Doepfer A-138s Mini Stereo Mixer

Mixes audio or CV well enough - can add a small amount of gain but in general it sounds a bit softer to my ears than the direct signals do. Quite flexible for a simple module.

Pros:
- Good price, small size without feeling at all cramped.
- stereo which also means you can set up some more complicated performance routing with it if you're running a mono rig.
- mixes both CV and audio and you can use one side for each if you like or put some audio signal into the CV channel.
- has a bit of gain to spare beyond just mixing at unity
- Pots feel good and have a musical taper.

Cons:
- I feel like I can 'hear' it being in the path and I'm not usually fussy about this (I'm a pro studio engineer going back to the tape and console days and never hesitate to run things through console busses or submixes since I'm used to them being more or less invisible which I don't feel this is... I also use the two channel mixer in my Mother32 and a Malekko unity mixer those feel essentially invisible to me)

Finally a doepfer module with some clean knobs and not like the absurdly enormous previous knobs, easy to turn, easy to take them in hands and you have ample space to turn them quickly in opposition to the previous ones where you had not even the place to turn you knobs without hurting your fingers. I also use the A138m but this one really lacks space for an easy, quick and effective turning of the knob in opposition to the A138s. You really get a make noise/harvesterman-Like knobs without the color which should be the basic knobs of the whole A100 system's modules. the A138m, the A138s can mix CV signals and lets you feed them to your different CV inputs of you other modules. You can feed up to 4 different CV sources or audio sources to CV inputs, monitors, mixers or wherever you want to patch to output. You also got the panning to play with, or to use for your mastering. With this module, you get all the advantages of a doepfer module, which is cost, solidity and effectiveness without those damn knobs which are killing my fingers on a daily basis. I strongly advise you the 138s.