> After changing the TL064CN in my A119 to a TL074IN and noticing
> an improved high frequency response and clearer sound I am
> thinking of doing the same to my A134 VC Panner/Crossfader.
>
> The A134 contains a TL064CN and a TL062CP - are both in the audio
> path Is it safe to swap these for a TL074 and TL072

It's no problem to replace an TL06x by TL07x or TL08x. In the first A-100
modules we wanted to keep the power consumption as low as possible and
therefore predominantly TL06x were used. In all newer designs the TL06x are
mainly used in CV paths. In the audio circuits TL07x (or others like NE5532,
LFxxx, OPxxx).

Best wishes
Dieter Doepfer