To Master
You are totally right and agree with you,but:My opinion is;Always go with 1 step more ahead.Becouse you might doit with bad software>>cut it on 17khz,and find out after is done that is 15 khz instead.Thisway you doit on 18 to 19khz>>and even with not perfect mp3 engine you should get between 16 to 17 Khz,which is as Master said above more than enough.Btw for new people,who dont know,it comes down with age,so if you are 40 or older you can safely go down>>they are good frequenzy filters in> lame>>Razorlame<<and they are pretty accurate.Since you know your stuff,i know that you will not make this mistake with mp3,but for new users who just start to experimenting with i think its a good way to go>>they might go with fra.,which is good encoder in my eyes..only had a problems with highs,and could make a difference.I remember that i did check frequenzy range,but cannot remember hov much it was>>somewhere around 16 to 18 khz i think,and i remember that lame came to 22 khz>>checked with soundforge and cooledit pro and both shoved almost the same.Since i didnt do further experiments with fra. i really dont know how would he act>>possibillites are endlless if we reduce it to 17 khz,he might go to 15 only or who knows what, and only good testing can give accurate results>>since there is not safe way to predict this....And YES,Lame is the way to go,as all people saying