Hello Bernard,

> I think the hardware tuning of DCO2 is very hard to get fine. Depending of this, you will have more or less "swirling". Like a built-in phaser.
>
> This parameter is easily programmable in a patch (DCO2 detune), but for built-in patches it is not... so these sounds will feel "dull" or "lively" depending of this hardware setting.

You are right. I never thought about this.

The tuning of the DCOs depends finally on the tuning of the two master
clocks, which is set by the two coils L1 and L2. I have never touched
those, so I don't know, how hard or easy it is to get a better tuning.
But as I have now two JX-3P I might try it.

The two board layouts do not affect the sound. Roland changed only
between two pin housing types of the same chip.

Florian