switching options help

[blackieNYC]

A while ago I started this switching logic thread.  Now I wish to implement the thing finally, and I could really use some suggestions.  This is a bypass/loop insert switch, with latching and momentary capabilities as well as stutter.  Momentarily or latching, it can insert the loop in place of the bypass , or it can insert the bypass in place of the loop, or make a momentary step-on stutter with the bypass signal against mute, or a momentary step-on stutter of the loop against mute.
This is 8 conditions, for which I came up with a truth table and a wiring diagram for  #3:3PDT latching stomp, #2:DPDT toggle,and  #1:DPDT momentary stomp. Please note - these are representations of the three switches, and i could do this with actual stomps and toggles, but I'm aiming for more quiet switching.  I'm thinking about rhythmic inserts - many momentary switchings, inserting the effects.  I mapped this out with 3 4053s representing each of the 4 switches. The control input would define each switches action. Maybe there's a better way? Boss Fet switching - too many parts.  the 4053 - 200ohm on resistance started needling at me when I discovered there are lots of ICs with much lower Ron - all surface mount (unfriendly SM)and or expensive.

here's that truth table simplified to "what does the momentary stomp do, in terms of the other two switches.


Check it if you like puzzles.  Forumite DocHeavy thoroughly checked it out.  It's good.
There is one condition that will result in a double loading, which I am ok with.
Again, the actual switches could be anything - mechanical, logic, relay, large array of knife edge switches, etc.

[blackieNYC]

A new question.
So in the above switches, I need a solution for only the momentary DPDT.  The momentary switch will be used while the guitar is being played so I'm looking for the most silent switching (both in and out)that I can get.  The other 2 switches are more of an in-between-songs thing.
Boss Fet switching would be the quietest.  My problem there is that the momentary DPDT has (this, or that)audio going thru it all the time.  I do not want Fets there all the time, when I am not actively using the momentary with my foot.
Relays - I have some relay boards with the PIC programmed chip, available from AMZ and the used to be at small bear.  They are great, but the audio path goes thru just the relays with no attempt at quieting the audio switching noise.
If the caps and biasing resistors from the fet switching circuit are used in a regular old switch circuit, will it help quiet the audio switch noise?

EDIT - this doesn't help.  Listening to it, with every switch tied to 1/2 Vcc and caps isolating the DC from all signal path points - it sounds the same as without.  Just a quick little crackle.

[Groovenut]

I think you might want to have a look at shunt switching rather than series. You could still use FETs but the audio would not be passing through them all the time.

[blackieNYC]

can you steer me toward an example circuit?

[Groovenut]

Something like this will work.

The Ron of Q1 in combination with R1 will determine the amount of signal reduction the switch has when it's muting. I used this Jfet as a random example. It has a Ron of about 40 ohms and yields about 42 dB of signal reduction.

[blackieNYC]

Thanks Groovenut. I ended up using fets in the boss config.  I stole the boss inverter to get On and Off logic.  because I'll be using this for momentary audio switching, the switch connects 9v, or nothing.  Should I have a capacitor there instead of nothing, tied to the switch all the time?  It seems unlikely that I'll get enough noise to turn the thing on.
Disregard that middle FET.  In the end I will have two FETs turing on and two turning off, to get a DPDT.
I used a BC182 for the logic inverter.
It works well. There is a brief turn-off sound - like you've killed the power to amp amp and the signal saturates as the rails fall.  But while this is happening, the other circuit is turning on. So when I'm momentarily inserting FX, this noise is buried by the signal coming on. No pop, no crunch, no crackle. Should do nicely. As far as my earlier attempt to avoid FETs, they didn't work as well.  So this will increase the number of FETs in my signal chain by .05%.
Oh, another thing - when I pull the power to this, both FETs pass signal. I guess that's N-channel for you.  Still, this is a keeper.
Does anyone see any area for improved reliability, or lower current draw, lower parts count, or less harm to woodland creatures?

Lower parts count = lower silicon footprint?