stu,

you find my comments written inline.

Best wishes
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto: Doepfer_a100@yahoogroups.com ]Im Auftrag von Stu Grimshaw
> Gesendet: Mittwoch, 17. Dezember 2008 12:59
> An: Doepfer_a100@yahoogroups.com
> Betreff: 1 a111-5
>
>
> strange, the lack of feedback over the a111-5 synth voice.

Only within this group. Outside we have a lot of feedback and pre-orders.
Some customers suggested to name the module A-404. I have no idea why :-)

> as a mini-synth i suppose it's pretty run-of-the-mill,although at that
> price i dare say one or two other manufacturers are uttering the odd
> expletive. but as a kind of "five things you use in nearly every
> patch" toolbox, i think it's wonderful, although i'm usually no fan of
> putting as much as possible into a module.
>
> so if you'll forgive me for the one-sided feedback, here's what i like
> about it:
>
> knobs on top, connections at the bottom. i don't really like the sound
> of the cwejman stuff, but the layout i always found very good.
>
> linear and exponential filter fm. strange that this luxury should
> first appear in this context, but bring it on, say i.
>
> likewise for accurate vcf tracking. could the filter cv input be
> normalled to the cv bus

The VCF frequency control input is internally connected to the CV socket of
the VCO via the tracking switch. You can select full, half or zero tracking.
The CV socket of the VCO is normalled to the bus (can be turned off by means
of an internal jumper, same is valid for the ADSR gate).

> tune control with a choice of range. splendid!
>
> adsr/gate switch on the vca. is it connected to the gate bus

It was, but we changed it. We found that controlling the ADSR directly from
the gate leads to audio clicks especially for low frequency signals (that's
normal because you cut the wave withing the period). This is why we removed
this feature and added a range switch for the ADSR. I think that's more
useful. If you want to control the VCA directly from gate you can patch it
at the front panel.

> mini low-space lfo's. not sure how often i'd need two in one voice,
> but what else can you do with the space left over :)
>
> as soon as the midi-cv interface is available i'll be buying four of
> these. but in the meantime, i look forward to replacing five modules
> with this one.
>
> dieter, how much hassle would it be to add a pin-header to the pcb
> this could make available the separate vco and lfo waveforms etc. for
> the lightweight diy faction. or is development close to release

The corresponding pins are already available (not a pin header but single
pins, like the single outputs of the A-137-2).

> one more question. what's the difference between the triangle and
> sawtooth in its middle position

In the center position of the switch saw and tri are off. That's necessary
if you want to have only the rectangle. If the PW of the rectangle is fully
CCW or CW even the rectangle is off. This is necessary if the VCF is used as
a sine oscillator, e.g. modulated in a linear way from the VCO, in an
exponential way from the LFO and/or from the pitch CV. But even all three
modulations are available simultaneously. I hope I will find some time to
make sound examples. The simultaneous linear and exponential FM leads to
really weird sounds.

> anyway, great module dieter!
>
> stu