dunno if any of this helps...
two software programs which seem to work with dpx1 are non mac:(
sample vision
http://glenstegner.com/dss1/sv.htmand sample wrench (info
http://www.dissidents.com/frequent.htm)
also sample design seems to work which is mac:
http://archive.is/CvoWEhttps://sites.google.com/site/analogvocoderinfo/sampling/oberheim-dpx-1SDS Implementation.
Only two kinds of MIDI data ever leave the DPX-1's MlDI out port: frontpanel program changes and sample dumps. Oberheim's inclusion of sample dump standard (SDS) implementation adds a substantial amount of power to the unit
The SDS allows you to port in raw samples from any machine that transmits sample data in the standard format, and to send this data to any machine equipped to receive it in this way, the DPX-1 '5 sound library is as large as the combined libraries of all machines capable of speaking in SDS lingo. Originally, the unit could only send and receive bulk sample dumps, but software version 1.3 allows it to deal with samples one at a time via SDS. This makes the DPX-1 a convenient medium for the digital transfer of samples between CDROM and samplers that speak SDS but are not equipped with the CD-ROM option.
Interestingly, the standard provides for the transmission of sample data only, and not for the settings of analog devices commonly used to modify sampled sounds. These may include amplifier and filter envelopes, LFO routings and amounts, velocity routings and amounts, and keyboard setups. This definitely limits the usefulness of sample dumps
as far as the DPX-1 is concerned, although it's conceivable that Oberheim might eventually come up with a system-exclusive implementation that would allow you to modify dumped-in samples with the unit's internal filters and amplifers. Given the design of the SDS, the DPX-1 keeps its filters and amplifiers wide open for samples that come via MIDI. Middle C is automatically assigned to play the sample back at Its original rate, and, of course, the sample's pitch is distributed properly over the MIDI note range. (It's also worth noting that the standard allows for only one loop, and that Prophet samples may have two. If so, only the sustain loop is transmitted/received.)