Analog Sound From A Digital Delay The PT - 80 Digital Delay

Using basic terms, BBD chips create a analog representation of the signal by storing an electrical charge that is passed along the “bucket brigade”. The charge is passed at a rate determined by the clock and the magnitude of charge stored at any given instant is an analog value, unlike a digital delay where the amplitude is assigned to a digital value that has discrete steps. At first glance, the BBD therefore has better resolution, but there are a couple of problems. There is degradation of the charge as it passes through the bucket brigade, and more importantly, the process of passing the charge from bucket to bucket creates clocking noise in the signal.