PLAN B analog blog

Comments in line by Peter Grenader:


This module appears mystical for me.

First (my usual) complaint about the knobs: I would like the rise and 
fall controls to be more precise (less sensitive) near 
counterclockwise position. That would make it easier to set short 
times.

Also, in my unit, I have to set the rise control more clockwise than 
fall control, if equal times are desired. This asymmetry occurs even 
at full counterclockwise settings. In LFO mode I can get up to 800 Hz 
instead of 1000Hz. I wonder, if this is related.

PG:  You can change thwe distribution with the trim pot on the board.

Maximum rise and fall times are under 2 minutes. Not 5 minutes (or 20 
minutes combined, when timebase is at max) as expected.

PG: Again, adjust the trim pot on the board. - and add ad VC to the input with the attrenuator full CCW. 

- Rise and fall knobs at max => timebase knob has no effect

PG:  When the RISE/FALL is at full CCW< the cap is at it's maximum charge time.

- Timebase knob at max => rise and fall knobs have no effect

PG:  Please check this again.  WHat you're syaing here is impossible by virtue of the ciruit.  These controls are summed together along with the VC Input.  If the voltages in the summingnode dectrease, the charge time of the cap in the integratot which causes the envelope decreases and the enevelope time wil decrease.

- Timebase knob can stretch (or shrink) the envelope by a factor much 
greater than 8. (Figure of 8 is mentioned on Plan B site.)

PG:  baes on the combination fothe rise/fall, timebase and VC stimulus, yes it can.  See my note above on maximum charge time.


At /\out the envelope or LFO waveform makes a "jump" at the start and 
at the end of attack. This gets pronounced and the waveform badly 
distorted, if the level knob is set near 12 o'clock.

PG:  it operates like the Moog ADSR in that respect, yes. 
 
I haven't yet much used the vc_tb control, as I get very unexpected 
results. What voltage range is expected at the input? Is the vc_tb 
knob a bipolar attenuator?

PG: Yes it is.

The above shouldn't be taken as a (negative) review. This module is 
just confusing! - Quoting the man himself: "...but the fact that I've 
not got off my ass and composed manuals for these instruments, which 
is criminal. I really need to do that."

PG: No worries, thanks for you input?


Best regards
Jari Jokinen

Yes, the Model 10 can catch you off guard when you first use it. It
behaves unlike any other EG I have ever used (which can be a good thing).
Basically you have to throw away and preconceptions you may have and just
try and dig the way the 10 does things. After I approached it like that it
was much easier to use/integrate into my set-up.

Regards,
John Langdon

On 4/29/07 11:53 AM, "jalmari3" <jari.jokinen@luukku.com> wrote:

>  
>  
>  
> 
> Comments in line by Peter Grenader:
> 
> This module appears mystical for me.
> 
> First (my usual) complaint about the knobs: I would like the rise and
> fall controls to be more precise (less sensitive) near
> counterclockwise position. That would make it easier to set short
> times.
> 
> Also, in my unit, I have to set the rise control more clockwise than
> fall control, if equal times are desired. This asymmetry occurs even
> at full counterclockwise settings. In LFO mode I can get up to 800 Hz
> instead of 1000Hz. I wonder, if this is related.
> 
> PG:  You can change thwe distribution with the trim pot on the board.
> 
> Maximum rise and fall times are under 2 minutes. Not 5 minutes (or 20
> minutes combined, when timebase is at max) as expected.
> 
> PG: Again, adjust the trim pot on the board. - and add ad VC to the input with
> the attrenuator full CCW.
> 
> - Rise and fall knobs at max => timebase knob has no effect
> 
> PG:  When the RISE/FALL is at full CCW< the cap is at it's maximum charge
> time.
> 
> - Timebase knob at max => rise and fall knobs have no effect
> 
> PG:  Please check this again.  WHat you're syaing here is impossible by virtue
> of the ciruit.  These controls are summed together along with the VC Input.
> If the voltages in the summingnode dectrease, the charge time of the cap in
> the integratot which causes the envelope decreases and the enevelope time wil
> decrease.
> 
> - Timebase knob can stretch (or shrink) the envelope by a factor much
> greater than 8. (Figure of 8 is mentioned on Plan B site.)
> 
> PG:  baes on the combination fothe rise/fall, timebase and VC stimulus, yes it
> can.  See my note above on maximum charge time.
> 
> At /\out the envelope or LFO waveform makes a "jump" at the start and
> at the end of attack. This gets pronounced and the waveform badly
> distorted, if the level knob is set near 12 o'clock.
> 
> PG:  it operates like the Moog ADSR in that respect, yes.
>  
> I haven't yet much used the vc_tb control, as I get very unexpected
> results. What voltage range is expected at the input? Is the vc_tb
> knob a bipolar attenuator?
> 
> PG: Yes it is.
> 
> The above shouldn't be taken as a (negative) review. This module is
> just confusing! - Quoting the man himself: "...but the fact that I've
> not got off my ass and composed manuals for these instruments, which
> is criminal. I really need to do that."
> 
> PG: No worries, thanks for you input?
> 
> Best regards
> Jari Jokinen
> 
>  
>