/diy/ - Do It Yourself

>>1559454
you start by understanding how the existing or previous solutions work, at the basic level. you might start by reading the datasheet for any of the ICs commonly used in delays (as archived by affectionate amateurs) which typically contains a block diagram of the IC. wikipedia is a surprisingly good place to get information on engineering and technical topics. you gotta know your history, mane
then you consider what it would take for a discrete implementation. since you probably don't want to match and solder 2000 MOSFETs, I think we can write off the bucket brigade device as infeasible
since you don't want to do mag tape, you'll have to find some other means of time-shifting a signal, perhaps with the help of mother google. as acoustic means go, air is one of the slowest media through which you could propagate and time-shift a signal, to allow for a reasonably sized build. it was good enough for the famous Leslie speaker, it's good enough for us
now let's put it in a container. you'll want something that won't lose much sonic energy, so a hard surface. at the same time, you might (or might not) want to limit reverberation off the walls of the container. you could use PVC pipe, with a speaker and amp at one end. you might (or might not) acoustically treat the inside of the pipe end caps with one of many sheet or coating treatments. shelf liner seems like a good choice
at the other end you would add a microphone, perhaps on a stick with a bushing of some sort for delay time adjustment, or a mechanical flanging effect if you feel so bold. feed that into your audio chain and/or speaker amp as you like