ALEA::RANDWALK2
Arguments: nc binf bsup long pamax [generic-function]
Random walk, where <pamax> indicates the maximal step of the random walk in semi-tones,
<nc> the initial value in midicents,<long> the length of the
<nc> the initial value in midicents,<long> the length of the
[[sequence]] and <binf> and <bsup> the inferior boundary and the superior boundary also in midicents.
Warning: boudaries are considered as elastic.
