25 add support for spk type 17

[MicheleCeresoli]

Closes #25

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (84d842e) 98.32% compared to head (e8b7832) 98.39%. Report is 6 commits behind head on dev.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #27 +/- ## ========================================== + Coverage 98.32% 98.39% +0.07% ========================================== Files 22 23 +1 Lines 2030 2121 +91 ========================================== + Hits 1996 2087 +91 Misses 34 34 ```

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