Pac-Man Championship Ed. and Blaster Master Area 4 & Game Over Ribbit Triangle Effect

Pac-Man Championship Edition Famicom Version's Normal Mode music and Blaster Master's Area 4 and Game Over themes all use this interesting effect in the Famicom/NES's 2A03's triangle channel.
In Blaster Master, it sounds like a ribbit; calling to mind the main goal of this game: to rescue the protagonist's pet frog Fred.
In Pac-Man Championship Edition Famicom Version, it sounds like the overdriven synthesizers that one typically hears in acid music.

These are both created using the same feature: the triangle's linear counter. By setting the linear counter to a low value between 1 and 3, it causes the triangle to pulse (mute and unmute itself) very quickly instead of sustaining a single note. Though it is not possible at the moment to create this effect in FamiStudio, it is possible in Furnace Tracker using effect 19xx. Here is a sample Furnace project file that shows this triangle effect.