Yeah Cv control over pitch is extremely precise and needs a proper 1v per octave voltage source to stay in tune and track properly and even then it only usually tracks well over a few octaves usually between 3 and 5 octaves before you get serious detuning.
Also sometimes audio signals of gate clocks need a good boost to the volume to work, this mostly depends on whatever is recieving the module but some audio signals from line level equipment just isn't loud enough as synth level (eurorack etc) is +9db compared to line levels.