changing audio frequency to a constant

lets say i have an audio that has so many different frequencies, can i modify its frequency to constant and run it at 2000 hz for example?

[GandaBerunda]

By frequency do you mean sampling frequency?

[Mohamed Turkmani]

no i know how to change sampling frequency, i mean the actual frequency, is there a chance to change it or mix it with like a 2000 hz sine tone

Answer 1

[Chunru]

load handel.mat
[p, q] = rat(2000/Fs)

p = 125

q = 512

y2000 = resample(y, p, q);
whos

  Name            Size             Bytes  Class     Attributes

  Fs              1x1                  8  double              
  cmdout          1x33                66  char                
  p               1x1                  8  double              
  q               1x1                  8  double              
  y           73113x1             584904  double              
  y2000       17850x1             142800  double              

[Mohamed Turkmani]

can you explain the code please

[Chunru]

load handel.mat                 % load a sample data with Fs
[p, q] = rat(2000/Fs)           % find a rational fraction of desired Fs and orighinal Fs
% p, q are integers so that resample can be efficiently implemented
y2000 = resample(y, p, q);      % resample the data so that FsNew = p/q*Fs