Thx for the answer and the references in the code 
If you don’t mind, I’ve a lots of question regarding your previous answer , but I will not be offended if you haven’t the time to answer them…
I need to do some homework here 
What would be the maximum number of ADC that i can configure on the daisy seed (if i sacrifice some other function) ?
What would be the maximum number of PWM that i can configure on the daisy seed (if i sacrifice some other function) ?
I usually see multiplexed pot ADC reading (like in the field and on Mutable Intstrument elements for example) but I rarely see this kind of multiplexing on CV.
Is there a reason why ?
What kind of refresh rate can I expect ? will this multiplexing result in laggy UI or it is so fast that It is transparent ?
Is there any penalty to use an external adc instead of the built in adc ?
Last question 
do you have recommendation about ADC/DAC chips ?
What are the specs I need to pay attention (except resolution, # channels and price).
SPI or I2C ? (I think SPI is faster, until 100Mhz ? Do i need that speed )
I would tend to choose 12 to 14 bit resolution and 8 channels but i guess there is other things to check.
A possible plan is to use the DAC8168 ( 16 bit 8 Channel used in mutable stages)… MAX11131 could also be a good candidate for thé adc side
Notes/references :