PLAN B analog blog

I tried to duplicate this sound (the latter part of it, which 
utilisizes a M13):
<http://www.ear-group.net/DTG.mp3>
but got nasty random clicks at note starts. Syncing M15 at note start 
didn't help. M15 sync seems to be made for other things, but I wonder, 
if there is a trick?

At the same time I would like to comment something, I don't like in M15:
Pulse and saw waveforms are in such phase relationship, that phase 
cancellation occurs in mix. The sound is less full and somehow 
artifical IMHO.

Best regards
Jari Jokinen

--- In PLAN_B_analog_blog@yahoogroups.com, "jalmari3" <jari.jokinen@...> wrote:

> I tried to duplicate this sound (the latter part of it, which 
> utilisizes a M13):
> <http://www.ear-group.net/DTG.mp3>
> but got nasty random clicks at note starts. Syncing M15 at note start 
> didn't help. M15 sync seems to be made for other things, but I wonder, 
> if there is a trick?

I have uploaded a file of the baeic patch which will give you this sound.  Go to Photos, 
then to Miscellanous - it's the last one there.  You're probabably not setting the Model 13 
withc to the center poition - this is critical to this sound.


> At the same time I would like to comment something, I don't like in M15:
> Pulse and saw waveforms are in such phase relationship, that phase 
> cancellation occurs in mix. The sound is less full and somehow 
> artifical IMHO.

The M15 Saw and Square are phase aligned  - WHEN THE PWM IS SET TO 50% DUTY CYCLE, 
I know this to be true based on the way I generate the sawtooth waveform from di-secting 
the triangle wave through an analog switching using the reset pulse form the VCO core.

And although that core produces a square wave (the reset), I don't use it for the square out 
- I also use the triangle to create the PWM.  In that both are dirived from the same triangle 
output, they are always going to be in phase relationship when the duty cycle is set to 
50%.

> 
> Best regards
> Jari Jokinen
>

--- In PLAN_B_analog_blog@yahoogroups.com, "(i think you can figure 
that out)" <peter@...> wrote:

> I have uploaded a file of the baeic patch which will give you this 
sound.  Go to Photos, 
> then to Miscellanous - it's the last one there.  You're probabably 
not setting the Model 13 
> withc to the center poition - this is critical to this sound.

Thank you. I think my patch was similar. I have to check.

 
> > At the same time I would like to comment something, I don't like 
in M15:
> > Pulse and saw waveforms are in such phase relationship, that 
phase 
> > cancellation occurs in mix. The sound is less full and somehow 
> > artifical IMHO.
> 
> The M15 Saw and Square are phase aligned  - WHEN THE PWM IS SET TO 
50% DUTY CYCLE, 
> I know this to be true based on the way I generate the sawtooth 
waveform from di-secting 
> the triangle wave through an analog switching using the reset pulse 
form the VCO core.
> 
> And although that core produces a square wave (the reset), I don't 
use it for the square out 
> - I also use the triangle to create the PWM.  In that both are 
dirived from the same triangle 
> output, they are always going to be in phase relationship when the 
duty cycle is set to 
> 50%.

It is too difficult for me to explain in english, what I mean, but 
for those interested, here is a picture.
http://www.esnips.com/doc/c4e865f9-5d54-4ab7-a513-
9619369da4b4/saw+square
(Cwejman clip is reversed for easier comparison.) At first glance one 
might assume, that there is 25% duty cycle in the middle (M15) clip. 
It is 50%.

In this case, I prefer the fuller sound of Cwejman - except that the 
saw/pulse mix ratio can't be changed.


A random comment: Someone didn't like the small range of M15 Fine 
Freq control - I like it, as it gives much precision.


Best regards
Jari Jokinen