Doepfer

Hello list,

Back again with this insane idea of recording voltage control signals 
to tape.
Thanks for all the suggestions you guys gave me on the last mail.

However, I am still convinced that using a frequency demodulator is the 
best option. Since using amplitude is not really an option because 
you'll lose definition in the low amplitude parts (I'm speaking about 
the conflicts with the noise floor of the recording medium that 
interferes with the actual CV).

After some searching in books and discussing with a good friend. My 
attention was pointed towards the A-196 PLL module.
I found out the following: a frequency demodulator uses the phase 
locked loop (PLL) principle....
So actually the A-196 ppl has a freq. demodulator inside its innards 
(or rather it is the phase comparator part inside the  A-196 that is 
the freq. demodulator).

However, the Phase Comparator in the A-196 is digital..
This means that it will only report three states of the difference 
between the incoming signal and the internal VCO, bummer!
As long as the external signals frequency is higher than the freq. of 
the internal VCO the resulting VC will keep rising and vice versa if 
the freq. of the external signal is lower. The resulting VC remains 
zero as long as the phases of the signals are locked (= freqs are the 
same). This is then not really providing me with a proper demodulated 
signal, it gives sort of an integrated version of what i want.

I know that the A-196 PLL is not made for what I want to do, and I 
still might buy this module anyway because i can see some cool 
applications for it.
Do any of you guys have some interesting experiences with this module??

Thanks,

Ernst



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