Re: [Faudiostream-users] How to use par() to Duplicate DSP AND Sliders
On 10/23/20, Albert Graef wrote: > It's in the manual: > https://faust.grame.fr/doc/manual/index.html#definitions-with-pattern-matching. > These are expanded at compile time. Basically, Faust uses term rewriting as > its macro engine. The macros are "hygienic", too ( > https://en.wikipedia.org/wiki/Hygienic_macro). > > Albert I should have been clearer - it was the string interpolation in labels I was surprised by. (Pattern matching *is* amazing, but I already knew about that part.) ___ Faudiostream-users mailing list Faudiostream-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/faudiostream-users
Re: [Faudiostream-users] How to use par() to Duplicate DSP AND Sliders
It's in the manual:
https://faust.grame.fr/doc/manual/index.html#definitions-with-pattern-matching.
These are expanded at compile time. Basically, Faust uses term rewriting as
its macro engine. The macros are "hygienic", too (
https://en.wikipedia.org/wiki/Hygienic_macro).
Albert
On Fri, Oct 23, 2020 at 6:22 PM James Mckernon wrote:
> On 10/23/20, Julius Smith wrote:
> > feedback(i) = hslider("feedback %03i",0,0,0.9,0.01);
>
> Not the one who asked, but I had no idea this worked! Amazing.
>
>
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>
--
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Computer Music Research Group, JGU Mainz, Germany
Email: aggr...@gmail.com, web: https://agraef.github.io/
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Re: [Faudiostream-users] How to use par() to Duplicate DSP AND Sliders
That's how the sort comes out when there are no leading spaces in front of
the number creating a fixed field size.
In Faust, I think there is no difference between %03i and %3i. As James
guessed, I was thinking of C's printf format string.
- Julius
On Fri, Oct 23, 2020 at 9:38 AM Brandon Hale
wrote:
> Thanks James. That makes a lot more sense. I saw that in the manual, but
> it didn't register for me until you put it more simply. If you replace the
> "%03i" with just "%i", it goes from the sliders being laid out from 0-127,
> to being laid out like:
> Slider 0
> Slider 1
> Slider 10
> Slider 100
> Slider 101
> Slider 102
>
> Basically numbered left to right, almost like binary. Why is that?
> On 10/23/20 12:31 PM, James Mckernon wrote:
>
> On 10/23/20, Brandon Hale
> wrote:
>
> Thanks Julius! Using i like that makes a lot of sense. I had no idea you
> could substitute it like that.
>
> What does the %03i mean and how does that work?
>
> Brandon Hale
>
> Having just looked this up myself, I can perhaps answer for Julius.
> From https://faust.grame.fr/doc/manual/index.html#variable-parts-of-a-label
> :
>
>
> Labels can contain variable parts. These are indicated with the sign %
> followed by the name of a variable. During compilation each label is
> processed in order to replace the variable parts by the value of the
> variable. For example:
> process = par(i,8,hslider("Voice %i", 0.9, 0, 1, 0.01));
> creates 8 sliders in parallel with different names while
> par(i,8,hslider("Voice", 0.9, 0, 1, 0.01)) would have created only one slider
> and duplicated its output 8 times.
> The variable part can have an optional format digit. For example "Voice %2i"
> would indicate to use two digit when inserting the value of i in the string.'
>
> So %03i means insert the variable i's value into the string here,
> padding it (I guess with zeroes) to be three digits wide.
>
>
--
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Re: [Faudiostream-users] How to use par() to Duplicate DSP AND Sliders
Thanks James. That makes a lot more sense. I saw that in the manual, but
it didn't register for me until you put it more simply. If you replace
the "%03i" with just "%i", it goes from the sliders being laid out from
0-127, to being laid out like:
Slider 0
Slider 1
Slider 10
Slider 100
Slider 101
Slider 102
Basically numbered left to right, almost like binary. Why is that?
On 10/23/20 12:31 PM, James Mckernon wrote:
On 10/23/20, Brandon Hale wrote:
Thanks Julius! Using i like that makes a lot of sense. I had no idea you
could substitute it like that.
What does the %03i mean and how does that work?
Brandon Hale
Having just looked this up myself, I can perhaps answer for Julius.
From https://faust.grame.fr/doc/manual/index.html#variable-parts-of-a-label
:
Labels can contain variable parts. These are indicated with the sign % followed
by the name of a variable. During compilation each label is processed in order
to replace the variable parts by the value of the variable. For example:
process = par(i,8,hslider("Voice %i", 0.9, 0, 1, 0.01));
creates 8 sliders in parallel with different names while
par(i,8,hslider("Voice", 0.9, 0, 1, 0.01)) would have created only one slider
and duplicated its output 8 times.
The variable part can have an optional format digit. For example "Voice %2i"
would indicate to use two digit when inserting the value of i in the string.'
So %03i means insert the variable i's value into the string here,
padding it (I guess with zeroes) to be three digits wide.
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Re: [Faudiostream-users] How to use par() to Duplicate DSP AND Sliders
On 10/23/20, Brandon Hale wrote:
> Thanks Julius! Using i like that makes a lot of sense. I had no idea you
> could substitute it like that.
>
> What does the %03i mean and how does that work?
>
> Brandon Hale
Having just looked this up myself, I can perhaps answer for Julius.
