motor tail off way before the corner that I thot I was charging up to, hear myself get on/off the trottle in places where I shd be smooth. If I compare my "sound" to a fast driver on the same track, I can "hear" where they are faster.
    Kitcat:AKA, Sir Spinsalot
    '97 Caterham Super Sprint, 1700 Crossflow-sold
    '09 Birkin S3, Duratec-sold
    '03 Caterham Zetec track car
    '19 Honda Type R, sold
    '19 Miata Clubsport

  5. #15
    Join Date
    Jan 2012
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    santa cruz, california
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    So besides the GoPro HD2 - and the Drift cam - what were the best camera's for audio capture?

    I'm looking at getting a Replay XD, GoPro, JVC or other action cam soon.

  6. #16
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    Feb 2009
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    NYC
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    Well the JVC will not help you as that does not have an external mic option. At least it did not in its just superseded version. And I never saw a good review on its audio. Not sure if the new release for late this month does have an external mic?

    Xcarguy on here is working with a Replay. I like the small size but it seems to have audio processing problems from the youtube I see of his but that could be because of operator challenges?

    Never tested a Contour but someone else here probably has.

    I rank the GoPro (HD2 for me) marginally over the Drift HD Ghost for sound capture using an external mic. The HD2 captures very noisy environment (i.e. our cars) much better without distorting. The GoPro Black/Silver are supposed to be better again. The same mic was used in my back to back testing. This is a marginal win in my view as they are pretty close and I am being fussy in my evaluation.

    However, the Ghost is a much better package design overall - all in one design makes it much cheaper than a GoPro Silver where you have to buy all the options (eg, viewing screen). The swivel lens is very helpful in getting upright images without ball head mounting adapters. Also a very helpful customer service function. A GoPro Black will beat the Ghost easily for quality but at what cost?
    Last edited by Croc; 08-03-2013 at 05:17 AM.
    Mike
    2010 Caterham CSR with Cosworth 2.3 Duratec
    2018 Caterham 420R with 2L Duratec 210hp at Donington UK
    1975 BMW CSL Group 4 (restoration - engine and dry sump install time)
    1977 Holden Torana "A9X" (awaiting restoration)
    1985 Holden Commodore SS Group A
    1985 Holden Commodore Group A
    1982 Ferrari 400i
    1965 Ford Mustang Fastback "Holman Moody"
    1992 Ford Escort RS Cosworth WRC (fettling after long period of storage)
    1990 Range Rover 2 door Classic
    and another project car coming....

  7. #17
    Join Date
    Jul 2009
    Location
    Arkansas and . . .
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    3,635

    Default Replay XD1080 HD Report . . . sorta'

    [quote=Croc;76519]Xcarguy on here is working with a Replay. I like the small size but it seems to have audio processing problems from the youtube I see of his but that could be because of operator challenges?/quote]

    I am using the Replay XD1080 HD and have only had it in hand since April, so I’m fairly new to the camera; Croc, the rear cap on the camera is removable.

    After researching cameras, I chose the Replay for its simplicity and size. The video quality is superb (my humble opinion) and the camera programming can be manipulated to suit the needs of the user. For example, I have reprogrammed y camera for an external power application. When I plug the external power cord into the power outlet in my car, the camera turns on and automatically begins recording. When I remove the external power cord from the power outlet the camera will record for an additional 60 seconds and then automatically powers down; a great feature if you are strapped in your car and have your camera located where you can’t easily reach the ON and RECORD buttons.

    Dialing in sound quality has been my nemesis thus far; and, my ‘operator challenges’ haven’t helped. The Replay comes with small ‘stick-on’ windbreakers that you affix over the mic hole to suppress wind noise. During my first track day with the camera in April, I placed one of the windbreakers in the wrong place on the camera (mic wide open to the wind). After watching the first video, I rechecked the camera and discovered the misplacement of the wind breaker—operator error. The wind noise on the videos was so horrible that overlay music was the best/salvageable option.

    After this adventure, I place the windbreaker correctly over the mic hole and went for a test hop; this too proved fruitless. It suppressed the wind noise to an extent, but it also suppressed the engine sound I have ‘yet to date’ to capture. I then ordered the Replay external mic and picked up a foam windsock at the local music store. Several test hops later (and several different mic locations) and I still wasn’t happy with the sound quality. I tried behind the seat (high and low positions). I even tried running a hollow flexible tube (plastic electrical conduit) down to the exhaust tip; ran the mic down the tube and still, no good sound quality.

    During my next track day, I placed the mic underneath the dash. At the end of the day, I discovered that I never turned on the mic ( AHHHHHH!!!!!!). The second batch of videos I posted (6//1/13) are shot with the Replay windbreaker placed over the mic hole. To date, I haven’t gone out and done a test hop with the mic placed under the dash AND TURNED ON. Once I run an under-dash test hop, I’ll report back on this thread.

    My last resort with the Replay mic will be to place it in the engine bay; I also may try a different windsock. However, this may be a problem area as well due to the sides of my engine bay being open and exposed to the wind. We’ll see.

    X
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  8. #18
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    Quote Originally Posted by xcarguy View Post
    ( AHHHHHH!!!!!!)
    I can soooo relate to this frustration
    Mike
    2010 Caterham CSR with Cosworth 2.3 Duratec
    2018 Caterham 420R with 2L Duratec 210hp at Donington UK
    1975 BMW CSL Group 4 (restoration - engine and dry sump install time)
    1977 Holden Torana "A9X" (awaiting restoration)
    1985 Holden Commodore SS Group A
    1985 Holden Commodore Group A
    1982 Ferrari 400i
    1965 Ford Mustang Fastback "Holman Moody"
    1992 Ford Escort RS Cosworth WRC (fettling after long period of storage)
    1990 Range Rover 2 door Classic
    and another project car coming....

  9. #19
    Join Date
    Dec 2009
    Location
    Sydney Australia
    Posts
    118

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    Quote Originally Posted by Croc View Post
    I can soooo relate to this frustration
    Me to but usually its the camera that i turned off instead of turning on!

  10. #20
    Join Date
    Feb 2009
    Location
    Sugar Land, TX
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    Hello. My name is Jeff, and I've been a lurker of this forum for a while as some day I hope to be a 7 owner.

    I've been reading this thread, as I too have been playing with POV cameras. I thoroughly enjoyed reading Croc evaluation of different cameras.

    I drive a BMW Z4 M coupe in autocross and track events. I have the Replay XD 1080HD, and like xcarguy I love the video quality, but it was a challenge to get great audio quality. I too found the windbreakers not to solve the wind noise issue. I got the Replay external mic, and tried it in all different positions. The best location I found is in the engine bay, and the second best is with the microphone clipped on the rear license plate pointed towards the exhaust.

    Here are some examples with the microphone mounted in the engine bay (gain setting at max 59 dB):
    http://youtu.be/OMA4O5Fxg0k
    http://youtu.be/6uRwH4yZ9k0

    And on the rear plate:
    http://youtu.be/PcA8_-Df_4U

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