The S-550 and S-330 digital samplers are 12-bit mono samplers which were first made in 1987. The S-550 is eight part multitimbral with a memory capacity of 64 Tones and 32 Patches. Its total sampling time is 28.8 seconds at 30kHz. The last operating system for the S-550 was the CD-5 system, which was included with the Roland CD-5 CD-ROM player. The S-330 is eight part multitimbral with a memory capacity of 32 Tones and 16 Patches. Its total sampling time is 14.4 seconds at 30kHz.The last operating system for the S-330 was version 1.03. This document is intended to provide a step by step guide to a few of the S-330/550's most commonly used procedures. First, we will show you how to create a Performance disk. Next, we will discuss some of the features added with the CD-5 operating system. Then, we will create a Patch and show you how you can conserve memory by using Sub Tones. Next, we will show you the basic sampling procedure. Finally, we will discuss the use of external SCSI devices with the S-550 and provide a list of compatible peripheral devices. It is our hope that you will find this document a useful companion to the Owner's Manual.