A unique DS to Wii link-up sees the portable transmit songs to hear on the TV with Band Bros DX.
Daigasso! Band Brothers DX is a music/rhythm game for DS where players can play the various parts of a song, single notes and chords. Players can download hundreds of songs onto the game via Nintendo's Wi-Fi Connection.
According to NeoGAF's Jonnyram, when the title hits Japan players will be able to download a "Speaker Channel" via the Wii store that allows compositions to be played back on your TV, and shared with others online.
Band Bros. DX hits Japan on June 26th, 2008.