Doepfer A-110-1

The A-110 is a voltage-controlled oscillator for eurorack modular. It can produce four waveforms simultaneously: square, sawtooth, triangle, and sine wave.Its a no frills basic oscilator but its waveforms sound great, I would describe the sound as warm and punchy and has that great analog sound that you just cant replicate with VST's .
This vco has a frequency range of about eight octaves and it seemed to track very well and stay in tune. I found that if you let it warm up for about 20 minutes the tuning will not drift .
The Doepfer A-110 also has pulse width modulation for the square wave that you can control via CV or by hand it tends to fatten up the sound and give some movement but I find its uses a fairly limited .
If your starting out on your modular journey an oscillator is a major part of sound generation in an east coast (moog style ) modular system , I would recommend this module without hesitation not for the features but for its classic sound . In fact get two and detune one slightly for that super fat sound .