When crickets become evidence... Jutarnji List reports that some have questioned the recently released recording of the meeting in Brijoni of Tudjman and the army to plan operation Oluja in 1995. According to the report there is no sound of crickets when Tudjman talks about the expulsion of Serbs, unlike elsewhere on the recording. In its comprehensive reporting, it also shares some information on crickets: they only chirp when its warmer than 25 degrees (in fact you can calculate the temperature by the frequency of the chirps) and they don't chirp when they are in danger or they rest.
So if there was no chirping during during these statements, I would propose several alternative theories to that of a doctored tape: a) the crickets were exhausted and took a quick break; b) they thought they would be expelled next and as noted above, crickets in danger don't chirp or c) there was an unexpected drop in temperature (a certain chill in the air so to speak) or d) they just didn't want to be on the soundtrack to such a project...