The evidence of this sound analysis demonstrates just 2 weapons. 8 shots from Crooks and a single counter-sniper shot.
Many think there’s a third shooter in-between shots 8 and 10, likely a local police team member who missed Crooks.
At this point, it now looks like Crooks was the only assassin, but it’s still a mystery why shots 1-3 and 4-8 sound so different on some videos. Three shell casings were also found on the Trump side of the roof’s peak, while 5 were found on the far side, indicating Crooks changed position between both volleys of shots, or he shot the gun sideways in maybe the rapid fire volley #2, using the right angle sights seen in a screenshot of a video.