melody, inverse and permutation

personal_username

Hi,

I'm trying to experiment with random melody creation, so I built a very very simple patch to create a melody and replay it as it was, inverted and permutated. I have two things not clear in my mind:
1) is there a way to make it simpler? i mean... it works but it looks complicated to me, no?
2) i don't know why when playing computer MIDI instr it works, but if i send those messages to an external sampler inverse and permutated play on channel 16. always.

Max Patch

Copy patch and select New From Clipboard in Max.

Any idea?
thanks

Roman Thilenius

i cant look at max5 code, but this seems a lot of code for inversion ... something
like [map 60 72 72 60] should perform a (very simple) melody inversion already.

Luke Hall

I don't have the [vs.between] abstraction/external, could you post/link to it?

personal_username

ops, here it is.

1217.vs.between.pat

pat

lvdw

hi,
you probably found your way already, but i wanted to do similar things and found a little snippet of code online and put in a js object. maybe helpful?

Max Patch

Copy patch and select New From Clipboard in Max.

patch:

code for js:
var arr = new Array();
var output = new Array();

permute = function(v, m){
for(var p = -1, j, k, f, r, l = v.length, q = 1, i = l + 1; --i; q *= i);
for(x = [new Array(l), new Array(l), new Array(l), new Array(l)], j = q, k = l + 1, i = -1;
++i < l; x[2][i] = i, x[1][i] = x[0][i] = j /= --k);
for(r = new Array(q); ++p < q;)
for(r[p] = new Array(l), i = -1; ++i < l; !--x[1][i] && (x[1][i] = x[0][i],
x[2][i] = (x[2][i] + 1) % l), r[p][i] = m ? x[3][i] : v[x[3][i]])
for(x[3][i] = x[2][i], f = 0; !f; f = !f)
for(j = i; j; x[3][--j] == x[2][i] && (x[3][i] = x[2][i] = (x[2][i] + 1) % l, f = 1));
return r;
};

function list(){
arr = permute( arrayfromargs(arguments), 0);
for(i=0;i
}

//+ Jonas Raoni Soares Silva
//@ http://jsfromhell.com/array/permute [rev. #1]
//adapted for Max/MSP use

hth,

andrea agostini

Hi.
You might want to try bach ( www.bachproject.net ), a library of objects and patches for algorithmic composition. There are several tutorials dealing with melodics transformations.

best
aa

lvdw

Hi,

I just had a look, didn't know about it. Nice work!
Since a while I'm using FTM a lot, doesn't seem to integrate nicely though, because of several reasons (data issues, ftm_object doesn't go through unharmed). But it implements lots of things I would like to have at my disposal in FTM, so I'll probably use it for these little things that you wanna do sometimes (like calculating all permutations of a series of five notes, see the above).

Thanks,