What Bucket Brigade Device (BBD) Circuit? | The Pedal Diary
Bucket Brigade Device
Is an analog circuit contained within a small chip that delays an incoming audio signal
Usually can find it in some of analog Delay, Chorus, Flanger
Why it call BBD?
reference to the technique used by firefighters to put out a fire by passing buckets of water, one by one, down a line
How its work?
Just Imagine the guitar signal is the water and
the “buckets” in a BBD come in the form of a series of capacitors inside the chip
Capacitors “carry” the signal much like the buckets carry the water
Because the capacitors are continuously filling and emptying
this slows down or “delays” the signal
The EHX Memory Man develop in 1976 is the first analog delay pedal using the BBD circuit