超级对撞机2D阵列:生成嵌套:包装/尺寸问题

Supercollider 2D array : generative nesting : wrap / size issues

本文关键字：包装 问题 嵌套 对撞机 2D 阵列      更新时间：2023-10-16

我正在学习超级对撞机，但在尝试创建用于存储频率的 2D 数组时遇到了问题......最初我希望数组是 12 x 9，这样行代表音符(c、d、e、f...(，列代表八度音阶，例如 f[0,0] = c0 ， f[1,5] = c#5 ， f[2,1] = d1 等。首先，SC 原生地从左到右包装行，所以这是我的第一个问题(稍后会解决(。

主要问题：我尝试嵌套 for(( 或 while(( 循环以迭代 3 个索引以手动将频率放入数组位置，但惨遭失败。我知道这充满了漏洞。斯里/谢谢。下面的代码。

//loading the frequency array with note values
(
f = Array.new(108);
for ( -57,50, { arg n; 
f.add(440 * (( 2 ** (1/12)) ** (n)) );
} );
)
/* below attempt works, sort of... values in the 
expected 12x9 array are what they're supposed to 
be, but there are extra values, in that the array 
size is larger than expected... e.g. k[0,9] should 
return null, right? Don't want the array values 
to wrap such that the first row is (108) entries 
long!
*/
k = Array2D.fromArray(12,9,f);
k[0,0]; //returns proper entry
k[0,9]; //should be null???
k[0,107]; //shouldn't exist??
k[11,8]; //returns proper entry
/* attempts at manual entry, array size is too 
large after 2nd for() loop is executed and double 
entries exist in the array, which is now bigger 
than it was initialized...
*/
h = Array2D.new(12,9);
for ( 0,8, { arg n; h.put(0,n,f[n]);} );
for ( 0,8, { arg n; h.put(1,n,f[n+12]); } );

//nested iteration attempted 1
(
f = Array.new(108);
for (-57, 50, { arg n;
f.add(440 * (( 2 ** (1/12) ) ** n) );
} );
q = Array2D.new(12,9);
for (0, 11, { arg i;
for (0, 8, { arg j;
for (0, 107, { arg k;
q.put(0,j,f[k]);
q[0,j].postln;
});
});
});
)

//nested iteration attempt 2
(
for (0, 107, { arg i;
for (0, 11, { arg j;
for (0, 8, { arg k;
q.put(j,k,f[i]);
q[j,k].postln;
//              k = k+1;
});
//          j = j+1;
});
//      i = i+1;
});
)

可以像现在一样构建数组，但是您错过了SuperCollider的一些更好的语言功能，这些功能使表达这样的概念变得非常简单。

构造数组时，collect方法可能非常有用：

var octaves = (1..7); // array of numbers 1..7
var degrees = (0..11);
var table = octaves.collect {
|oct|
degrees.collect {
|degree|
// Table value calculation here
}
}:
table[3][2]; // Octave three, degree two

超级对撞机还充分支持您手动进行的音符/频率转换 - 没有必要在这里重新发明轮子，看看Scale类，以及像|degreeToFreq| 和 |midiCps|这样的方法。

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