200e

I did some tests with my Multimeter. Because i have a problem with the
tuning of my system.
the quant of the 250 does not move the notes in the correct position.

Do my 250 need some fine tuning ?

In what scan (x) v/oct does the 200e work ?

Ground

Quant. 250
0.0297 V
0.1183 V
0.2149 V
0.3117 V
0.4083 V
0.5049 V
0.6016 V
0,6986 V
0.7952 V
0.8917 V
0.9884 V
1.0852 V
1.1818 V

MIDI 225e
c 0    1.1650 V
c#0    1.2606 V
d 0    1.3559 V
...
c1    2.3101 V
.....
c2    3.4551 V
.....
c3    4.6001 V

1.2 volts/octave, or .1 volts/semitone.



> In what scan (x) v/oct does the 200e work ?




Richard Lainhart
http://www.otownmedia.com
http://www.downloadplatform.com/richard_lainhart
http://www.vimeo.com/rlainhart
http://www.airglowmusic.com






[Non-text portions of this message have been removed]

Thanks Richard for the Info.

O.k. i double checked all now and find out that.

If i play the OSC with the  internal Midi Buss they work fine. I do
not find the English word for it but in German it is called "oktave
rein" and mean that the Instrument stays in tune over more then one
Octave. One Octave is not the double freq.

If i play the OSC from pitch output E-H (225e)or by the 250 the notes
drift away. 

Anyone can help me?

Thanks

Kai




 


--- In 200e@yahoogroups.com, Richard Lainhart <rlainhart@...> wrote:

>
> 1.2 volts/octave, or .1 volts/semitone.
> 
> 
> 
> > In what scan (x) v/oct does the 200e work ?
> 
> 
> 
> 
> Richard Lainhart
> http://www.otownmedia.com
> http://www.downloadplatform.com/richard_lainhart
> http://www.vimeo.com/rlainhart
> http://www.airglowmusic.com
> 
> 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
>

--- In 200e@yahoogroups.com, "ezra buchla" <ezra.buchla@...> wrote:
>
> i don't know kai, i'm finding it to work quite well here. i'm not
> doing a formal test with reference tones but jumping several octaves
> in the 250e sounds good to my ears, provided i tune the 261e
> correctly.

All i can say is that my system do not match with all m other
instruments or my tunning equipment.
The Notes drift away. No chromatic scale.


> 
> nominally, the correct setting is maximum clockwise. but you may find
> that that gives too much modulation; this is due to the tolerance of
> the pot (of any pot in the world, i might add) and our desire to err
> on the safe side (it would be much worse if the maximum modulation
> setting gave < 1.2v/oct). the firmware knows to scale to 1.2 v/octave
> for some setting. if you're going to make chromatic music with cv
> cables (not the most obvious thing to want to do, if you ask me), the
> easiest way to tune up the osc's cv input scaling is with a midi test
> sequence from the cv outputs of the 225e.

Sorry but i have to disagree. Why you put in a quantizer in the 250 if
you do not want a chromatic scale? All my Modular system can do this
correctly.  The Old ones for the the 70s till the brand new stuff.
Please to not tell me that a 20000$ Buchla system cant play in
chromatic scale with the internal Sequencer by using the quantizer. 


> of course, using internal MIDI has the advantage if you want perfect
> accuracy over many octaves. this is because the 225e brain gets to
> tell the 261e's sinewave generator exactly what to do, without the
> buffering, sampling, and scaling that happens along the CV path.
> 

I am not talking about 100% Perfect like a digital Osc Synth. 100% in
tune over 8 Octaves. But I think there must be a way to play harmonic
music on it.

i don't know kai, i'm finding it to work quite well here. i'm not
doing a formal test with reference tones but jumping several octaves
in the 250e sounds good to my ears, provided i tune the 261e
correctly.

nominally, the correct setting is maximum clockwise. but you may find
that that gives too much modulation; this is due to the tolerance of
the pot (of any pot in the world, i might add) and our desire to err
on the safe side (it would be much worse if the maximum modulation
setting gave < 1.2v/oct). the firmware knows to scale to 1.2 v/octave
for some setting. if you're going to make chromatic music with cv
cables (not the most obvious thing to want to do, if you ask me), the
easiest way to tune up the osc's cv input scaling is with a midi test
sequence from the cv outputs of the 225e.

of course, using internal MIDI has the advantage if you want perfect
accuracy over many octaves. this is because the 225e brain gets to
tell the 261e's sinewave generator exactly what to do, without the
buffering, sampling, and scaling that happens along the CV path.

-eb

On Thu, Jul 17, 2008 at 9:02 AM, kai200e <kai200e@yahoo.com> wrote:
> Thanks Richard for the Info.
>
> O.k. i double checked all now and find out that.
>
> If i play the OSC with the internal Midi Buss they work fine. I do
> not find the English word for it but in German it is called "oktave
> rein" and mean that the Instrument stays in tune over more then one
> Octave.
 One Octave is not the double freq.
???

> If i play the OSC from pitch output E-H (225e)or by the 250 the notes
> drift away.
>
> Anyone can help me?
>
> Thanks
>
> Kai
>
> --- In 200e@yahoogroups.com, Richard Lainhart <rlainhart@...> wrote:
>>
>> 1.2 volts/octave, or .1 volts/semitone.
>>
>>
>>
>> > In what scan (x) v/oct does the 200e work ?
>>
>>
>>
>>
>> Richard Lainhart
>> http://www.otownmedia.com
>> http://www.downloadplatform.com/richard_lainhart
>> http://www.vimeo.com/rlainhart
>> http://www.airglowmusic.com
>>
>>
>>
>>
>>
>>
>> [Non-text portions of this message have been removed]
>>
>
>

hi

> I am not talking about 100% Perfect like a digital Osc Synth. 100% in
> tune over 8 Octaves. But I think there must be a way to play harmonic
> music on it.

i just said that i'm having fine results, right now, using quantized
outputsof the 250e to the 261e, playing about 3 octaves of diatonic
arpeggios.

of course it's a lot more work than using internal midi because you
have to painstakingly tune it and save the presets.

>