Andrei
18-08-2004, 00:08
as i promissed :)
you have to use cool edit.
first of all extract a one track from the cd (in *.wav) with EAC (you can download it here http://www.exactaudiocopy.de/ - every good lossless trader uses this software to save the tracks from audio cd to pc)
then you have to open cool edit -> insert wav
then you have to click on: "switch to singlewaveform view"
then alalyze->frequency analysis this is what you see
Lossless CDR (http://lampix.htl-tex.ac.at/~aum2003/bsp2.jpg)
why ? well, forget "dB" on the right side, look at the Hz, you have 20-20000 Hz (what a human ear can hear) and everywhere from 20-20000 theres a sound
now the example of mp3 burned as audio cd (received it today from a trade :verymad: )
Mp3-Sourced CDR (http://lampix.htl-tex.ac.at/~aum2003/bsp1.jpg)
you see, it goes only till 12000 Hz (that's why mp3 are so small, the cut the 8000 Hz)
well, but there are many other examples. there are fm-broadcasts, webcasts (i think even worse, than mp3s), mini disc sourced shows (i think they go till 16000Hz) etc. the best source is DAT, it has 48,1 kHz (even better, than CD with 44,1 kHz), but don't forget, we can only here from 20 to 20000 Hz :)
the one example is my digital voice recording thing (don't know exact name). i made a short recording and converted it to wav and here's what frequency analysis showed
Digital Voice Recording thing (http://lampix.htl-tex.ac.at/~aum2003/bsp3.jpg)
you see, it goes only till 8000 Hz
hope it helps :)
you have to use cool edit.
first of all extract a one track from the cd (in *.wav) with EAC (you can download it here http://www.exactaudiocopy.de/ - every good lossless trader uses this software to save the tracks from audio cd to pc)
then you have to open cool edit -> insert wav
then you have to click on: "switch to singlewaveform view"
then alalyze->frequency analysis this is what you see
Lossless CDR (http://lampix.htl-tex.ac.at/~aum2003/bsp2.jpg)
why ? well, forget "dB" on the right side, look at the Hz, you have 20-20000 Hz (what a human ear can hear) and everywhere from 20-20000 theres a sound
now the example of mp3 burned as audio cd (received it today from a trade :verymad: )
Mp3-Sourced CDR (http://lampix.htl-tex.ac.at/~aum2003/bsp1.jpg)
you see, it goes only till 12000 Hz (that's why mp3 are so small, the cut the 8000 Hz)
well, but there are many other examples. there are fm-broadcasts, webcasts (i think even worse, than mp3s), mini disc sourced shows (i think they go till 16000Hz) etc. the best source is DAT, it has 48,1 kHz (even better, than CD with 44,1 kHz), but don't forget, we can only here from 20 to 20000 Hz :)
the one example is my digital voice recording thing (don't know exact name). i made a short recording and converted it to wav and here's what frequency analysis showed
Digital Voice Recording thing (http://lampix.htl-tex.ac.at/~aum2003/bsp3.jpg)
you see, it goes only till 8000 Hz
hope it helps :)