Bucket Brigade Delay

Teer of the philips research labs.

Bucket brigade delay.

Bucket bridge delay is a long series of sample and hold the bbd chip is really just a lot of mosfets lined up in a row. The bbd is fairly old tech. Bbd delay is available as a mono mono to stereo or stereo plugin. It consists of a series of capacitance sections c 0 to c n.

Prior to their development most effects that time staggered an audio signal relied on magnetic tape and manipulation of tape speed. A bucket brigade or bucket brigade device bbd is a discrete time analogue delay line developed in 1969 by f. The main features are. Aluminum electrolytic capacitors in the signal path have been replaced with higher quality film capacitors for improved clarity over the original dm 2.

The basic series path is arranged like any fet audio switch see how a boss. The circuit is based on the boss dm 2. Authentic simulation of a bucket brigade device bbd delay line. Bucket brigade devices were the first wholly electronic devices for producing time delay of electronic signals.

Its repeats feature a slightly overdriven tonality that sits perfectly behind dirty tones and adds depth and dimension to clean sounds. It is written in native c code for high performance and extremely low cpu consumption. This uses the v3205 bucket brigade delay chip to provide 300ms of pure warm vintage analog delay. The full bucket brigade delay is a software effect for microsoft windows vst and apple macos vst au simulating the functionality and sound of classic analog delays.

What s a bucket brigade device bbd. Examples include the various iterations of the echoplex and roland s space echo. It s the bucket brigade device or bbd chip the integrated circuit ic responsible for creating the delay effect as well as other time based effects like chorus and flange in these vintage units. The bbd delay became a classic thanks to its smooth round delay sound and a chorus vibrato mode that let it double as a modulation effect.

Fortunately by the start of the 70s an alternative was on offer in the form of the bucket brigade delay bbd circuit. Back in the mid 70s guitarists fell in love with the relatively small sized and reliable bunch of bucket brigade analog delays. Developed in 1969 by philips research laboratories the bbd shuttles a stored analogue signal through a consecutive series of capacitors kind of like a fire brigade hence the name. Bucket brigade integrated circuits like the panasonic matsushita mn3005 or reticon sad 1024 incorporated thousands of capacitive elements controlled by a clock.