# Frequency band conversion

### Description

Perform critical band analysis (see PLP), which means the reduction of the fourier frequencies of a signal's powerspectrum to a reduced number of frequency bands in an auditory frequency scale.

### Usage

1 2 3 |

### Arguments

`pspectrum` |
Output of |

`sr` |
Sample rate of the original recording. |

`nfilts` |
Number of filters/frequency bins in the auditory frequency scale. |

`fbtype` |
Used auditory frequency scale. |

`minfreq` |
Lowest frequency. |

`maxfreq` |
Highest frequency. |

`sumpower` |
If |

`bwidth` |
Modify the width of the frequency bands. |

### Value

`aspectrum ` |
Matrix with the auditory spectrum of each time frame in its columns. |

`wts ` |
Weight matrix for the frequency band conversion. |

### Author(s)

Sebastian Krey krey@statistik.tu-dortmund.de

### References

Daniel P. W. Ellis: http://www.ee.columbia.edu/~dpwe/resources/matlab/rastamat/

### See Also

`fft2melmx`

, `fft2barkmx`

### Examples

1 2 3 |