Prophet 3000 Sounds, Parts & Manuals

The 2-Meg Prophet 3000 was SEQUENTIAL's last Prophet. It delivers 10.6 seconds of 16-bit stereo sampling at a rate of 48 kHz, or 21.2 seconds in mono. It is recognized as the world's easiest to operate digital sampler  
Options available include SCSI hard disk drives, a large library of sampled sounds, special memory expansion kits increasing overall sample memory to 4-megabytes, plus survival kits & a service diagnostics software disk.

Prophet^tm 3000 custom IC No Longer Available!

The Sequential^tm I-627 Rev.A, PGA style voice output custom IC, is a complex chip that converts sound RAM data into data for all of the voices, adjusts sample playback for the desired pitch, controls sample start/end/looping points, synchs the playback of stereo channels, & controls refresh for the dynamic sound RAM.

The I-627 Rev.A PGA chip was also intended to adjust for different RAM chip configurations. Unfortunately, a design flaw in the I-627 Rev.A custom PGA IC failed to accomplish this task.

Nearly all Prophet^tm 3000s were manufactured with the PGA style I-627 Rev.A. Because of this design flaw, nearly all Prophet ^tm 3000s are unable to expand the sample memory to 4-Megabytes of RAM or beyond. The redesigned I-627 Rev.B PLCC style custom IC corrects this flaw. The I-627 Rev.B allows the Prophet^tm 3000 to recognize the presence of the 16 DRAM (#I-090) memory ICs when installed into the 16 empty sockets located on the Prophet^tm 3000's main. PC board (as originally intended). Unfortunately, replacing the I-627 Rev.A GA style IC with an I-627 Rev.B PLCC style IC is an extremely complicated modification that lacks any clear & precise technical documentation. However, since the I-627 Rev.A PGA style IC is no longer available, installing the I-627 Rev.B PLCC style IC is the only possible alternative in the event of an I-627 Rev.A PGA IC failure.