Sound quality: How to really know?

[Higor]

For example,

How do i know if a file is a true Wav and not an MP3 that was converted in a WAV?
Is there a way?

Thanks

[messy-jesse]

Right click; properties?

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[Marco Raaphorst]

Only by listening you should be able to find out about it.

I notice a lot of stuff on Spotify is using low res audio files.

[avasopht]

http://tausoft.org/wiki/True_Audio_Checker_Downloads

[Higor]

Thanks for the replies.
I've found more tools to help check the audio: