Moog Sub Phatty

It looks quite basic if judged by the front panel. But most 2 buttons and 10 knobs have a second parameter in the special shift mode. You enter it by pressing Bank 4 + Active Panel buttons. You may leave this mode by pressing Active Panel again.
The 10 additional knob parameters are (original knob name in brackets):

Filter Envelope Section

• Filter Envelope Delay (Filter Envelope Attack)
• Filter Envelope Hold Time (Filter Envelope Decay)
• Velocity to Filter Envelope Amount (Filter Envelope Sustain)
• Velocity to Filter Envelope Decay/Release (Filter Envelope Release)

Amplifier Envelope Section

• Amplifier Envelope Delay (Amplifier Envelope Attack)
• Amplifier Envelope Hold Time (Amplifier Envelope Decay)
• Velocity to Amplifier Envelope Amount (Amplifier Envelope Sustain)
• Velocity to Amplifier Envelope Decay/Release (Amplifier Envelope Release)

Oscillator and Mixer Section

• Oscillator 2 Beat Frequency (Oscillator 2 Frequency = detune)
• External Input Level (Mixer Noise Volume)

And the buttons

• LFO Gate Reset (Modulation Pitch Amt OSC 2 Only) to retrigger the waveshape on a note on
• Oscillator Gate Reset (Oscillator Hard Sync Osc 2) to retrigger the waveshape on a note on

And while you are in this mode, you can also do things like setting the note priority, the envelope trigger modes per envelope, set the number of filter poles, MIDI settings (Channel, sending sysex data, ...), initialize the current preset, and note calibration. The keybed's lower notes are used to select values or to start function in this mode. Please read the manual.

You can't read the black labels for all those connections available on the left hand side in normal studio light, as it they are black on black.

• Power (obvious)
• Audio Out (another obvious one)
• External Audio In
• Pitch CV
• Filter CV
• Volume CV
• KB Gate
• MIDI In
• MIDI Out
• USB

Pro

• Moog Prodigy alike sound character is not too much distortion is used
• Compact design, but full size keys
• Many features for its size

Cons

• Not intuitive or labeled way to reach the second parameter mode
• Second parameter mode function Oberheim OB 8 alike not labeled (were they introduced after the design was fixed?)
• Unreadable socket labels under average lightning

The two first cons where fixed when the Moog Sub 37 was introduced: It got more knobs and buttons to reach all those special sound parameters and a display with menues for the MIDI and other options. And an arpeggiator and a sequencer built in. And an additional octave of keys, and ...

Conclusion

To me, the Sub Phatty is the modern equivalent in sound and size to the Moog Prodigy in the early eighties.