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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.
 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.
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