Nu, bár kicsit off, de bötüzz mégeccer...:
ASPI is a relatively new way of reading data from a music CD. Originally it was devised for use with SCSI units but often works well with IDE CD-ROMs. (via a command set known as ATAPI.)
Certain versions of ASPI however don't seem to be able to detect IDE CD-ROMs. It appears that the wnaspi32.dll file between versions 4.01 and 4.53 doesn't work with IDE. Earlier and later versions do work though. To see which version is installed on your computer, right click on it with the mouse and chose properties, version.
Windows 95/98 originally came with a version of ASPI that worked with both SCSI and IDE. Unfortunately this is not the case with Windows NT and one is forced to install your own. If you don't have one read these instructions on how to obtain one. Audiograbber 1.62 and higher can now translate the ASPI commands and let Windows NT and 2000 internally send the calls to the drive instead so an ASPI manager is no longer needed. An ASPI manager is still slightly better because it can handle more than one call at a time.
The configurations needed by Audiograbber to read via ASPI are as follows:
· Call drive via. Choose if you want to let the ASPI manager send the commands to the CD-ROM drive or if Windows NT shall do it instead. The ASPI manager option is normally always available in Windows 95/98 but not in Windows NT. You need to manually install an ASPI manager in NT to enable this option. The Win NT/2000 calls option is never available in Windows 95/98 but is supposed to always be available in Win NT/2000. ASPI manager is theoretically slightly better to use.
· CD-ROM unit. The CD readers that Audiograbber has detected via the ASPI interface are displayed here.
· CD ROM type. The command set to be used for the CD reader . Unfortunately, different CD readers use ASPI calls in different ways. All IDE CD readers use ASPI calls in the same way. This is not the case with SCSI units. Those SCSI CD readers that are recognized are listed with the correct drive type. Unrecognized readers are listed as SONY by default (As SONY is the most common.) If however your SCSI drive doesn't work, you can try another call method. If no call method works, send an e-mail to your CD-ROM manufacturer and ask them to send a description of their command set for audio extraction to me.
· Rip method.
Buffered Burst copy means that no overlapping or synchronization occurs. This is the fastest method of copying and should be attempted first. With this method it's important that the CD reader is requested for data continuously. As long as the reader doesn't need to reposition it's head and Audiograbber asks for 3 seconds of music and processes all the data in step with the process, this shouldn't be a problem. Directly after the reader has delivered some frames, Audiograbber requests some new ones, in this way a schedule of 3 seconds is maintained. If Audiograbber (or the computer) is unable to process the incoming data, the 3 second buffer will diminish. If the buffer is reduced to 0 a "possible speed problem" will occur, which generally means that the reader has been "idle" for a time. A "possible speed problem" doesn't necessarily mean that there is a problem, it is only a warning signal. If the CD reader reads at 8x speed Audiograbber's buffer will be filled in less than 0.4 seconds. It is therefore important that no other program interferes. The slower the reading speed is, the less danger the buffer underrun is exposed to.
Unbuffered Burst copy is basically the same as buffered burst copy but the CD-ROM drive is never asked for more than one block at a time. Theoretically the buffered burst should be better but testings have proven that this copy method is better for some drives.
Dynamic synch width means that sector synchronization is occurring. The buffer that's used to synchronize the previously read block is dynamic and grows or reduces in size as required. If synchronization fails, Audiograbber re attempts the process with a slightly larger overlap area.
Fixed synch width means that a set amount of frames are used for sector synchronizing. Some CD readers seem to work best with this alternative, though theoretically dynamic synch width should yield the best results. "When in the real world ........... "
