Hi guys I'm wondering if there is an audio object which can slide between two definable values

To explain I want to feed the device values between 0 and 1 (lets say) and the device will output between MAX and MIN where 0 maps to MIN and 1 maps to MAX

EG if MAX=12 and MIN=0
then feeding 0.5 will give 6

I want to use it for a morphing oscilator

I can make an abstraction or a subpatch but I would rather something more efficient

For something that basic, I don't really think you'll be gaining much efficiency by using an external. You could patch it up as an abstraction using very few objects.