Ping pong delay is a popular feature of many digital delays.
But what about analog delays? Is there a way to stack two analog delays to create a ping pong effect?
I would not be the delay specialist, if I would not have take interest in this issue.
Ping pong delay
A delay signal, alternatingly running through the left and the right channel is called ping pong delay.
Mostly, the delay times are identically, but of course, it is possible to set varying times for rhythmical emphasizes like for example dotted 8th.
Analog delay pedals
In contrast to digital delay pedal, analog delays can not be programmed to create certain effects.
That means, every single bucket brigade device repeats the adjusted delay time constantly.
But to create a ping pong delay, the identical delay time has to be created alternatingly through two outputs.
Maybe, it would become possible to produce a ping pong effect with an analog delay with a digital control, but so far, no manufacturer has started such an experiment.
Two analog delays
What about creating a ping pong effect by using two analog delays?
For this, both pedals have to send the same delay time with alternating signals. And this is where it gets complicated.
One option might be, to route both delays in a mixer that sends the signal via LFO to the according outputs.
But actually, the LFO needs a synchronization with the delay time.
By using a little mixer with aux channel, an analog ping pong delay becomes possible.
In this case, it is important to mute the repeats of both delays. Now, you connect your guitar (or the instrument you like) to the input of the mixer. Next, you link the aux send with the input of the first delay. The wet output of this first delay needs to be splitted. On the one hand, you connect it with the input of the second delay, on the other hand, you establish a connection to one input of the mixer.
The respective channel needs to be panned completely to the left.
Then, you route the output of the second delay to the input of the other channel of the mixer and pan the signal completely to the right.
The number of repeats can be adjusted via the aux control. By sending the signal from the mixer a second time to the delays, you create further repeats.
To keep the signal completely analog, you ought to use an analog mixing console. By using a digital mixer, the delay would at least become an analog/digital hybrid.
For this experiment, you could also add further effects to the two effect loops, like for example modulation or overdrive.
Have fun in experimenting!