GssL 20th Anniversary edition

[scott2000]

You bored? Or a better bot? Keeping an eye on you..

/Jakob E.

Just an opinionated coonass...
It's an interesting observation about the comp imo.

 

[desol]

Blend is a switch you turn on? I thought wet/dry blend was always in the circuit?

Also, I was hoping there was gonna be a limit feature added....20:1 for example. Like the Smart C2.

 

[Gustav]

All files up, and everything out of our hands.

Hope someone has fun with it - we sure did!

Isak & Gustav

 

[fragletrollet]

Cool stuff! Awesome work.

What options should one go for if getting it fabbed at JLC?
1.6mm and HASL w/lead unproblematic? What benefit added from say 2mm and ENIG, thicker gold etc...

What to do with vias?

Check box for "2 designs", so panel/switch PCB will be separated from main board?

I acknowledge that this is on the fringe of the scope of this thread, but thought and recommendations are appreciated.

Oh, and where would I tap the side chain to a switch, so I can use external key input for ducking uses?

 

[JMan]

1.6mm with HASL should be fine for this design.

ENIG is an unnecessary extra cost in this case IMO. Lead is only problematic if you live somewhere that has rules about it or are already using lead-free solder, or if you plan to eat it (I mean, lead is obviously problematic in a general sense, but I think you can understand what I mean). Gold plating is useful on something like an edge connector that would need to be wear-resistant, but not needed for this board. From what I can see, the most basic default option from JLC should be just fine.

 

[Script]

All files up, and everything out of our hands.

Hope someone has fun with it - we sure did!

This is a grand gesture and huge gift to the community. Thank you for all the time spent.

 

[richiyobs]

Sorry for troubling....
just for learning purpose and fun tried to simulate the CT net of the original Gssl compared to SoundSkulptor version in 500 format, since the last one has a smart configuration with only 2 caps..... believe to save space and the number of caps.

except the autoRelease position,where the slopes are very different maybe due to the dual element REL with different values, otherwise the curves are very close/similar...

What is your opinion?

thanx for your attention

best

 

[Rob Flinn]

Sorry for troubling....
just for learning purpose and fun tried to simulate the CT net of the original Gssl compared to SoundSkulptor version in 500 format, since the last one has a smart configuration with only 2 caps..... believe to save space and the number of caps.

except the autoRelease position,where the slopes are very different maybe due to the dual element REL with different values, otherwise the curves are very close/similar...

What is your opinion?

thanx for your attention

best

On your diagrams you have one drawing where you have the 2 caps (6u8 & 0.47u) in different places.

 

[richiyobs]

are you meaning a different configuration and so different behavior?
what i get in mind is that when not in auto mode the 2 caps can be considered in series and so a value like 440nF....
in auto mode R12 & R13 are no more shorted to GND and so you can get a dual element Release....
also i did an error drawing it, i removed a connection at R6

edit: Altering R11 form 100k to over 1meg, the slopes are almost matched

 

[Rob Flinn]

are you meaning a different configuration and so different behavior?
what i get in mind is that when not in auto mode the 2 caps can be considered in series and so a value like 440nF....
in auto mode R12 & R13 are no more shorted to GND and so you can get a dual element Release....
also i did an error drawing it, i removed a connection at R6

edit: Altering R11 form 100k to over 1meg, the slopes are almost matched

I mean you have the 0.47u across the 750k resistor on the left diagram & across the 910k on the right hand diagram. The 910K is wrong it should be 91K. This is the Value on the original SSL diagram which is what all these compressors are derived from. You should consider that there are 2 time constants one stacked on top of the other. So you should get an initial quick release from the 0.47u across the 91K & then the tail end of the release is slower from the 6u8 across the 750k.

 

[richiyobs]

Thanks for explaining It ....infanct At First i changed the 910k to 91k , but It doesn't match the slope of the original configuration... So went back to 910k like in soundSkulptor schemo... Also 750k and 910k are reversed in position respect to the original design as you noted, and It Is strange... So my question Is: Is the dual release Always engaged even not in auto mode?
Just to get a better understanding of what's happening in this circuit.

Thanks for your attention