For the pot linked below, does it act as 2 individual pots controlled by one shaft, or does it blend between them?
http://www.banzaimusic.com/Alpha-16-FS-STE-5k-lin-SKU30795.html
quick google search: http://sound.westhost.com/pots.htm (http://sound.westhost.com/pots.htm)
Rotary -- Dual gang -- Single turn -- Stereo applications, or anywhere it is desirable to change two separate resistances at once. Nearly all dual gang pots have equal resistances and tapers, but it may be possible to rebuild a dual gang pot using intestines removed from another pot of the same make and type (not needed very often though)
is this what your asking??