One common method is to use a circuit know as a bucket brigade.
Bucket brigade delay schematic.
It only has 44k or memory in its bit bucket brigade so for the 600 ms 300 ms delay your thd is around 1 and it sounds worse than 8 bit pcm audio.
By driving the control signal for the switches the signal is transferred from one capacitor to the next each time the control or clock signal transitions.
Teer of the philips research labs.
I wanted a bucket brigade delay bbd effect in studio one.
Prior to their development most effects that time staggered an audio signal relied on magnetic tape and manipulation of tape speed.
Aluminum electrolytic capacitors in the signal path have been replaced with higher quality film capacitors for improved clarity over the original dm 2.
The circuit is based on the boss dm 2.
Connecting the capacitors are switches.
This uses the v3205 bucket brigade delay chip to provide 300ms of pure warm vintage analog delay.
These circuits consist of a chain of capacitors.
Although some analog delays e g binson echorec were based on tape others used analog bucket brigade technology.
In an analog delay the signal voltage is sampled and then moved along a capacitive storage delay line at a rate determined by a clock chip.
It consists of a series of capacitance sections c 0 to c n the stored analogue signal is moved along the line of capacitors one step at each clock cycle the name comes from analogy with the term bucket brigade used for a line of.
Only watch for and on the schematic.
So you can t really do things like u2 style.
Right now my favourite values are 50k pot just stick a 100k resistor in parallel and 330pf.
A simple feedback circuit with a bl3207 bucket brigade device and bl3102 clock generator.
What s a bucket brigade device bbd.
The pot in combination with the cap set the max time delay and as draw times are longer and the device quite noisy.
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.
Bucket brigade devices were the first wholly electronic devices for producing time delay of electronic signals.
Pour that water into another bucket and you have pretty much the same amount of water.
Bucket brigade integrated circuits like the panasonic matsushita mn3005 or reticon sad 1024 incorporated thousands of capacitive elements controlled by a clock.
It is verified on the breadboard.
The bbd is fairly old tech.
