via this auction

This is what it has:
It has many features of the Arp Odyssey: Two oscillators, and features such as oscillator sync, ring modulator, sample and hold, portamento, envelope follower and more. It is almost identical programming and interface. I read somewhere that the added patch points supposedly give the modded Avatar approximately 75% of the functionality of an Arp2600, but I really can’t say for sure.
Polyphony - Monophonic
Oscillators - 2 VCOs: Sawtooth, Square, Pulse
LFO - Sine, Square
Filter - Model 4075 4-pole, 24dB Low Pass Filter
VCA - Env 1: ADSR, Env 2: AR
Keyboard - None
Memory - None
Control - CV / Gate
Date Produced - 1977 - 78
This is what it doesn’t have:
- The top of the slider for String CV. It got broken off. The slider works but it’s tricky to move. See photos. It could be hacked with a fader cap or something. The ideal would be to replace the fader and those can be found fairly easily.
- The guitar synth functionality. The work done by CMS neutralized the Avatar’s guitar synth circuits. If this feature is important to you, this is not the Avatar you want.
- It does not have MIDI. The Avatar was produced in 1977/78 and MIDI didn’t come around until 1983, so you’ll need an MIDI to CV converter or a MIDI synth that has CV/Gate outputs. I triggered it via Doepfer MAQ 16/3 or a Roland MPU-101."