Changed topic type to Question, since you ask one. And moved from Programming Question, since the question is specialized.
Perhaps there is a built-in limitation in Minim (32 is a suspiciously round (in computing terms) number), but perhaps showing how you load and play the samples can help people knowing Minim (ie. not me) to understand the problem.
Perhaps there is a built-in limitation in Minim (32 is a suspiciously round (in computing terms) number), but perhaps showing how you load and play the samples can help people knowing Minim (ie. not me) to understand the problem.