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Title: Audible differences from ripping Post by: xp9433 on October 20, 2009, 04:10:25 am Peter
I thought this discussion may be of interest here: http://www.audioasylum.com/cgi/vt.mpl?f=pcaudio&m=62713 and the part on audible differences from track offsets http://www.audioasylum.com/forums/pcaudio/messages/6/62733.html Cheers Frank Title: Re: Audible differences from ripping Post by: PeterSt on October 20, 2009, 08:55:00 am Thank you Frank.
I guess Steve is always hunting the offset (at ripping) phenomenon, and maybe at one day something will come from it. I myself immediately thought of the filtering (which IMO makes ALL the samples in the output file different for an IIR filter), but I saw the idea was brought up already and next it was told that the same counts for NOS DACs as well. In the end there is some more going on, like preringing in the electrical area (so, pure physics). When there is more time of silence before the first transient starts, the preringing is able to do its job "in time" (whatever that means). Now cut out the silence, and the preringing can't happen. These two situations have all kind of effects, like overshooting in the former case which won't happen in the latter, but the latter not exploiting a fully developed transient (there was no "sling time" (?) time to sweep it up). The effects of this can last quite long (think of hundres of samples), and possibly they keep influencing throughout. It's like a chain reaction. My means of measuring (ever to go public ?) showed all kind of effects which surprised at least me, and which all lead to a relative very long lasting effect of a, say, pulse. It just gets incorporated in these hunderds of samples, which by themselves have other resulting effects because of that. It could work throughout with only one trigger at the start ... Peter |