It had been widely rumored that Yamaha would have some important updates to test at its private test being held yesterday and today at Brno.

The biggest expected update to be tested was a seamless gearbox, but though Yamaha Racing Managing Director Lin Jarvis had hinted they might be testing the new gearbox, it was far from certain.

As the test at Brno was a private one, no media were invited who would be able to verify whether the seamless gearbox was being tested or not.

Fortunately, however, the Brno circuit was allowing visitors in to watch the test. And among those was Pavel, who runs the Czech Valentino Rossi fansite http://www.rossi-yamaha.cz/.

Pavel shot some video footage of the private test – thankfully not covered by the blanket ban Dorna has on all coverage of the official tests – and was kind enough to send us the audio from the recordings.

Armed with that audio, we were able to analyze the sound, as we have done previously (on both the Honda and the Yamaha), to try to judge whether Yamaha was indeed testing a seamless gearbox, and if it was, what advantage it was giving the riders.