Hi Martin et al,

> regarding the a134, it does a linear crossfade
> between left and right input signal, so:
>
> center pos : 50% left signal and 50% right signal
> fccw pos : 100% left signal and 0% right signal
> fcw pos : 0% left signal and 100% right signal

I concur with this, and if you want a mathematical description of
what is happening with the mix output, think of it as

(1-k)*L+k*R

where k varies from 0 to 1 as the pan control is rotated from 'left'
to 'right', so with k=0: output = (1-0)*L+0*R = L,

Similarly, for k=1: output = (1-1)*L + 1*R = 0*L + R = R

k=1/2: output = (1-1/2)*L+1/2*R=1/2*L + 1/2*R

Hope this helps ( )

Tim