Add idea for improving scale metadata with new scaleslider primitive

[DBraun]

Add idea for improving scale metadata with a new clipslider

[sletz]

Could this be built on top of the new widget modulation model ?

[DBraun]

import("stdfaust.lib");

myfilter = fi.lowpass(1, cutoff)
with {
    FREQ_MIN = 8;
    FREQ_MAX = 20050;
    cutoff = hslider("cutoff", FREQ_MIN, FREQ_MIN, FREQ_MAX, .01) : aa.clip(FREQ_MIN, FREQ_MAX);
};

modulation = button("gate") : si.smoo : it.interpolate_linear(_, 0, 10000);

process = modulation, _ : ["cutoff":+ -> myfilter] <: _, _;

That's about as close as I can get with the existing modulation feature.

• The clipping aspect works, but I had to write the aa.clip code myself. It would be easier if this were assumed somehow.
• The GUI shows the right units, but the scale is still linear.
• The incoming modulation is an un-normalized range (0 to 10000). It should really just be between -1 and 1.

Here's another version:

import("stdfaust.lib");

// scale takes something in [0,1] and remaps to whatever you want.
// Here we have scale(0)==freqMin and scale(1)==freqMax
scale(x) = it.interpolate_linear(x, log(freqMin), log(freqMax)) : exp
with {
  freqMin = 8;
  freqMax = 20050;
};

// NO GUI
myfilter(_cutoff) = fi.lowpass(1, cutoff)
with {
    cutoff = _cutoff : aa.clip(0, 1) : scale;
};

myfilter_ui = myfilter(cutoff)
with {
    // this is not in Hertz!
    cutoff = hslider("cutoff", .05, 0, 1, .01);
};

modulation = button("gate") : si.smoo : it.interpolate_linear(_, 0, 0.7);

process = modulation, _ : ["cutoff":+ -> myfilter_ui] <: _, _;

That one's modulation works well because everything is normalized between 0 and 1. Additionally, the custom scale function works as intended. The problem is that what the GUI shows is just [0-1], not [freqMin, freqMax].

[magnetophon]

This looks great, thanks @DBraun !
What is needed to move it forward?