On 03/09/2020 09:51 PM, Rick Keniuk wrote:
You found it Ted... FFPLAY interprets a mono (single channel WAV) file to be played at -3dB from full scale while the other programs set the mono file at full scale on both stereo channels. I simply modified my Matlab code to generate a stereo file with identical channels (from the original single channel data) and that fixed it. I guess they are "power dividing" the single channel signal. I don't think I agree with FFPLAY's interpretation of the amplitude of a single channel WAV file but that is what is happening. Maybe there is a configuration to fix this effect.
You know, Rick, if you think about it, what ffplay does is actually pretty smart -- sound pressure level of dual-mono == sound pressure level of single channel).
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