yes, in some way.
It is a kind of envelope that you can apply.
For instance:
(setf sweep (pwl 0 800 1 2000 1))
0 and 1 means the time (in seconds) and the other twos are frequencies.
You could use this sweep with e.g. lp (lowpass) instead of giving it a
single frequency:
(lp *track* sweep)
You can refine the sweep by inserting other time/frequency pairs.
The times have to be ascending while the other values can be anything.
Cheers
Robert
On 15/05/2018, Annabelle Susan Morison <foristnights@xxxxxxxxxxx> wrote:
PWL? Is that what the sweep is?
-----Original Message-----
From: audacity4blind-bounce@xxxxxxxxxxxxx
[mailto:audacity4blind-bounce@xxxxxxxxxxxxx] On Behalf Of Robert Hänggi
Sent: Tuesday, May 15, 2018 10:01 AM
To: audacity4blind@xxxxxxxxxxxxx
Subject: [audacity4blind] Re: How would I Create...
I really can't tell.
Take step by step.
Create white noise.
make it go from right to left
then, experiment with the reson filter or eq-band.
They do both accept pwl sounds.
Cheers
Robert
On 15/05/2018, Annabelle Susan Morison <foristnights@xxxxxxxxxxx> wrote:
The frequency sweep heard at the end of this TV logo? I know it's a
sort of noise sweep, but what frequencies it is, I can't really tell,
as it starts in the middle, then goes to the high end on one spectrum
and the low end on the other, while panning from right-to-left at the
same time. It's the sound at the 6-second mark.
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