Published on 2020-04-22 by Kenneth Flak
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One of the most fundamental ways to process audio is by delaying a signal and feeding it back in on itself. This is the basis for a lot of familiar effects: reverb, phasors, chorus, filters and so on. Let's get to know this essential effect!
To give the delay effect something to delay, we will generate an initial impulse. Create a new project in Audacity and go to Generate -> Pluck
. Let's leave the Pluck MIDI pitch
at its default setting of 60, set the Fade type
to Gradual
and Duration
to 0.100 seconds.
{{< figure src="/images/soundTech/audacityBuzzy00001.png" >}}
Select the waveform you just created and go to Effect -> Plug-in 1 to 15 -> Delay...
. In the resulting dialog let the Delay time
be 0.1333, and set Number of echoes
to 30.
{{< figure src="/images/soundTech/audacityBuzzy00003.png" >}}
Zoom out a bit to see the waveform in context, and let's get rid of some silence at the end. Make a selection from 2.000 seconds to the end of the clip. At this point you probably want to set the Start
point of the selection in the bottom of the screen, to make sure this is precise. Hit Delete
.
{{< figure src="/images/soundTech/audacityBuzzy00004.png" >}}
Let's create a bit of otherworldliness by reversing what we just created: Effect -> Reverse
{{< figure src="/images/soundTech/audacityBuzzy00005.png" >}}
Copy-paste a few times.
{{< figure src="/images/soundTech/audacityBuzzy00006.png" >}}
Select all the elements and return to Effect -> Plug-in 1 to 15 -> Delay...
. Leave everything else the same, but change the delay time to 0.1.
{{< figure src="/images/soundTech/audacityBuzzy00007.png" >}}
Glue the clips together by selecting Edit -> Clip Boundaries -> Join
.
{{< figure src="/images/soundTech/audacityBuzzy00008.png" >}}
This is all very cool, but we can make things a bit more lively still. Make sure the clip is selected and go to Edit -> Duplicate
.
{{< figure src="/images/soundTech/audacityBuzzy00009.png" >}}
Snip off the beginning of the track you have just created.
{{< figure src="/images/soundTech/audacityBuzzy00010.png" >}}
Repeat the procedure with a new track.
{{< figure src="/images/soundTech/audacityBuzzy00011.png" >}}
Set the pan of the first and second track to the left and right, respectively, before selecting the third track and heading over to Effect -> Reverb
. At this point we don't want to be subtle at all, so set Room Size
to 100 and Reverberance
to 100%, before you hit OK.
{{< figure src="/images/soundTech/audacityBuzzy00012.png" >}}
The reverb tail cuts off a little bit too soon, so fade out the last bit.
{{< figure src="/images/soundTech/audacityBuzzy00013.png" >}}