Copy32(hFdCngDec->bandNoiseShape,cngNoiseLevel,sub(hFdCngCom->stopFFTbin,hFdCngCom->startBand));/* This sets the new CNG levels until a SID update overwrites it Q31 - hFdCngDec->bandNoiseShape_exp*/
/* Rescale to get energy/sample: it should be 2*(1/N)*(2/N), parseval relation with 1/N,*2 for nrg computed till Nyquist only, 2/N as windowed samples correspond to half a frame*/
/* for tonal mdct concealment with tonal components above the crossover frequency, conditionally raise the frequency index until which noise is generated */
/* current channel is TCX10 and the other is TCX20 -> generate noise for "half-length" spectrum, but "increment" mid seed twice, to have the same seed in mid as the other (TCX20) channel for next frame */