币界网报道：According to the news from Bijie.com, the Chinese short video platform Kuaishou recently upgraded its AI video generation tool Kling 2.1, adding a new synchronized sound effect generation function, which can automatically add environmental sound effects such as footsteps and rain. This function supports 1080p resolution video generation, with a single generation time of 5 to 10 seconds, and is currently free to use. In terms of price, the subscription fee for Kling 2.1 is US$9 per month, which is more than 20 times lower than the US$250 monthly fee of Google Veo 3. Tests show that Kling has outstanding performance in environmental sound effect synchronization and cost advantages, but does not support speech synthesis for the time being; Veo 3 maintains a technological lead in speech generation and complex sound effect processing. It is worth noting that Kling 2.1 has unique "silent video adding sound effects" and "lip synchronization" functions, while Veo 3 only supports text-generated videos. In terms of content review, Kling adopts a relatively loose strategy, while Veo 3 implements a strict keyword filtering mechanism.