Hi. I am not a programmer, but an avid user of Lame. I can tell you that the various cbr settings use different high frequency cutoffs in order to devote bits to more audible frequencies. CBR 128 cuts out between 15 and 16Khz. CBR 192 is I believe around 18khz.
You can override these cutoffs by adding --lowpass (n) to your command line. The preset lowpasses were arrived at by very careful listening tests on demanding material in order to maximize OVERALL quality. Xing apparantly does not use this type of quality control. Try encoding a test file like velvet.wav to hear the difference. ----Original Message Follows---- From: Puschel Puschel <[EMAIL PROTECTED]> Reply-To: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: [MP3 ENCODER] audible high frequency is cut @ 128 cbr Date: Tue, 25 Dec 2001 12:04:06 +0100 Hi I just stumbled in so forgive me when this was already posted. I have encoded a track which already on the original CD has some very annoying high frequency beeping (german: "eklig hohes fiepen") on it. With 128 cbr -m j -h the beeping is gone. While Xing 128 cbr stereo keeps it. In this case this is very nice behaviour of Lame :), but I think that leads to the conclusion, that audible high frequency sounds are just cut off. And the characteristics of many instruments probably suffer. With 160 cbr -m j -h the beeping is audible, but weaker. And with 192 I don't hear a difference anymore. I know that mp3-encodeing is compression and information is lost during the process but wasn't it meant to be: only "non-hearable information" ? And I thought 128 kbit/s was enough to keep an image of the CD sound. So if this loss of information is tolerable @128+160 -->> nevermind :) If not and you think I have found something that should/should not be there -->> The song was Nux Vomica from the Squarepusher. If interested I can send you part of it @ 320 cbr. Greetings Jo. _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com _______________________________________________ mp3encoder mailing list [EMAIL PROTECTED] http://minnie.tuhs.org/mailman/listinfo/mp3encoder _________________________________________________________________ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx _______________________________________________ mp3encoder mailing list [EMAIL PROTECTED] http://minnie.tuhs.org/mailman/listinfo/mp3encoder
