MIDIbox

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AOUT modules generate analog voltages (and gate signals) controlled by Midibox. Usually these are used to drive Analog Synthesizers.

The following modules are available:

AOUT Module ^uCApps
(Uses the expensive and somewhat hard-to-find MAX525 DACs and MAX6007 voltage reference. What appears to be a suitable drop-in replacement for MAX6007B appears in this thread: the TI LM4040A20IDBZR (datasheet).
AOUT_LC Module (low cost AOUT Module)^uCApps
AOUT_NG Module (new AOUT Module)

The SHX8 module is used to extend the number of AOUT outputs using Sample and Hold chips

SHX8 Module (expands AOUT Module < 64 CV Outputs) ^uCApps
(expired, S&H chips are discontinued/obsolete)