Akai DPS12 Frequently Asked Questions

Backing Up

 DAT Backups / Stand-alone CD Recorders

Backing up to DAT requires digital connections to just about any DAT machine. The DPS12 has optical (TOSLINK) digital ports, but most DAT machines have phono (S/PDIF) connections. To link these, you'll need a relatively inexpensive convertor box. I use a Fostex COP-1, but there are other ones made by quite a few companies, MIDIMAN and Friendchip to name but two.

Once the connections are sorted out, there's little else to do but select "BACKUP" and "DAT", choose your sample rate and hit record on the DAT recorder. You can also use any other digital recorder capable of recording from its S/PDIF or TOSLINK inputs.

This backup procedure is also what you use if you have a Phillips CDR880 (or other stand-alone CD recorder). One improtant thing to note is that although this works with the 880, it WON'T work with the Phillips CDR870, as apparently this always sample rate converts the incoming signal, even if it doesn't need to, and this interferes with the backup process. The 880 has TOSLINK connectors and so does not need a convertor box, it can be connected directly with a pair of TOSLINK optical cables (you can get these from any hifi store or good music retailer).

Make sure though that you select "44.1KHz" for the backup speed, as this is the only sample rate that can be written bit-for-bit to CD. If you select any other rate, the CDR will sample-rate-convert the incoming digital signal in order to convert it to the necessary 44.1KHz sample rate required for CD, effectively corrupting the headers and changing the audio - basically, you won't be able to reload the backed up data. For more information on sample rates, see the sample rate question on the miscellaneous page.

It's also possible to backup to another DPS12 using this method. Simply connect the digital I/O with optical cables, select DAT backup on the source machine, and DAT reload on the destination machine. The selected project will be copied to the second machine, with all parameters intact.

 SCSI Hard Drives

Backing up to a SCSI hard drive or removable drive is a similar procedure to backing up to DAT, but in addition you need to select the SCSI ID of the device you're backing up to. Prior to V2.0, you could only backup ONE project per disk - so if you had a 200 meg project, and you backed it up to a 4 gigabyte drive, you would be wasting most of the drive's space! V2.0 sorts this out, and offers an "append" function, letting you backup multiple projects up to the drive's size limit. SCSI backups are generally much quicker than backing up to DAT.

 CD-R/CD-RW

For stand alone CD-R machines you should use the "DAT" backup function described above (and for all backups via the digital in/outputs). Backing up to a SCSI CD-R is identical to the SCSI backup mentioned above - you simply select the SCSI ID of the CD-R to write to.

 SCSI Tape Drives

SCSI tape drives are currently not supported at this time. The DPS12 will find a connected tape drive on the SCSI bus, but will not read or write to it. Tape drive support is apparently on Akai's wishlist though, so it may well appear in a future update.

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Akai DPS12 Frequently Asked Questions - Copyright Ben Hall 1999
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