11.3

Table Of Contents
QUARTET CHORUS ENSEMBLE503
BBD
The BBD is a bucket brigade delay line which simulates vintage ensemble effects. Historically, the bucket brigade
delay line was built up by a series of (analog) capacitors, that were clocked to consecutively transmit signals, via one
capacitor at a time, thus creating a delayed signal. The BBD algorithm in Quartet features three chorus effects in par-
allel, and therefore provides a much richer and denser effect than the Chorus algorithm.
The picture below shows the basic principle of the BBD algorithm:
Delay
Here you set the delay time between the dry and processed signals. The delay is preset scaled between the three de-
lay lines. In practice, this determines where the notches/peaks will appear in the frequency spectrum.
Range: 1.00-30.00 ms
Frequency
(log)
Input signal
Output signal
Delay Line
Amplitude
Delay
Delay Line
Delay Line
+
Delay Mod
Depth
Mod
Rate
Noise
Mod
: audio signal
: control signal