Then it will use various methods of analysis and re-reading to ensure that the data was read as correctly as possible.
#MAX FOR MAC CD RIPPER SOFTWARE#
Ripping software that claims to have "secure ripping" will take into account the capabilities and limitations of the drive, and will make the drive read each sector multiple times.
Or the data might be the same each time, but is different when obtained from a different drive. That is, every CD drive will give the ripping software 2352 bytes of data for each block the drive is told to read, but that data might be different each time, due to physical problems with the disc or limitations of the drive's hardware. And there's actually a lot of variation in whether each drive can reliably and accurately go to the spot it's told to read, and in the way it detects, reports, and handles errors, such as those caused by scratches. This sounds simple, but it becomes complicated when parts of the CD can't be read accurately, for example due to scratches. The software saves that incoming data into an audio file (WAV or AIFF format, usually, as those formats are almost identical to the data coming in from the drive), or the software streams the data into another audio encoder "on the fly", so the user doesn't have to convert it to another format like MP3 in a separate step. On an ordinary audio CD, each block is 2352 bytes and corresponds to 1/75th of a second of sound. The basic function of ripping software is to get the CD's table of contents (an index of track start positions), and then for each track to be ripped, it tells the CD drive to go to the beginning of each of the track's data blocks (sectors) and read them in, one at a time. and comparing checksums of extracted audio with those obtained by others.
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