On Sat, 16 Nov 2002, Mike Brown wrote: > I've been running a SHOUTcast broadcast at 96 kbps for the past year. I keep > using an old version of the SHOUTcast DSP for Winamp because I want to use the > Radium FhG codec; newer versions only support the LAME DLL, and that DLL's > default settings at 96 kbps apparently produce disturbingly bad artifacts in > the upper midrange. > > Last week I decided to do some comparison between the codecs. I compared live > frequency analysis graphs for a particular selection of music (a fairly busy > snippet of Duran Duran's "Hold Back The Rain" remix/Night Version) as it went > through different encoder settings. > > I know this isn't the right forum for discussing what's the better encoder, so > I won't bother reproducing all my observations here. My main concern is just > to see why Radium's true stereo 96 kbps default was producing much less > artifact-y sound than the 96 kbps default settings for LAME (even with -q 0) > as well as the LAME DLL as invoked by SHOUTcast. > > Long story not-so-long, you can pretty closely reproduce Radium's performance > with LAME on the command line with something like > "lame -m s -b 96 -q 0 --lowpass 10.5 --resample 44.1". > You can push the lowpass up to 12 for a noticeable improvement beyond this. > > For reasons I don't understand, the LAME defaults for 96 kbps seem to be to > produce 32 kHz output sample rate, with a 12 kHz lowpass, and lower quality > settings, and this seems to make all the difference in the world. I don't know > how the SHOUTcast folks are setting the DLL, but it seems to produce the same > substandard results. > > So I guess what I'm suggesting is that some improvements be made to the > default settings for 96 kbps in the DLL, if not everywhere, so that it is at > least on par with Radium, if not better. At least that way, SHOUTcast can use > the default and not sound so poor. The equivalent of > -m s -b 96 -q 0 --lowpass 12 --resample 44.1, or something close to that, is > what I propose.
Mike, earlier this week I had a problem with a 56k feed. Gabriel came up with what may be the solution for me. I knew I had a few that needed to be redone so I'm doing those now. Since you're streaming this, why not try --alt-preset 96 and see how that does. It's similar to what I tried. Vince. -- http://www.meanstreamradio.com http://www.unknown-artists.com Internet radio: It's not file sharing, it's just radio. _______________________________________________ mp3encoder mailing list [EMAIL PROTECTED] http://minnie.tuhs.org/mailman/listinfo/mp3encoder
