Big Walk radio stations unlock seven music channels on the portable radio. The first radio also supplies the handheld receiver, and each later music area adds another channel after its station is activated.
Start with the red station
Unlock the crosswalk before collecting channels. The first station is at 3700, 1190, on the route beyond the crosswalk after the first musical rest area. Press its red button and take the nearby handheld radio.
The light-green station is at 3820, 1620 near the Red Tower puzzle area. The yellow station is at 3310, 1850 down the mountainside from the Blue Tower, and the blue station is at 3990, 1800 on light-blue platforms northwest of the Green Tower.
Reach the outer music areas
The purple music area is at 4250, 2020 in the far south and is conveniently reached with the chairlift. The pink station is at 3310, 1280 west and downhill from the Yellow Tower.
Channel order on the receiver does not have to match the order in which the group discovers the stations. Activating the corresponding receiver is what makes each channel available on the portable radio.
Unlock the hidden seventh route
The remaining station is in a secret underground music area. Unlock the tunnels with the key earned through Yellow Tower progression, enter near 3500, 1620, and take the grey or black route that is not marked with another tower color.
The portable channels are useful beyond background music. A late sound-chair puzzle asks the group to identify a matching music area, so completing the radio route gives players a reliable reference for comparing the headphone feed.