Treat­ing feed­back de­lays in Late Replies

Future Music - - FEATURE -

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.

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