| Subject: | Re: Digital Compression - was New SSM |
|---|---|
| From: | madl74 |
| Date: | Wed Jul 10, 2013 5:13 pm ((PDT)) |
> Has anyone else found that preparing a track in advance for the MP3 128 k= bps compression by filtering complex high frequency content above around 14= kHz in can help avoid bad sounding MP3 artifacts? John, Yes, and I have an explanation. Sounds with high harmonics compress relatively well, but "complex" high frequency content has to be reduced to= spot frequencies which have to be regenerated but not necessarily with a similar waveform to the original. This works OK with "pop" music where the high end is usually percussion and= if you listen to the output of the tweeters alone, it can be a mess. This doesn't matter if it is a rhythmic mess. See my other mail. :-) David Brinicombe |
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