I Can See Your Voice Season 4, I Can See Your Voice Season 4

I Can See Your Voice Season 4 VietSub, also known as ICSYV, is an international music game show based on the Korean version of the same name. The show introduces a group of "mystery singers" and the task of the guest artists in each round is to eliminate the bad singers without hearing their real voices, with the help of advisors and clues provided by the show. The guest artists will eliminate one or two mystery singers at the end of each round, and the eliminated singers will then perform their real voices on stage. At the end of the show, the chosen mystery singer will be revealed whether they have a good or bad singing voice through a duet with one of the guest artists. The guest artist wins if they keep a good singer until the end of the show, and the remaining mystery singer will receive the show's prize.

In other versions, a player (not a celebrity) will participate in the show. The player receives a cash prize for correctly eliminating each bad singer. In the final round, the player can choose to take the prize money if they think the last mystery singer will have a bad singing voice, or continue the show for a chance to win a special prize.

The original version of the show has 3 rounds with different rules in each season. The first round is "Singer's Visual" where the difference between good and bad singers is judged based on their appearance and outfits. The second round is "Singer's Lip-sync" where the guest artist chooses based on the lip-sync performance of the players. The third round is "Singer's Proof" where each mystery singer has different evidence presented in various ways. The guest artist must use headphones to listen to the mystery singer's voice for 30 seconds and then defend their choice to the guest artist based on the evidence and clues provided.

There have been controversies regarding the show's format. In August 2015, CJ ENM accused two Chinese shows, God of Songs and X-Singer, of plagiarizing the ICSYV format, leading to both shows being unlicensed versions in China. However, God of Songs became successful with high viewership ratings and even created a trend on social media.

In an interview with CJ ENM, the owner of the format, Diane Min, in June 2020, the company revealed that they had a dispute with Is That Really Your Voice?, another game show format from the Global Agency based in Turkey in 2013, which accused I Can See Your Voice of stealing their idea. Despite this, the show was adapted into Chinese and French versions later on.

I Can See Your Voice has been nominated for Best Non-Scripted Entertainment Program at the 44th International Emmy Awards, along with Gogglebox, Adotada, and the eventual winner Allt för Sverige.

Thanks to the popularity of the show in South Korea, I Can See Your Voice has become an international game show and is owned by CJ ENM and other television production companies. Since 2016, the international versions of ICSYV have been aired in 18 countries around the world. Giọng ải giọng ai, the Vietnamese version of the show, has a similar format to ICSYV but is designed as a "duel format" and is also recognized as part of the international version because its unique format has been used for production partners of ICSYV.