Hi Yann!
Of course it works perfectly and I learned about par, si.bus and
ro.interleave :)
Thanks... will be back soon I guess ;)
Klaus
On 27.07.21 12:17, Yann Orlarey wrote:
> Hi Klaus,
>
> Thanks for the example. If I understand correctly, I think you can
> generalize:
>
> gate_stereo(thresh,att,hold,rel,x,y) = ggm*x, ggm*y with {
> ggm = gate_gain_mono(thresh,att,hold,rel,abs(x)+abs(y));
> };
>
> by the following definition:
>
> gate_any(N,thresh,att,hold,rel) = B <: B, (B :> ggm <: B) :
> ro.interleave(N,2) : par(i,N,*)
> with {
> B = si.bus(N);
> ggm = gate_gain_mono(thresh,att,hold,rel);
> };
> process = gate_any(4);
>
> Cheers,
>
> Yann
>
>
> Le mar. 27 juil. 2021 à 10:22, Klaus Scheuermann <kla...@posteo.de
> <mailto:kla...@posteo.de>> a écrit :
>
> Thanks Yann,
>
> I am learning, but still not succeeding...
>
> This is not my end-game, but maybe a good example that I can't
> solve...
>
> How would I make an N-channel (linked) gate out of this?
>
> gate_stereo(thresh,att,hold,rel,x,y)= ggm*x,ggm*ywith{
> ggm= gate_gain_mono(thresh,att,hold,rel,abs(x)+abs(y));
> };
> gate_gain_mono(thresh,att,hold,rel,x)=
> x:extendedrawgate:an.amp_follower_ar(att,rel)with{
> extendedrawgate(x)= max(float(rawgatesig(x)),holdsig(x));
> rawgatesig(x)= inlevel(x)>ba.db2linear(thresh);
> minrate= min(att,rel);
> inlevel= an.amp_follower_ar(minrate,minrate);
> holdcounter(x)= (max(holdreset(x)* holdsamps,_)~-(1));
> holdsig(x)= holdcounter(x)>0;
> holdreset(x)= rawgatesig(x)<rawgatesig(x)';// reset hold when raw
> gate falls
> holdsamps= int(hold*ma.SR);
> };
>
> Thanks,
> Klaus
>
>
>
>
> On 26.07.21 16:27, Yann Orlarey wrote:
>> Hi Klaus,
>>
>> You can give names to the input signals as in your example, but
>> you don't have to. In other words, instead of writing:
>>
>> process(x) = f(g(x));
>>
>> you can use a more idiomatic style, and write:
>>
>> process = g : f;
>>
>> Faust is inspired by Moses Schönfinkel's combinatory logic (1924)
>> and John Backus' FP (1977). The idea of Schönfinkel was to
>> eliminate the need for variables in mathematical logic. In
>> functional programming, this style is known as "point-free" or
>> "tacit" programming.
>>
>> At first sight, it seems complicated to do without variables. But
>> a variable is just one way (among others) to move a value to its
>> point of use. In Faust, you can use the `_` and `!` primitives,
>> as well as the five operations of the block diagram algebra (or
>> the route{} primitive) to create complex routing to move signals
>> to their point of use.
>>
>> The advantage of point-free expressions is that they are more
>> modular and often easier to generalize. Let say you want to write
>> a quadriphonic amplifier. You can write:
>>
>> amp4(v,x1,x2,x3,x4) = v*x1, v*x2, v*x3, v*x4;
>>
>> but it is better to write:
>>
>> amp4(v) = *(v), *(v), *(v), *(v);
>>
>> or even better to write:
>>
>> amp4(v) = par(c,4,*(v));
>>
>> This is now easy to generalize to a variable number N of channels:
>>
>> anyamp(N,v) = par(c,N,*(v));
>>
>> (note: by convention, we use capital letters for parameters that
>> need to be known at compile-time, here N)
>>
>> You can now specialize this general definition, as in:
>>
>> amp4 = anyamp(4);
>> amp8 = anyamp(8);
>>
>> So much for the principle, on an extremely simple example. What
>> you are trying to do is probably more complicated. Don't hesitate
>> to post a little diagram if you need help...
>>
>> Cheers,
>>
>>
>> Yann
>>
>>
>> Le lun. 26 juil. 2021 à 10:23, Klaus Scheuermann
>> <kla...@posteo.de <mailto:kla...@posteo.de>> a écrit :
>>
>> Hi All,
>>
>> so for stereo, I have
>>
>> process(x1,x2)= x1,x2;
>>
>> How would I use 'par' in 'process' for N-channel operation?
>>
>> (I need the inputs x1, x2, xN later in a function.)
>>
>> Maybe a list with N entries?
>>
>> Thanks, Klaus
>>
>>
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