Creating a polyphonic multisampler in RNBO

Hi,

I want to code a polyphonic multisampler in RNBO. I entend to have 6 voices of polyphony and 1 audio file per key (so basically around 80 audio files per preset).

So far, my first idea was to work with buffer~ and multibuffer~ but it seems to be a bad idea because:
- that would mean 80 or more buffers.
- it would be quite complex to make them read another 80 .wav every time I change the preset.

Is there some other object that would work and be more practical to upload new .wav everytime I change of preset?

BTW, I added polyphony to the RNBO patch, no problem. But then I thought that it would be stupid that every voice has to load the 80 buffers so I reduced polyphony to 0, put the buffers in the top patch and made a subpatch containing the multibuffer~ and added polyphony. At this point, the multibuffer doesn't read the buffer (in the top patch) anymore. Do you know why?