Matt from the forum “www.ultimate –
guitar.com”,wrote to me that my scheme Big Muff is M5 1322.
“I’ve compared your schematic to my archives and yours was the V5 1322 circuit”.
https://pixhost.to/show/1127/386507706_v5-ic-big-muff-verified.jpg
That’s tone bypass switch there?
https://imagizer.imageshack.com/img924/6555/3GKQEw.png
Tone-Bypass Big Muff Pi v5 :
https://imagizer.imageshack.com/img923/360/HNtNuR.jpg