Hidden Voices (game show) season 4

The fourth season of the Vietnamese television mystery music game show Hidden Voices premiered on HTV7 on 27 July 2019. Despite the linear airings ended on 2 November 2019, it was later extended by 11 additional episodes until the formal conclusion on 18 January 2020.

Format
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:

The guest artist gets if a good singer was chosen; in case of a two-way tie, the main prize is halved, leaving with  each. Both winning singers, regardless of being good or bad, receive each.

Rounds
Each episode presents the opposing guest artists with seven people whose identities and singing voices are kept concealed until they are eliminated to perform on the "stage of truth" or remain in the end to perform the final duet.