I'd say that 16 samples is doable. I think the most efficient way is make kind of a "sample train".
By that I mean having 16 samples in the same wavefile and load that file to a table. Then you offset into the table to read each of the 16 samples.
If you have some samples that you want to combine into a single wav file, I think the easiest way is to use a DAW.
This needs to be kind of specific, so here comes an explanation on the technical side:
Tablesizes and setting a bpm in DAW to fit Axolotis table sizes perfectly:
Axolotis table size are set by the power of 2. So table sizes can be in sample 2, 4, 8, 16, 32, 64........ 2048, 4096, 8192.......... 262144 samples long. And so on.
If you for example want to make a file in the DAW that fits Axolotis tablesize 262144 samples perfectly, you can set the DAWs BPM to 175,7813 bpm(Precisely!!!!) and set the length of the loop you bounce from the DAW to 4 bars.
its also important that you set the DAW to 48khz sample rate, cause thats what Axoloti is using.
So if you bounce a loop of 4 bars, at 48khz at 175,7813 bpm you will end up with a file that is exactly 262144 samples long, which is perfect for Axoloti
That will only give you a 1/4 length for each of the 16 sample slices. I know it's not very long, but for short drum hits it can work okay. If you want to get longer sample slices, you just expand the loop you render to longer, like 8 bars (524288 samples), then you get 1/2(half bar) for each sample slice, if you render 16 bars(1048576 samples) you get a full bar for each sample slice....... And so on..........
It does take some work, but it's pretty efficient method, cause you have done all the math BEFORE adding the file to Axoloti, Axoloti really just have to play them back and not do any calculations.
Then to play back each of the sample slices, you can use my sample slicer, which is explained here:
Here is a snapshot how it can be used, but I recommend reading the description in the above link. I am pretty proud of this object, it's pretty light on cpu and when making the sample train as described above you get a lot of bang for the buck
Hope this makes any sense........
Have a nice weekend!