beautiful.  that did  the trick. I figured it would require some kind of jumper,  just didn't know where  without you guys.

I guess I assumed they were related since my speaker  went out immediately following removal of that pcb,  but my rca  pro sound still works. I must have inadvertently did something else in there.  I'll check again.

hooked up  the ltc  without any other mods,  straight  with no switch  and still had problems.  just realized I unwittingly  had a  linear pot instead of an audio taper.  New pots are  on the way,  hoping that fixes the problem.  anyone have  these issues with linear pots on the  variable clock  mod?

does  anyone  know of a  way to remove the whole  or  part  of the pcb  and still retain speaker functionality? I don't mind losing  the jack,  but I do want to keep the speaker.

If you make any progress with switchable crystals, please let me know! I think that's the crux of my problem- the ltc may only work in cases where it's oscillating a crystal clock, and the easy_clk Seems to be a silicon clock. I suspect that's the issue for me.

by membrane  do you mean something like the softpots  that you can get from sparkfun?  I've been eyeing them for a while,  they look like they could be really cool,  but I've heard they can be a little finicky about input,  such as finger vs  stylus.

I think it would be awesome to mount one on a dmg,  just below the screen.  it would be super convenient to use your thumb there.  it might be problematic though,  that they don't stay put like a conventional pot.   that is  to say,  you can't dial in a value and leave it.  you would have to keep your finger on it  or it would return to the extreme.

to my understanding,  using two crystals and a switch means  you need to turn the system off in order to change clock speed. kitschbent sells an ic  that takes the place of both crystals.  it's on a tiny pcb,  and it allows switching while the system is on. if  you're just using crystals that might be why the system is freezing when you switch. I  ordered crystals intending to do the same thing you're attempting,  then learned about the problem before they ever even arrived.

This may sound totally nuts, but sometimes, depending on the scratch, a little bit of toothpaste worked into it can help hide a scratch on clear plastic or glass. I've had it help about half of the times I've tried. Also, the littlest bit of wd40 dabbed on with a shop rag has been helpful on occasion , especially with scuffed up looking areas of micro scratching. I always at least give them a shot before I use anything abrasive.

I definitely checked out that same instructable, as well as the instruction image on kitsch-bent. They're super clear and look so easy. The tricky part that I can't seem to find specifics about is if the ltc plays nice with an on/on/on switch. I removed the stock crystal, per the instructions for the easy-clock. The switch is double poled, so I have the easy clock at 1/1 in two positions, 1/2 in the third position, and the ltc wired in to one of the positions that also gives 1/1. I have ltc clock coming out of the switch and going to the same point on the pcb as the easy-clock, the spot that the instructable points out.

What kind of switch are you using? Are you trying both mods on the same gameboy? Did you remove the stock crystal? It seems like there's something to learn from the fact that we're having such similar but opposite problems, if that makes sense.

I  should add  that the main objective in this project is for the modes to all be hot switchable.  that said, it  won't even boot  from cold in variable. also, switching to 1/2 works in  games every time,  but almost always causes lsdj  to give  the "don't panic" screen.  could it just be a bad ltc  for the variable problem?  anyone  with insight?

so.  this is not only my first post here on chipmusic.org, after lurking for several months, it  also marks the first time I've ever registered or posted on any forum ever.   thought I  should get that out of the way.  you guys seem seem like  some legit cool cats.

I   emailed kitsch about this project a while back, before I had all of the parts, but now I'm in the home stretch  and  facing  some trouble. I  am trying to install a dp3t  make before break  toggle  connected to  an easy_clock (1/1,1/2 time)  and variable  clock.  so far I  can get it to run  correctly in  both fixed  positions,  but when I switch to 1/1 variable it freezes.  when in variable,   using  the pot  causes varied side to side jitter,  and  changes the pitch of the last note played,  but  games and lsdj freeze  and won't resume even when switched out of variable.   

also I  hope to not be so long winded here in the future,  my apologies.