>From https://faust.grame.fr/doc/manual/index.html#variable-parts-of-a-label
:
> Labels can contain variable parts. These are indicated with the sign %
> followed by the name of a variable. During compilation each label is
> processed in order to replace the variable parts by the value of the
> variable. For example:
> process = par(i,8,hslider("Voice %i", 0.9, 0, 1, 0.01));
> creates 8 sliders in parallel with different names while
> par(i,8,hslider("Voice", 0.9, 0, 1, 0.01)) would have created only one slider
> and duplicated its output 8 times.
> The variable part can have an optional format digit. For example "Voice %2i"
> would indicate to use two digit when inserting the value of i in the string.'
So %03i means insert the variable i's value into the string here,
padding it (I guess with zeroes) to be three digits wide.
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Re: [Faudiostream-users] How to use par() to Duplicate DSP AND Sliders
On 10/23/20, Julius Smith wrote:
> feedback(i) = hslider("feedback %03i",0,0,0.9,0.01);
Not the one who asked, but I had no idea this worked! Amazing.
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Re: [Faudiostream-users] How to use par() to Duplicate DSP AND Sliders
Thanks Julius! Using i like that makes a lot of sense. I had no idea you
could substitute it like that.
What does the %03i mean and how does that work?
Brandon Hale
On 10/23/20 12:00 PM, Julius Smith wrote:
Hi Brandon,
You want to use pattern-matching, something like
feedback(i) = hslider("feedback %03i",0,0,0.9,0.01);
echo(i) = +~(de.delay(262144,echoDuration*ma.SR)*feedback(i));
process = _,_ <: par(i,128,echo(i));
Cheers,
Julius
On Fri, Oct 23, 2020 at 8:42 AM Brandon Hale
mailto:bthaleproducti...@gmail.com>> wrote:
Hello all,
I just joined the Faust User mailing list, and am excited to be
here! I have a question about programming with Faust.
First off, I am writing a multichannel delay by using the par()
function:
import("stdfaust.lib");
echoDuration = hslider("echoDuration",0,0,5,0.01);
feedback = hslider("feedback",0,0,0.9,0.01);
echo = +~(de.delay(262144,echoDuration*ma.SR)*feedback);
process = _,_ <: par(i,128,echo);
I have followed Romain's 2017 Faust Day videos to get to the point
where I am now and have got the processing that I want.
faust2firefox shows exactly what I need: 2in -> 128 separate delay
lines. Now, I want to have separate slider controls for each delay
line. How would I do that neatly, without making 128 new variables
for echoDuration and feedback?
I saw in the Faust manual that % exists as a way to increment
names, but I am not 100% sure how that works. Is that the secret
to crack this code?
Thank you so much for any help you can provide,
Brandon Hale
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Re: [Faudiostream-users] How to use par() to Duplicate DSP AND Sliders
Hi Brandon,
You want to use pattern-matching, something like
feedback(i) = hslider("feedback %03i",0,0,0.9,0.01);
echo(i) = +~(de.delay(262144,echoDuration*ma.SR)*feedback(i));
process = _,_ <: par(i,128,echo(i));
Cheers,
Julius
On Fri, Oct 23, 2020 at 8:42 AM Brandon Hale
wrote:
> Hello all,
>
> I just joined the Faust User mailing list, and am excited to be here! I
> have a question about programming with Faust.
>
> First off, I am writing a multichannel delay by using the par() function:
>
> import("stdfaust.lib");
> echoDuration = hslider("echoDuration",0,0,5,0.01);
> feedback = hslider("feedback",0,0,0.9,0.01);
> echo = +~(de.delay(262144,echoDuration*ma.SR)*feedback);
> process = _,_ <: par(i,128,echo);
>
> I have followed Romain's 2017 Faust Day videos to get to the point where I
> am now and have got the processing that I want. faust2firefox shows exactly
> what I need: 2in -> 128 separate delay lines. Now, I want to have separate
> slider controls for each delay line. How would I do that neatly, without
> making 128 new variables for echoDuration and feedback?
>
> I saw in the Faust manual that % exists as a way to increment names, but I
> am not 100% sure how that works. Is that the secret to crack this code?
>
> Thank you so much for any help you can provide,
>
> Brandon Hale
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>
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[Faudiostream-users] How to use par() to Duplicate DSP AND Sliders
Hello all,
I just joined the Faust User mailing list, and am excited to be here! I
have a question about programming with Faust.
First off, I am writing a multichannel delay by using the par() function:
import("stdfaust.lib");
echoDuration = hslider("echoDuration",0,0,5,0.01);
feedback = hslider("feedback",0,0,0.9,0.01);
echo = +~(de.delay(262144,echoDuration*ma.SR)*feedback);
process = _,_ <: par(i,128,echo);
I have followed Romain's 2017 Faust Day videos to get to the point where
I am now and have got the processing that I want. faust2firefox shows
exactly what I need: 2in -> 128 separate delay lines. Now, I want to
have separate slider controls for each delay line. How would I do that
neatly, without making 128 new variables for echoDuration and feedback?
I saw in the Faust manual that % exists as a way to increment names, but
I am not 100% sure how that works. Is that the secret to crack this code?
Thank you so much for any help you can provide,
Brandon Hale
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