Hilbert transform calculations in the frequency domain seem incorrect:

//**************************
	// Fourier Domain Processing
	//**************************
	
	push ebx;
	mov eax,0;
	
	fDomainLoop:
		// if you don't need ordered bins comment the following line and use eax instead of ebx
		mov ebx,brx[eax];	// ebx is "ordered" index in the Fourier domain
		movaps xmm0,inData[ebx];	// (Re_L,Im_L,Re_R,Im_R)
		
		//// Phase shifter

	// Check if frequency is 0
	cmp ebx, 0;
	je skipPhaseShift; // Skip phase shift if frequency is 0
	
	//Check if frequency is N/2 (Nyquist freq bin)
	cmp ebx, half_n;
	je skipPhaseShift;

	// Load phase shift angle 'a'
	//movaps xmm7, phaseShift;
	
	// calculate -tan
	
	// Calculate normalized frequency
    mov ecx, ebx;           // Copy the frequency bin index (ecx) to ebx
    cvtsi2ss xmm5, ecx;     // Convert the integer index to a floating-point value in xmm5
    shufps xmm5, xmm5, 0;   // Duplicate the value across xmm5
    movaps xmm2, F16;       // Load 16 into xmm2
    //addps xmm5, tiny;
    divps xmm2, xmm5;       // Divide 16 by the frequency index
    mulps xmm2, mpmp;       // Multiply by mpmp to get alternating signs
    movaps xmm3, xmm2;       // Store the normalized frequency in xmm3
    
	//calculate squared frequency
	mulps xmm3, xmm3;
		
	movaps xmm2,ta5; mulps xmm2,xmm3;
	addps xmm2,ta3; mulps xmm2,xmm3;
	addps xmm2,ta1; mulps xmm2,xmm0;	// xmm2 is numerator
	
	///movaps xmm1,tb2; addps xmm1,xmm0;
	mulps xmm1,xmm0; addps xmm1,tb0;	// xmm1 is denominator
	//addps xmm1,tiny;
	divps xmm2,xmm1;

	// calculate cosine(angle)
	movaps xmm4, xmm2; //xmm4 = -tan(angle)
	mulps xmm4, xmm4; //xmm4 = tan(angle)^2
	addps xmm4, F1; //xmm4 = tan(angle)^2 + 1
	//addps xmm1,tiny;
	sqrtps xmm4, xmm4; //xmm4 = sqrt(tan(angle)^2 + 1)
	movaps xmm5, F1; // copy constant to register
	//addps xmm1,tiny;
	divps xmm5, xmm4; //xmm4 = 1 / sqrt(tan(angle)^2 + 1) = cos(angle)

	// calculate sin(angle)
	movaps xmm6, xmm2; //xmm6 = -tan(angle)
	mulps xmm6, xmm4; //xmm6 = -tan(angle) * cos(angle) = -sin(angle)
	mulps xmm6, FM1; //xmm6 = sin(angle)

	// Prepare complex multipliers (cos(a) +/- i sin(a))
	movaps xmm7,xmm6; // Copy sin(a) to xmm7
	movaps xmm4, xmm5; // Copy cos(a) to xmm4
	xorps xmm7, FM1; // Negate the second and fourth elements of xmm7 (for -i sin(a))

	// Check if frequency is positive or negative
	cmp ebx, half_n;
	jge negativeFreq;

	// Positive frequency: Multiply by (cos(a) + i sin(a))
	movaps xmm1, xmm0; // Copy original complex number to xmm1
	movaps xmm3, xmm0; // Another copy for the imaginary calculation
	mulps xmm1, xmm4; // Multiply real parts by cos(a)
	mulps xmm3, xmm7; // Multiply imaginary parts by i sin(a)
	xorps xmm3, mpmp; // Negate the second and fourth elements of xmm1
	addps xmm0, xmm3; // Combine real and imaginary parts

	jmp endPhaseShift;

negativeFreq:

	// Negative frequency: Multiply by (cos(a) - i sin(a))
	movaps xmm1, xmm0;     // Copy original complex number to xmm1
    movaps xmm3, xmm0;     // Another copy for the imaginary calculation
    mulps xmm1, xmm4;     // Multiply real parts by cos(a) 
    mulps xmm3, xmm7;     // Multiply imaginary parts by -sin(a) (xmm7 already has -sin(a))
    mulps xmm3, mpmp;     // Negate to get + (imaginary * sin(a))
    addps xmm0, xmm3;      // Combine real and imaginary parts 

endPhaseShift:

skipPhaseShift:
		
		movaps outData[ebx],xmm0;	// (Re_L,Im_L,Re_R,Im_R)
	add eax,16; cmp eax,N[0]; jl fDomainLoop;
	
	pop ebx;
	
	// end Fourier domain processing