+
+ int const channels = in->channels ();
+ int const frames = in->frames ();
+
+ for (int i = 0; i < channels; ++i) {
+ float* tail_p = _tail->data (i);
+ float* in_p = in->data (i);
+ float* out_p = out->data (i);
+ for (int j = 0; j < frames; ++j) {