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[email protected] gyansorova@gmail.com is offline
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Default How can I tell music has been an MP3? Quantitative Measurement of Fidelity

On Jun 23, 10:18 am, Dave wrote:
I have been disappointed with the audio quality of some CDs I have
bought recently. Is there a free program I can use to get an accepted
measurement of fidelity? (like a signal to noise ratio)

I have my suspicious that some may have been stored an MP3s and then
"unripped" in the factory. So how can I tell for certain if my CD has
been an MP3, or other lossy format? I'd hope mp3 storage would leave
different markers than the original tape, for example.

To get a good measure I'd expect some Fourier transforms and signal
analysis to be done, so this should be relevant to sci.physics.


The SNR or more correctly the signal to quantization noise level
depends on the sampler. For N bits it is approx 6N. So for 16 bits it
is 96dB. You will never hear the quantization noise. Compression is a
different matter