Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Vocal signal digital processing. Instrument for analog to digital
  conversion study   The goal of this article is to present interactive didactic software for
analog to digital conversion using PCM method. After a short introduction
regarding vocal signal processing we present some method for analog to digital
conversion. The didactic software is an applet that can be direct accessed by
any interested person.

31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph