Multicab SIM..my own design cabinet simulator .. it works!! cool!

[MarsSound]

slight delay on one channel....that would be well worth building!...

or while i think of it, a ''phase invert'' like on many mixing desks...2 outputs, one phase inverted...to get that dimensional ear thing going on..

btw have you downloaded DIYLC ?..for designing vero.pcb etc....great prog!

http://code.google.com/p/diy-layout-creator/

with slight delay on one channel you don't create stereo. you are more in the zone of panning. try it yourself:
copy a sound file to another track. one 100% left, the other full to the right.
put some delay on one file by shifting it a little to the right. or use a real echo with 10, 20 ,50 mS.
and more delay gives more panning to one direction.

phase invert gives a very bad stereo-picture. It isn't pleasant for the ears and mind. it works differently with headphones..
I doin't like it! it is also not a good stereo-startingpoint when you want to work with more FX after the invertion.

the pseudo-stereo story in this topic was about using all-pass filters and that will give a very nice good basic stereo-effect. thats what I want!


the layout software won't work on my old mac.....:-(

[deadastronaut]

 well i was just thinking aloud really.... ...crack on.

[MarsSound]

well i was just thinking aloud really.... ...crack on.

what you want, is not so difficult. you can do it very easy with a stereo-signal. just swap the + and - of one of the channels.

with mono it is the same thing, but maybe you need some boosting / amplifying    to get a good split-signal.

one big big problem is that you will lose all signal if the stereo will be bring back to mono by adding the channels:

[MarsSound]

well i was just thinking aloud really.... ...crack on.

phase invert is very easy done with a switch, without an electronic circuit:

[J0K3RX]

I think one of us should build this thing first and verify working then we can worry about the mods... I don't see where the stereo or phase inversion would be much of a benefit when recording direct which is what this would probably be used for most...? You can double/triple/quad guitar tracks and add slight delay, chorus etc. and do all sorts of manipulation when recording...  I guess you could go direct to mixer live with it but that is the minority I would think? Don't get me wrong, very cool ideas but I wanna here this thing work "good" first! There are not many "good" cab sims out there besides the Palmer and a select few others.. If this would come close it would be GOLD in my book!! After using impulses I am hard pressed to find a hardware solution that comes close!?

[MarsSound]

I think one of us should build this thing first and verify working then we can worry about the mods... I don't see where the stereo or phase inversion would be much of a benefit when recording direct which is what this would probably be used for most...?

the problem in this topic is that there are two different subjects without any relation: the multi-cabsim and something about making pseudo-stereo effects.
so, the phase-invert thing has nothing to do with the speaker-sim.

I am hard working on a vero-board layout!
It will be a little weird...with two parts on the board, but I can't find another solution to keep it tide.

I will post it when I have builded a good working version!

[deadastronaut]

@: jim yes i agree.  ( i just went off on a tangent as the'' pseudo stereo'' sounded just like a phase inverter to my ears )


@mars: yeah i use that for my diy sustainer switching ........anyway no problem, i'll just shut the @#$% up ok...

[The Red Rooster]

In an old National Semiconductor application note - by memory - Pseudo stereo can be crated by using the following method:

left channel = input signal - processed signal

right channel = input signal + processed signal

"middle" = original signal

Stereo image can be changed depending on how you mix these 3 signals.

This is similar to the "Tina Turner" trick used in studioes, where original mono vocal is kept in midle, and hard left is original pitched +3 cent, and hard right is pitched -3 cent. This is a great method of fattening up a vocal track or a single instrument.

BR

Kurt

[MarsSound]

ok,

my vero-board layout is ready, is tested and works 100 %!

it is a little-a-bit strange layout but I wanted it to be as little as possible. here is a pic of the filled board:

[MarsSound]

I can put my vero-board layout here in this tpoic if somebody wants it...

[pakrat]

Yes please 

[tca]

the pseudo-stereo story in this topic was about using all-pass filters and that will give a very nice good basic stereo-effect. thats what I want!

Some time ago I was looking for something like that. These are the two links that I thought to be useful:

http://www.ethanwiner.com/St-Synth.html

and a patent http://www.google.com/patents/US4239939

At the time I thought that the schem of the patent would give a good result.

Cheers.

[J0K3RX]

I can put my vero-board layout here in this tpoic if somebody wants it...

That would be nice!!!

[MarsSound]

ok, here's my vero layout.
it's by hand so maybe somebody can make a better graphic version with special software.
and if somebody finds mods to make the layout more easy.... please tell!

[alexirae]

Hi guys, here it is my veroboard version of the MultiCab Sim schematic, is not verified so if someone wants to double check this, go for it, suggestions are welcome.

I did my best here consider that's the first time I make a veroboard from schematic, however I still having some questions (for the people who knows more about electronics here):

- Are all the pots linear?, which is the best option for each potentiometer, shouldn't be Gain LOG?
- Are the pot lugs in the correct position? (I still having doubts about the reading order of a potentiometer in a schematic)

[alexirae]

And it's verified!, I only did a small change from the previous layout, just change  "Bottom 3" to "Bottom 1" and "Bottom 1 and 2" to "Bottom 2 and 3" (Reversed Pot), here it is the updated layout:

[J0K3RX]

Any sound samples?

[deadastronaut]

+1

[ricothetroll]

Hi,
I just breadboarded the circuit (without the stereo stuff), it actually sounds great ! Thanx a lot for that nice project, Daniel !
Best regards.
Eric

[mth5044]

Awesome stuff. Anybody ever find the bass version that disappeared?