[A6] How to check a used Andy?

[Demokid]

This is something that is valid not only for buying an A6 but for buying a 
vintage analogue sizers in general.

1. Before you go and check out the sizer try to learn as much as possible 
about the instrument. Use the internet, discussion forums. You might get tip 
what to look out for, known issues on certain models or revisions.

2. Check the physical condition. If a sizer is in good mint condition it 
usually means that the owner has taken good care of the instrument. (but not 
always)

3. Test every knob and button on the sizer, especially VCO tuning, Cut-off 
and resonance knobs since they are used a lot.

4. Check that the modulation/pitch wheels or what ever is used to modulate 
or pitch the instrument.

5. Check that all keys on the keyboard work (no dead keys or double trig). 
If the keyboard has velocity and after-touch then check that every key send 
velocity/AT.

6. Check that the sizer can be tuned using Master-tune against another 
instrument or 440Hz source. (sometimes the synth is so un-calibrated that 
the Master-tune scale is not enough) I usually bring my own portable guitar 
tuner.

7. Check that it is possible to tune the VCO's and that they scale correctly 
over the entire keyboard.

8. Check headphones, and audio inputs/outputs, expression inputs.

9. Create your own sound and store it. Select a sound then select your own 
sound (if the sizer has memories). Confirm that it is possible to store 
sounds.

10. Turn off the sizer for 5-10 minutes. Turn on the sizer and check tuning 
(e.g. auto-tune), check that your sound still is remembered.

Kind regards
Demokid