I am not sure this is the


I am not sure this is the answer, but make sure you are not bringing the file back as an MP3 file.  I know that type file tends to drift. 

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The best audio and video recorders — 2020

In this article, we’ll cover the best external recorders for both video and audio recording. Then, we’ll go over the specs we considered when making our selections so that you can choose the best recorder for your...