Kurzweil K2500 - PERFORMANCE GUIDE REV F PART NUMBER 910252 CHAP 10 User Manual

MIDI, SCSI, and Sample Dumps
SCSI Guidelines
10-1
Chapter 10
MIDI, SCSI, and Sample Dumps
SCSI Guidelines
The following sections contain information on using SCSI with the K2500, as well as specific
sections dealing with the Mac and the K2500.
Disk Size Restrictions
The K2500 accepts hard disks with up to 2 gigabytes of storage capacity. If you attach an
unformatted disk that is larger than 2 gigabytes, the K2500 will still be able to format it, but
only as a 2 gigabyte disk. If you attach a formatted disk larger than 2 gigabytes, the K2500 will
not be able to work with it; you could reformat the disk, but this - of course - would erase the
disk entirely.
Configuring a SCSI Chain
Here are some basic guidelines to follow when configuring a SCSI chain:
1. According to the SCSI Specification, the maximum SCSI cable length is 6 meters (19.69').
You should limit the total length of all SCSI cables connecting external SCSI devices with
Kurzweil products to 17 feet (5.2 meters). To calculate the total SCSI cable length one
must add up the lengths of all SCSI cables, plus 8" for every external SCSI device
connected. No single cable length in the chain should exceed 8 feet.
2. The first and last device in the chain must be terminated.
The K2500 comes with SCSI termination enabled. You must disable this termination if the
K2500 will be in the middle of a SCSI chain or if you are installing a hard drive into the
K2500.
There are three ways to disable the K2500’s termination, depending on the manufacture
date of the unit. Newer K2500’s have an external "SCSI Termination Enable/Disable"
switch on the rear panel. Older K2500’s require either the removal of SCSI termination
resistors or a jumper setting; these modifications can only be performed by an authorized
service center.
Poor termination is a common cause of SCSI problems. Having more than two terminators
on the bus will overload the bus drivers, but this should not cause permanent damage to
the hardware. Poor termination can corrupt the data on your disk, however, as can bad
SCSI cables.
For the K2500R, if it is not located at one end of a SCSI chain all internal termination,
including the terminator resistor network on the K2500 Engine Board plus terminator
resistors in the internal SCSI drive must be removed. It is much simpler to just make sure
that the K2500 is at one end of the SCSI chain.
For a K2500 keyboard model, it must be at the end of the SCSI chain if it has an internal
disk drive.
A note about active termination - The K2500 uses active termination of the SCSI bus.
Active termination has some benefits over traditional passive termination. Some people
have positioned active termination as a panacea for SCSI problems, but this is more hype
than reality. Active terminators are available to be used at the end of one's SCSI chain and

Kurzweil K2500 - PERFORMANCE GUIDE REV F PART NUMBER 910252 CHAP 10 Specifications

General

Brand	Kurzweil
Model	K2500 - PERFORMANCE GUIDE REV F PART NUMBER 910252 CHAP 10
Category	Synthesizer
Language	English

Summary

SCSI Guidelines

Disk Size Restrictions

K2500 accepts hard disks up to 2GB; larger disks are formatted as 2GB.

Configuring a SCSI Chain

Guidelines for SCSI chain setup, including cable length, termination, and device IDs.

K2500 and Macintosh Computers

Sharing Drives and Bus Access

Discusses limitations and risks of sharing SCSI drives and bus access between K2500 and Mac.

Removable Media Drive Management

Mac cannot share drives with K2500; unmounting required for removable media.

Accessing a K2500 Internal Drive from the Mac

How to access internal K2500 hard drives using Mac software like Access PC.

The MIDI Sample Dump Standard

Loading Samples with the MIDI Standard Sample Dump

How to load samples into the K2500 using MIDI, including channel and destination ID settings.

Sample Number Mapping

Explains how sample numbers are mapped to K2500 IDs, including ROM sample limitations.

Getting Samples from the K2500 via MIDI

Procedures for transferring samples from the K2500 to a computer or sampler using MIDI.

Transferring Samples Between K2500 Units

How to transfer samples from one K2500 to another using MIDI.

Dumping Samples to a MIDI Data Recorder

How to dump samples from the K2500 to a MIDI data recorder.

Loading Samples from a MIDI Data Recorder

How to load samples into the K2500 from a MIDI data recorder.

Accessing a New K2500 Sample

Steps to access and use a newly loaded sample within the K2500's Keymap Editor.

Troubleshooting MIDI Sample Dumps

Common issues and solutions for MIDI sample loading and dumping failures.

MIDI Sample Dump Number Offset Issues

Addresses issues with sample number offsets in computer-based editing programs.

SMDI Sample Transfers

Using SMDI for faster sample transfers via SCSI, compared to MIDI.