First please read this post and give us ALL the information requested there; you haven't told us anything about your computer nor even the version of VPX which you are running!
Can you find, download and install the free MediaInfo utility and then point it to one of your .mts files. Post the results to any reply.
One thing to check: does the audio sampling frequency of your files match what VPX is set to use? Normally this will be 48kHz but could be 44.1kHz.
Also, is the audio of your files recorded in some kind of "surround" format?
But please answer ALL the questions in my post. We still know very little about your computer. Did you follow the advice to have MediaInfo check the details of your files? Have you ensured that VPX and your video files have the same audio sampling rate?
The fact that Studio 21 can successfully play your files is, unfortunately, no help in diagnosing what the problem is with VPX.
===================== General ===================== Id : 0 (0x0) Complete name : H:\Import Video Data\TVD_AVCHD\20171212\20171212\20171212194812.mts Format : BDAV Format info : Blu-ray Video File size : 1.91 GB Duration (ms) : 11mn 21s OverallBitRate_Mode/String : Variable Total bitrate : 24.0 Mbps OverallBitRate_Maximum/Stri : 24.0 Mbps
===================== Video ===================== Id : 4113 (0x1011) MenuID/String : 1 (0x1) Format : AVC Format info : Advanced Video Codec Format profile : High@L4.0 Use of CABAC : Yes RefFrames : 2 frames Format settings - GOP : M=3, N=12 Codec Id : 27 Duration (ms) : 11mn 21s Bitrate mode : Variable Bitrate : 22.7 Mbps Width : 1 920 pixels Height : 1 080 pixels Aspect ratio : 16:9 Framerate : 25.000 fps Colorimetry : YUV Colos space : 4:2:0 Bit depth : 8 bits Scan type : Interlaced ScanOrder/String : Top Field First Bits/(Pixel*Frame) : 0.438 Stream size : 1.81 GB (95%)
===================== Audio ===================== Id : 4352 (0x1100) MenuID/String : 1 (0x1) Format : AC-3 Format info : Audio Coding 3 Format settings mode extens : CM (complete main) Format_Settings_Endianness : Big Codec Id : 129 Duration (ms) : 11mn 21s Bitrate mode : Constant Bitrate : 256 Kbps Channel(s) : 2 channels ChannelPositions : Front: L R Sampling rate : 48.0 KHz Bit depth : 16 bits Compression_Mode/String : Lossy Video_Delay/String : -80ms Stream size : 20.8 MB (1%)
Info from magix media properties
Name: 20171212194812.mts Play time: 00h 11min 21s 3 Frames Filename: H:\Import Video Data\TVD_AVCHD\20171212\20171212\20171212194812.mts File Size: 1.91 GiB File play time: 00h 11min 21s 3 Frames Date: 12.12.2017 19:59:34 Software: Copyright: Comment: Resolution: 1920 x 1080 pixel Ratio: 16:9 Import module: MPEG Import Module Frame rate: 25.00 frames/s Color depth: 8 bit Color sampling: 4:2:0 Color profile: n.a. Camera lookup table: Scene: Take: Initial tempo: --- Source of time information: Couldn't find out the tempo of that sample. Total: 0.0 Arrangement: 0.0 User (Time Processor Effects): Total: User (Time Processor Effects): Record datetime: 12-12-2017 19:52:17 Record datetime: 12-12-2017 19:52:17 Iris position in terms of F number: 3 Automatic gain control: 6 White balance mode: 7 Focus mode: Manual focus Vertical panning direction: The opposite direction of the vertical scanning Image stabilizer: Off Horizontal panning direction: The opposite direction to the horizontal scanning Electric Zoom: Off Magnification of electric zoom: 8.5 Shutter speed: 1/59 Maker: 4113 Camera model name: 12803
Can you post a short eg 10 sec clip, with audio, from the camera up to somewhere like Dropbox for us to test - do not post it to the forum, Youtube, Vimeo etc as they will convert the file - we need the file to be as you have it.
Thanks for the file. But you were asked to post a "short eg 10 second clip". It's currently downloading to my machine and is already at 265 MB as a zipped file! Thankfully I have quite a fast internet connection; other users may not! I assume from the OneDrive listing you have actually posted the entire 4 minutes 11 seconds file?
Jeff
Later Edit: the download failed, due to a "Network Error" when it was just slightly less than 500MB! You cannot seriously expect users to download a file of such a size. Please export a short range from the file, about 10 seconds, that demonstrates the problem and then post that to OneDrive and provide the link here.
If you are not seeing anything then there is no audio being imported.
Try the following - right click the video portion of ythe clip and select Audio functions, Restore original sound - if this option is not there then you have the original sound imported.
Can you also post a screenshot of the Program settings (Y key) , Video/audio tab