private void is_lines_2(int tab2, int pos, int idx0, int width,int step,int gr) {
		float xr0;
		for (int w = width; w > 0; w--) {
			xr0 = xrch0[gr][idx0];
			if (pos == 0)
				xrch1[gr][idx0] = xr0;
			else {
				if ((pos & 1) == 0)
					xrch1[gr][idx0] = xr0 * lsf_is_coef[tab2][(pos - 1) >> 1];
				else {
					xrch0[gr][idx0] = xr0 * lsf_is_coef[tab2][(pos - 1) >> 1];
					xrch1[gr][idx0] = xr0;
				}
			}
			idx0 += step;
		}
	}