I am trying to recognise the alphabetical letters by saving some data of records of me and others saying each letter, then comparing a test audio not contained in the data to each letter using the intercorrelation. The correlation that has the maximum value must be the one corresponding to the letter recorded in the test. I did it using mathematica, some tests worked but others didn't. When I asked somebody, he told me to filter audio from noises. I don't know how to do it. Can somebody help me?

  • $\begingroup$ It's not trivial, but I think this answer can help a lot to understand how to take the first steps: mathematica.stackexchange.com/a/15266/32491 Good luck. =) $\endgroup$ – TeM Jun 24 '19 at 19:15
  • $\begingroup$ I have tried it and the noise got worse. Thanks anyway. 😊 $\endgroup$ – Helena Maxcici Jun 25 '19 at 6:18
  • $\begingroup$ If you used exactly that code is normal, you have to adapt it to your specific case, this is the difficult part. To hope for concrete help you should load the audio you want to manipulate. $\endgroup$ – TeM Jun 25 '19 at 6:22

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