If one of the plugs is wired incorrectly you can sometimes end up with a stereo signal that consists of an in-phase channel and an out-of-phase channel from a microphone. When you listen to this on a stereo setup - speakers or headphones - it will be fine (apart from phasing if you move around), but when the two channels are mixed they will cancel each other out, usually resulting in a very tinny sound.
This happens when a balanced audio source - one with three wires for in-phase, out-of-phase and earth, is connected as a stereo source, where the wires are connected to left, right, and earth. This often happens with mini-jack connectors on cameras. If you throw away one channel and mix the other to both sides the problem will go away, if this is the case. Stephen Dixon Digital Video Officer Museum Victoria ph +61 3 8341 7588 On 13/09/2013, at 6:27 AM, "Velazco, Katie" <VelazcoK at si.edu<mailto:VelazcoK at si.edu>> wrote: Hi Jana, Do you do any audio panning? Might want to try center panning all tracks to see if it fixes your problem. Katie Velazco New Media Project Specialist Office of Education and Outreach National Museum of Natural History Smithsonian Institution 202.633.1100 velazcok at si.edu<mailto:velazcok at si.edu> On 9/12/13 4:00 PM, "Jana Hill" <jana.hill at cartermuseum.org> wrote: We're having an audio/video issue and hoping someone on the list can help: Shooting video with a new camera (Canon M500) and a wireless mic setup (Samson UM1/77). Audio levels are good in the camera, sounds good through headphone jack on the camera, sounds normal in editing software, but once the final mp4 file is output and uploaded to an online service (Youtube or Vimeo), it sounds garbled on some Apple devices with built-in speakers (iPhone, some Macbooks, Mac Pro's built-in speakers). But the audio is OK if you plug in headphones or speakers on those devices. Audio is OK on computers (both Mac and PC) with external speakers and on iMacs. Using H.264 video codec and AAC-LC audio codec to output mp4 file, following Vimeo's current recommendations for bit rate and frame rate. Same problem is present with three different cameras, same mic setup. Any ideas/advice? Jana Hill Collection Information and Imaging Manager Amon Carter Museum of American Art 3501 Camp Bowie Blvd., Fort Worth, TX 76107 t: 817.989.5173 f: 817.665.4336 www.cartermuseum.org _______________________________________________ You are currently subscribed to mcn-l, the listserv of the Museum Computer Network (http://www.mcn.edu) To post to this list, send messages to: mcn-l at mcn.edu To unsubscribe or change mcn-l delivery options visit: http://mcn.edu/mailman/listinfo/mcn-l The MCN-L archives can be found at: http://mcn.edu/pipermail/mcn-l/ _______________________________________________ You are currently subscribed to mcn-l, the listserv of the Museum Computer Network (http://www.mcn.edu) To post to this list, send messages to: mcn-l at mcn.edu To unsubscribe or change mcn-l delivery options visit: http://mcn.edu/mailman/listinfo/mcn-l The MCN-L archives can be found at: http://mcn.edu/pipermail/mcn-l/ Museums Board of Victoria ABN 63 640 679 155 is endorsed as a Deductible Gift Recipient. All gifts of $2 or more are tax deductible. [http://museumvictoria.com.au/images/email-fp2.jpg] Melbourne Museum, winner of the Victorian Tourism Awards for Best Major Tourist Attraction in 2010,2011,2012 and Australian winner in 2011. museumvictoria.com.au<http://museumvictoria.com.au/> This e-mail is solely for the named addressee and may be confidential. You should only read, disclose, transmit, copy, distribute, act in reliance on or commercialise the contents if you are authorised to do so. If you are not the intended recipient of this e-mail, please notify postmaster at museum.vic.gov.au<mailto:npostmaster at museum.vic.gov.au> by email immediately, or notify the sender and then destroy any copy of this message. Views expressed in this email are those of the individual sender, except where specifically stated to be those of an officer of Museum Victoria. Museum Victoria does not represent, warrant or guarantee that the integrity of this communication has been maintained nor that it is free from errors, virus or interference. Please consider the environment before printing this email.
