HQSYN16

This has been suggested in #4176:

We can try experimenting with some spectral slope measures. These typically compare energy in specific spectral bands. I would try the measure which Honza Volín introduced, which calculates the ratio of a low and high frequency band energy. The low band is defined as 350-1100 Hz (so it excludes the band corresponding to F0), the high band includes the 2300-5500 Hz frequency range (excluding the F2 range, which is important to convey phonemic differences).

Thus, we need spectral slope values computed somehow. Radek S. suggested that "In Praat, you can use the command Get band energy difference... 350 1100 2300 5500."

Could you, please, have a look at such slopes computation? For spkr_AJ now (and store them to data/non-mastered/zkracene-pauzy/param/spectral-slopes/). For more details about slopes computation contact Radek or Tomáš, or see #971 where some description of spectral slopes is given.