[PD] How can I weave multiple signals together?
ratulloch at gmail.com
Fri Mar 29 09:25:21 CET 2019
Wow!! That one line did it thanks so much.
On Wed, Mar 27, 2019 at 10:09 PM Charles Z Henry <czhenry at gmail.com> wrote:
> fexpr~ ($y1+1)*($y1<2);
> might have a *lot* of high frequency content.
> you could replace the counter in the above fexpr~ with a slower
> counter and it would have a coarser effect. That would reduce the
> pitch of the noise. If the counter got slow enough, it would sound
> more like abrubt panning between the signals instead of mixing the
> signals and adding noise.
> fexpr~ ($y1+$f4)-3*($y1+$f4>=3);
> That adds a $f4 inlet, set to a float less than 1 to slow down the
> counter. It will pitch the noise down into a more usable range. At
> around 0.01-0.1, you'd start to hear some tones pop out (80-800 Hz).
> Probably at around 0.0001, it would start to sound like an arpeggio.
> Replace the counter with a random walk with drift on [0,3] might also
> be good. It would smear out the high frequency noise. It would give
> you 2 parameters to control the effect, speed and noise amplitude.
> Or you could try to add some cross-fading with another parameter that
> would cut down on the clicks. I don't know what you had in mind for
> this effect
> On Wed, Mar 27, 2019 at 5:04 PM Charles Z Henry <czhenry at gmail.com> wrote:
> > there's another option you're missing which doesn't involve storage
> > When you do your interleaving in a literal way, think of it as the sum
> > of 3 signals:
> > A,0,0,B,0,0,C,0,0,...
> > 0,1,0,0,2,0,0,3,0,...
> > 0,0,!,0,0,@,0,0,#,...
> > Those signals are versions of the original, except pitched down by
> > factor of 3, with an additional bit of harmonic content, and then
> > added together.
> > If you didn't want to pitch down the signals, and you know that your
> > osc~ frequencies are low (< 4kHz should be enough)
> > you could just multiply by
> > 1,0,0,1,0,0,1,0,0
> > 0,1,0,0,1,0,0,1,0
> > 0,0,1,0,0,1,0,0,1
> > and add them up. If you DID want them pitched down by factor 3, you
> > could adjust your inputs to osc~ to freq/3
> > And you can do it with a single fexpr~
> > [ fexpr~ ($y1+1)*($y1<2); $x1*($y1==0)+$x2*($y1==1)+$x3*($y1==2) ]
> > That object takes your 3 input signals $x1, $x2, $x3, makes a counter
> > in the first output $y1 (0,1,2,0,1,2,...) and the 2nd output $y2 has
> > your interleaved signal ($x1[-1], $x2, $x3, $x1, ...)
> > I'd say, give it a try, it's a nice idea, but the high frequencies
> > you're going to introduce may be harsh and in the range of 8kHz and
> > up... and the result in the low frequency range won't be much
> > different from simply adding them up.
> > Chuck
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