Format

Presented with a group of seven "mystery singers" identified only by their occupation, two opposing guest artists must attempt to eliminate bad singers from the group without ever hearing them sing, assisted by clues and a celebrity panel over the course of three rounds. At the end of the game, the last remaining mystery singers are revealed each as either good or bad by means of a duet between them and one of the guest artists.^[5][6]

Under the battle format, both opponents can eliminate one singer each in a single round, and then both can choose one singer each to join the final performance in the final round. At the end of the game, the conditions for winning mystery singers chosen by opposing guest artists, depending on the outcome of each final performance, if:

Every mystery singer is rewarded on following conditions:

• The guest artist gets ₫50,000,000 if a good singer was chosen; in case of a two-way tie, the main prize is halved, leaving with ₫25,000,000 each. Both winning singers, regardless of being good or bad, receive ₫10,000,000 each.
• For the fifth season, the eliminated good singer gets a consolation prize of ₫2,000,000.

Rounds

Production and development

VTV has initially made interest to produce a local adaptation of I Can See Your Voice in Vietnam in October 2015, with the show being produced by Cát Tiên Sa [vi].^[7][8] HTV would later acquire the rights in July 2016,^[9] including with production duties assigned by Điền Quân Media, Color Entertainment and Pixel Factory.^[10]

Naming and concept

The show's Vietnamese title Giọng ải giọng ai can be directly translated to "Who is the voice?"; it has an English subtitle of Hidden Voices.^[3] Being the formally recognised Vietnamese adaptation of I Can See Your Voice,^[1][2] the introduction of "battle format"^[5][6] would later implement to existing ICSYV counterparts in Indonesia,^[11][12] Thailand,^[13] and Mexico.^[14]

Filming

Filming of the show took place at the Pixel Factory Studios in Gò Vấp, Ho Chi Minh City.

According to a statement with director Khương Dừa on 5 April 2020, the series was initially planned to temporarily suspend broadcasts for an upcoming fifth season due to the COVID-19 pandemic with a possibility of discontinuation, which he later decided to reverse its plans and commence "digital auditions" anyway.^[15][16]

Special episodes

Trang Pháp [vi] defeated Hồ Việt Trung [vi] in the kids special (of a fourth season) on 4 January 2020,^[24] while Vũ Cát Tường also defeated Tóc Tiên in celebrity special (of a fifth season) on 26 July 2020.^[25]