Thanks for your replies, Dieter. I have a few followup questions
below.

--- In Doepfer_a100@yahoogroups.com , <yahoo@...> wrote:
<snip>

> > 2) The LFO function seems to alter the amplitude of vibrato my mod
> > wheel has on the note, and NOT the frequency as specified in the
manual.

> That's normal. The A-190 manual says on page 18:
>
> "CONTROLLER #01 (Modulation)
> This controller affects modulation intensity - ie. the amount of
LFO voltage
> included in CV1."

I wasn't changing CC01. The value I was changing was the LFO freq on
the A-190 unit. From P14 of the A-190 pdf at
http://www.doepfer.de/a100_man/A190_man.pdf:

"LFO FREQ.
The LFO Freq. parameter controls the frequency of the A-190's built-
in LFO. Use your ears to decide the correct frequency. With a
parameter value of less than 3, the LFO is switched off.
Set the LFO frequency (from about 0.2 Hz to 20 Hz) H The INC- / DEC-
buttons will speed up if you keep them pressed down."

This doesn't seem to be true. It only alters the modulation intensity
as you state above, which means it's not really acting as a definable
LFO. I'll check again tonight to ensure I'm not being dumber than
usual.

> I could not find a note in the A-90 user's manual that the
modulation controller changes the frequency of the LFO.

I was trying to change the freq using the LFO FREQ parameter, not via
CC 01.

> 3) The clock-out seems to do nothing despite receiving clock signals
> > from my sequencer (AFAIK).
>
> Yes, that's the function of the clock out

I'm confused. Its function is do nothing when it receives a clock
tick from my sequencer The LED doesn't light What do people
actually do with this output, then Is it only for the clock
divider/sequencer module

> . Is this normal Have I misunderstood something
> > The only time I've had it light is when I patch a gate signal from
> > another module (say, the A-143-2) IN to it!
>
> The Gate socket of the A-190 is an OUTPUT !

I know it's supposed to be an output, but the only time I got the LED
to ligth was when I accidentally patched a gate signal IN.

> > 4) There seems to be no way of enabling portamento without
sending midi signals to the unit first
>
> The portamento function becomes active not before a change in the
CV1
> voltage appears. And a CV1 change can be caused only by two
different Midi
> notes. So without a Midi signal sent to the A-190 the portamento
function
> cannot be checked !

Sorry - I should have been more specific. The only way I can get the
portamento to start working is to first send a CC #65 (64-127), and
then send CC #05 (to some value).

I presume this is normal.