[sdiy] Roland D-10 modifications

[Andre Majorel]

On 2002-03-25 14:51 +0100, Theo wrote:

> > I don't have a D* but I have an MT32 (which is I believe the
> > expander version of the D10 or D20) and in this model, the hiss
> > never stops. To me it sounds like digital noise centred around 10
> > kHz leaking into the analogue circuit.
>
> I don't have a D10 for reference but my D50 and MT32 both have
> some sort of a noise gate.  Atleast that is how I interpreted
> the increase of noise level when you play a note.  Though it
> might be no gate at all but a simple matter that no extra noise
> is generated when the system is at rest.  The 10khz noise is
> present in my units too, the source seems to be the (reverb) FX
> units.

Okay, just checked. Tried changing the reverb mode between 0 and
10, setting the individual timbre volumes to 0, and setting the
master volume to 0. None of this had any perceptible effect on the
hiss. Basically the hiss starts three seconds after the unit is
powered up and stops only when it is powered down.

I don't know if it's normal or not for an MT32 to do that ; mine
always has, ever since I've had it (circa 1991).

-- 
André Majorel <amajorel at teaser.fr>
http://www.teaser.fr/~amajorel/