Treating feedback delays in Late Replies
Blue Cat Audio’s delay plugin will have you tweaking two feedback loops and individual taps to add effects wherever you feel like it
Now let’s take a look at the feedback loops. We can feed the delay line back into itself just like any other delay processor, using the FB Level control. However, we can set it up so that every time it returns through the feedback loop, it gets processed. Let’s go with a pitchshifter. Every time the signal goes through the feedback loop, we’ll add two semitones. That could be an extreme effect, depending on your sound.
Let’s try out a sweep filter here instead. And how about we bitcrush the whole thing, degrading it each time it runs through the feedback loop? We also get a whole extra feedback loop to be getting on with. We could compress the signal so it flattens out and is a bit easier to hear, even as it decays. We have to watch the makeup gain with this much feedback going on here.
Let’s put a Frequency Shifter on the second reply. Again, it only affects that specific repeat of the signal. Instead of making a huge shift, we just push it by a few Hertz. We detune the first reply a little in the opposite direction. These two just give the echoes a bit of wobble, almost an analogue tone. For the final bit of tap processing, let’s filter out the first two replies with a high- then a low-pass filter.
We pan our signal a little in the second feedback loop, and then put another panner, set higher, and in the opposite direction, taking it right back over to the other side. We even get Crossfeed (X-feed) and Crosstalk (Xtalk) parameters to bring each feedback loop signal into the other feedback loop signal. There are practically no limits to the creative possibilities here!
Let’s have a look at the concepts behind multitap delay and feedback loop effects using Blue Cat Audio’s Late Replies plugin. In its initial state, Late Replies offers one delay, which it calls a ‘reply’. We can retime that reply, add more replies, and set them all to pop in at different times. The special thing about LR is that it can treat individual replies with their own chains of effects, including your own plugins.
We start with four ‘replies’, which we can retime into a sequence. Each of those replies has a corresponding insert effect slot – let’s start processing. We put a bitcrusher on the third and the fourth replies, and we load comb filters after these. We can tune the comb filter to a specific note, too, and lower the feedback so it’s not as harsh.