How To do : Cross / Vfx Control / mapping

I'd love to have this on my Vfx Control
filter 'A' is mapped to shift + Bass Gain >A
filter 'B' is mapped to shift + Bass Gain >B
Is this possible and how?
thank you - merci
http://www.youtube.com/watch?v=606ZcMKXlUg
filter 'A' is mapped to shift + Bass Gain >A
filter 'B' is mapped to shift + Bass Gain >B
Is this possible and how?
thank you - merci
http://www.youtube.com/watch?v=606ZcMKXlUg