Little Phatty - OS 2.2

[Jurgmeister]

I've updated my LP Stage I to OS 2.2 (from 2.0) which caused a number of different digital problems (some REALLY SERIOUS PROBLEMS!!!!)

1. There is an ugly and clearly audible zipper-noise when tweaking the Filter-cutoff knob. This thing is supposed to have Real Analog Control. LFO-modulation sounds sounds different from manual cutoff-freq-modulation. This makes this completly analog synthesizer sound really digital.

2. Updating using the MOOG Editor didn't work in any configuration. I had to send the Syx-file with MIDI-OX.

3. Tuning of oscillator 2 is flat. A calibration-procedure of OSC 2 couldn't fix this.

And the most serious problem:
4. The instrument freezes when LFO-speed is set past the 4 0'clock position (the PRESET-light flashes red/yellow). Waitint a couple of seconds returns the instrument to a working state, but playing the keyboard in the "freezing"-state causes a "Fatal error, KEYBOARD OVERRUN" and the instrument crashes completly.

Does anybody have the sys-ex file of OS2.0 for me so I can put a properly working OS in my LP? It's useless now.

[Sir Nose]

Weird, I sware I had OS 2.0 saved on my hard drive, but it seems to be gone. I perfer the midiOX update to the editor program, to each his own. 2.1 is stable and does not have the LFO issue. 2.1 is still available on the Moog site if you want to roll back to that. Maybe someone else has 2.0 laying around and could email it to you.

[_DemonDan_]

The instrument freezes when LFO-speed is set past the 4 0'clock position. Waiting a couple of
seconds returns the instrument to a working state, but playing the keyboard in the "freezing"
state causes a "Fatal error, KEYBOARD OVERRUN" and the instrument crashes completly.

Hi Jurgmeister,

As Amos explained above, the freezing you experienced was do to patches that use LFO as the Arp Clock.

The fix is to change those patches to use something other than LFO for the Arp's Clock.

I think this is most or all of the patches that do so:

4, 6, 11, 14, 18, 33, 40, 44, 46, 66, 82.

Once you fix these you should be fine with the current OS.

[Jurgmeister]

The instrument freezes when LFO-speed is set past the 4 0'clock position. Waiting a couple of
seconds returns the instrument to a working state, but playing the keyboard in the "freezing"
state causes a "Fatal error, KEYBOARD OVERRUN" and the instrument crashes completly.

Hi Jurgmeister,

As Amos explained above, the freezing you experienced was do to patches that use LFO as the Arp Clock.

The fix is to change those patches to use something other than LFO for the Arp's Clock.

I think this is most or all of the patches that do so:

4, 6, 11, 14, 18, 33, 40, 44, 46, 66, 82.

Once you fix these you should be fine with the current OS.

I'll check that this evening. Are you refferring to OS2 sounds or OS-1 sounds ? I've got the OS1 sounds in my Little phatty.

But this doesn't resolve the other problems like the OSC2 tuning-error & the zipper noise......

[_DemonDan_]

4, 6, 11, 14, 18, 33, 40, 44, 46, 66, 82.

Are you refferring to OS2 sounds or OS-1 sounds ?

Hi Jurgmeister,

Those numbers represent OS 2.2 patches.

[Amos]

But this doesn't resolve the other problems like the OSC2 tuning-error & the zipper noise......

Can you describe these problems to me in detail? You can email me at amos at moogmusic d0t c0m if it's easier. Thanks!

[EMwhite]

But this doesn't resolve the other problems like the OSC2 tuning-error & the zipper noise......

Can you describe these problems to me in detail? You can email me at amos at moogmusic d0t c0m if it's easier. Thanks!

While you are at it, Amos, could you provide updated firmware/code for my "Wheel of Fortune" Pinball machine? Stern Pinball fired a bunch of the designers and engineers and are not maintaining the code any longer.

I would like them (you!) to add a voice-call to the ExtraBall sequence and implement the much anticipated "Wizard Mode".

Thanks,

-Mike W. from NJ

[Jurgmeister]

Thanks for the help, people, it brings back some joy playing my LP !!

I did some tests with my LP this evening, and indeed, the ArpClock-Int setting was causing my LP to crash.
And the Zipper-noise could only be reproduced in precicion-mode, so that problem seems to be solved too (since this mode is meant for reference, and not for performance).

And about the tuning: maybe it needs a hardware-calibration...

[Sir Nose]

Did you perform all 4 calibrations in the order described? I read that you did perform a calibration, but all 4 in order is important.

[sine]

3. Tuning of oscillator 2 is flat. A calibration-procedure of OSC 2 couldn't fix this.

On mine, OSC 2 tuning range will not quite get to a 5th above or below the pitch of OSC 1. At either extreme it's slightly flat of a perfect 5th, relative to OSC 1. I noticed this after upgrading to OS2.2, but I can't remember if the OSC 2 tuning range was different in previous OS versions. Anyway, is this what you mean by oscillator 2 being flat?

[Giuseppe]

Did you perform all 4 calibrations in the order described? I read that you did perform a calibration, but all 4 in order is important.

What's the order to perform all 4 calibrations?

[Sir Nose]

Did you perform all 4 calibrations in the order described? I read that you did perform a calibration, but all 4 in order is important.

What's the order to perform all 4 calibrations?

Follow the detailed instructions on p.37-41 of the manual http://www.moogmusic.com/manuals/LP_S_UserManual.pdf

Pitch Wheel-> Note-> Pitch Wheel Amount-> OSC 2

[JWaltman]

3. Tuning of oscillator 2 is flat. A calibration-procedure of OSC 2 couldn't fix this.

On mine, OSC 2 tuning range will not quite get to a 5th above or below the pitch of OSC 1. At either extreme it's slightly flat of a perfect 5th, relative to OSC 1. I noticed this after upgrading to OS2.2, but I can't remember if the OSC 2 tuning range was different in previous OS versions. Anyway, is this what you mean by oscillator 2 being flat?

same for me, the range of osc 2 FREQ is just a tiny bit too small.

will do the calibrations later today, and the big one during the night..as it takes a looooong time.

[tript]

I imagine Moog has considered OSC2 FREQ ranges and why they do not need to go > P5ths.

[JWaltman]

I imagine Moog has considered OSC2 FREQ ranges and why they do not need to go > P5ths.

I''m curious about that reason, a pure fifth is far more beautiful then a woll temperiert one.