DPX1- Operations

Oberheim DPX-1 : Operating Instructions

Overview The Oberheim DPX-1 has a very simple operating system which is controlled by the 5 front panel buttons.

Disk Loading Place the diskette you wish to load into either the 3.5" or 5.25" drive. The DPX1 will always load from the 3,5" drive first (if there is a diskette in it!). Now press the LOAD DISK button once. The DPX1 will now load the samples, and the BUSY LED will light up. The 2 character LED display will quickly show the host sampler and display:

E2 = Emulator II
A9 = Akai 900
P2 = Prophet 2000, 2002/2002+
En = Ensoniq Mirage
Cd = CDROM
UF = Sample Dump

Once the sample has loaded it will be ready to play, unless it is 8-bit sample - in which case the DPX1 will process it into a 12-bit sample. This conversion takes the Motorola 68000 microprocessor about 30 seconds (the BUSY LED will remain lit until the processing is complete). The DPX1 will then provide Bank 0 as the active sound set.

DPX1 Functions Function Select Six options can be sequentially selected by using the function select button.

Patch Select Select this option with the function select button, and then select the bank you wish to use (00 - 99) with the INCREMENT/ DECREMENT buttons, followed by ENTER. There will be a decimal place next to the bank number if it is not the current bank.

MIDI Channel Select this option with the function select button. The current MIDI channel will be displayed (1-16, On for omni). You can change the setting by using the INCREMENT/DECREMENT buttons, followed by ENTER. You will need to save this setting to disk, as MIDI channel is disk specific and it is not stored as a generic parameter within the DPX1. The BUSY LED will light when the DPX1 receives MIDI information (e.g. notes).

Display The 2 character LED displays the following messages:

Ld = Loading Diskette
nd = No Disk
on = Selected Paramter is Enbaled or Omni
off = Selected parameter is disabled
bd = Blank Disk
nb = Not Blank Disk
nF = No Format
Pd = Protected Disk
bS = Bad Sample
dE = Disk Error
SE = MIDI Sample Error
iE = Internal Error
2.2 = operating system version number MIDI information (e.g. notes).

Fine Tune Select this option with the function select button. The DPX-1 can have its tuning adjusted. There are six options which are selected by the INCREMENT/DECREMENT keys followed by the ENTER key:

pi = Oscillator Pitch
Fi = Filter cut-off adjustment
tn = Transpose Note 2.2 feature only
tr = Transpose Range 2.2 feature only
tS = Transpose Sample 2.2 feature only

Each tuning control can be adjusted from 00-99 (50 is the mid point and default) using the INCREMENT/DECREMENT keys, remembering to press ENTER to save the adjustment to disk.

Data Dump Select this option with the function select button. The DPX1 can dump its sample memory to a 3.5" diskette or over MIDI. There are three options which are selected by the INCREMENT/DECREMENT keys, followed by the ENTER key:

dd = Data Dump - save memory to diskette
SP = Save Parameters - Press ENTER to write current configuration parameters to a backup disk containing sample data
Sd = MIDI sample dump receive/transmit
AL = All ememory ready for MIDI sample dumping

MIDI Controller Select this option with the function select button. There are two options which are selected by the INCREMENT/
DECREMENT keys, followed by the ENTER key:

CE = midi controller enable - the DPX1 will respond to midi controllers such as pitch bend, vibrato, volume, sustain and pressure
EC = midi echo - combines information generated by the DPX1 (i.e. patch change) and the data received from midi in and sends it via the OUT port

Extended Function Select this option with the function select button. There are three options which can be selected by the INCREMENT/DECREMENT keys, followed by the ENTER key:

Fd = formats and verifies a DS/DD 3.5" diskette
Filter Limit = enables/disables filter tracking
Ld = load diskette
do = dual oscillator mode (for the Mirage only)
2.2 = operating system version number

OS Version 2.1 and 2.2 will format DS/HDDiskettes, very useful.