[sdiy] A couple more "new guy" questions...

[Andrew Dixon]

Thanks to everyone who helped me out with my last question.  You shed a lot
of light on the subjuect for me and made some helpful suggestions.

I have noticed a lot of schematics for VCOs/VCAs etc which have multiple CV
inputs.  Is the reason for these extra inputs to allow (for example)
modification of the basic sound with say an LFO, to give vibrato (with a
VCO) or tremolo (with a VCA)?

Can anyone recommend for me a cheap MIDI keyboard that I can use to control
the modules that I am planning to build? (I realise that I will need a MIDI
to CV converter.)  I would prefer something that supports as many features
as possible, such as aftertouch etc.

Thanks
Andy