sorry, I actually meant just the audio memory of the delay times, nothing else, because they are soo short
I've taken a look to the Service manual of the MPX-1 and I've supposed that only by changing the resident DRAMs with more capable ones, I could increase the audio memory for the delay times
but, after contacting the Lexicon staff, they said me that it would be useless to change the resident DRAMs, because the DSP can't reads the memory upgrade.
I would invest in a project to upgrade the MPX-1's DSP with a new frimware, so that it will be able to achieve much more delay times..
who knows if there is someone which could help me to do that.