Hello, I have been trying to solve this problem for a couple of days by now. I am pretty sure that this is a simple pointer arithmetics error on my part, but still, this is driving me crazy and I hope you don't mind asking me this question here.

I am writing a simple external which adds all the inlet signals. I expect to allow any number of inlets, so I am using the dsp_addv method. Here, for debugging purposes I am only using two inlets. When I access the inlets like in the example above everything works as expected.

Code:

t_int *ak_addthese_tilde_perform(t_int *w) { int i, j; t_ak_addthese_tilde *x = (t_ak_addthese_tilde *)(w[1]); int n = (int)(w[2]); t_sample * in1 = (t_sample *)(w[3]); t_sample * in2 = (t_sample *)(w[4]); t_sample * out = (t_sample *)(w[5]);

while(n--) { *out++ = *in1++ + *in2++; }

return (w + 6); }

When I access all input signals with an array of pointers, I cannot hear the rightmost signal in the output.  So in this code above I only hear the signal from the first inlet. Like so,

Code:

t_int *ak_addthese_tilde_perform(t_int *w) { int i, j; t_ak_addthese_tilde *x = (t_ak_addthese_tilde *)(w[1]); t_int n = (t_int)(w[2]);

t_sample ** ins = getbytes(sizeof(t_sample *) * 2); t_sample * out = (t_sample *)(w[5]);

for(i = 0; i < 2; i++) { ins[i] = (t_sample *)(w[3 + i]); }

while(n--) { *out = 0.0; for(j = 0; j < 2; j++) {

  *out += *ins[j]++;
}
out++;

}

return (w + 6); }

I would be grateful if you could point out where I am mistaken. Best

-- ahmet kizilay http://www.ahmetkizilay.com