Am I reading this schematic correctly?

[Hiwatt25]

Another forumite was kind enough to send me the following schematic of a pedal he built and I'm not sure I'm reading it correctly.  So, before I try to breadboard it would someone be willing to tell me if I'm a total bozo?  His build only had one toggle switch and a 3PDT switch in it.

http://i104.photobucket.com/albums/m182/hiwatt25/boostscheme.jpg

What confuses me is that it looks like it's got four SPDT switches in it.  From left to right I THINK they are.

1) Connects the tip (input) to the circuit or to the output (bypass)?
2) Sends the input to the tranny or to SW3 where potentially it could be open and you'd hear no sound.
3) Connects the output of the circuit to a pot or to SW2 and maybe nothing
4) Connects/disconnects the pot.

Or, is this one switch with multiple poles laid out in a way I'm unfamiliar with.  Or am I just totally missing something? 

[Hiwatt25]

Okay, I've looked at this some more and might be getting close.  Please let me know if my thinking is right.

SW 1 (going left to right) would be like the first pole of a 3PDT switch right?  It would seem that in essence SW1 and SW4 are moving in tandem although really just the same switch.  I hope that's right.

SW2 would be the only additional switch as it would send the input (if chosen) to the tranny or the volume control.  The output at lug 2 of the pot would be connected to the second pole of the 3PDT switch right?

And then the third pole id for the LED. 

Am I close?  If so, why is it drawn that way?  It seems they could have left of two switches.

Thanks again.

[petemoore]

  Looks like a Volume Control and Boost Bypass Schema.
  An 'inside switch' [the two closest together] are each 1/2 of a DPDT, wired as true bypass, except in this case, the effect circuit [with the active] is bypassed but not the volume control.
  Hit the other switch and the volume control and the circuit are both bypassed.
  Might be cool, if the circuit bypass mode volume control attenuation happens to be the right amount of attenuation that is the right amount when you set it for Fuzz or effect sound [which probably boosts considerably]...why you would want to further attenuate a drop in volume...I don't know.
  You could eliminate one of the switches, I would just put the volume control on the output of the circuit directly, inside the 'inside' switch, eliminate the second 'outside' dpdt entirely, unless you think you'd have a use for it there, I'd find some other service for it.
 

[nordine]

for what it does, it's a boost with two switching options: one that's true bypass, and another that gives you a passive volume control... why that?.. i mean , i don't see too much use for it.. maybe getting three levels of volume (default, boost, and passive control which is preset by the volume of the boost)

[Hiwatt25]

I was confused because I thought all the switches were independent.  It didn't understand why you would want different switches that if thrown the right (or wrong) way would open up the circuit. 

Makes a lot more sense now. 

Thanks.

[MasaRGR]

It's a very situation-specific effect and I'm sure most guitarists wouldn't have a use for both parts of it 

I use it for rehearsals when I don't want to lug my big pedal board. My band practices in a lot of different studios and depending on what amps they have available, sometimes I need a booster for clean amps to switch from clean to dirty - and sometimes I need a passive volume cut to get a clean sound out of a single-channel, high gain head. Yes, I can turn down the volume on the guitar and get the same effect, but it is just easier for me to have a preset level for a clean sound. Again, it is a very job-specific pedal and if I only played through my own amps, I wouldn't have any use for it. Odd idea, and pretty useless for most guitarists, but it does save space on my small practice board, and serves its two-functions very well.

Like I suggested to Hiwatt, I would just leave out the toggle switch and build the booster section by itself 

Aloha,
Masa

[ambulancevoice]

for the switches on the in and out
which represents true bypass, use a dpdt footswitch or 3pdt footswitch (for use of LED)
the other to switch between volume control and boost
use a dpdt or 3pdt (for LED)

[aron]

Pretty neat idea. Thanks for the post!

[Hiwatt25]

For my money, I'm gonna build it the way it's drawn  .  I may never use the cut function but the way I look at it, I just learned something new and it'd be fun to experiment.  Besides maybe some day someone will look at it and say, "Hey, what's the deal with that funky pedal".