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


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