Track mute glitch 2XL

I depend on the track/pad mute screen a lot to bring tracks in and out of the mix quickly throughout a song. Lately I've been getting a really odd glitch where, seemingly out of nowhere, samples start getting triggered at random, at various pitches and often in reverse. Meanwhile, samples already in the mix get randomly truncated.

It's really difficult to pin down but it seems to occur when there are a lot of tracks in play (though not in all cases, and it doesn't stop when you stop the sequence). Also seems to intensify when any pad is pressed down hard, cant always reproduce that effect though. It only stops if I go to a non-mixing-related screen, the save/load screen for example.

I had this issue a while back before I replaced a bad q-link slider. I thought that did the trick but the beast is back. Little help?

Hello,

Good luck tracking this nasty one.
Do you have a 1K or a 2K5?

Maybe the hardware is faulty? Issue with the pad PCB? Bad RAM?

It's a 1000, the blue+red style. I do have the old pads if that could be a factor.

Also for the record: tested in OS1 and reinstalled both OS's, and the problem persists. Even got it to happen in Akai OS a while back. I'll take a close look at the ram next chance I get.

Try even just taking the RAM out, wiping off the contacts, and putting it back in.

A dodgy connection can cause any number of issues.

And you can keep PLAY pressed at start-up, it will launch a RAM test.

Just cleaned the ram connections, ran the memory test, everything looks fine. The problem is still there though.

one thing I noticed: it sounds like the the only samples being triggered at random are ones that have been chopped in jjos and not externally. I admit to being an unskilled jjos choppist, I've pretty much always cut camples on a PC, so I wonder if there's anything I could have screwed up in that process. Something with the start/end triggers perhaps? Should I destructively cut all my samples down to reduce cruft?

Thanks for the ideas folks, any more would be appreciated.

I had this issue a while back before I replaced a bad q-link slider. I thought that did the trick.

It really sounds like a problem with the PCB.

Indeed sounds like an issue with a board but it could be worth checking in another MPC.

If you don't know someone with a MPC, just share your project and I'll check if I have the same issue.

Personnaly I m about to finish a project and I had to reload AKAI OS, JJ OS1 and OS2XL on my mpc. I'm almost having weird bugs each time I use my MPC but not something like yours.

The two I had yesterday with OS1 : comestic bugs when switching from NEXT SEQ to MAIN, editing duration in MIDI GRID EDIT and pressing UNDO created a bug that copied another sequence instead of the one I was editing. Regarding duration edit in step edit : seems it's kept too long in the "UNDO function" so pressing this button can lead to frustration sometimes.

Honestly, the only time I saw a bug like the one you're describing was when a friend of mine got a brand new mpc2500 when it was just released. It was triggering samples randomly. He got it replaced immediately.

What you can do if you have time to lose to check the hardware is you can disconnect some boards and see what happens.

i got weird audio drop outs and glitchy fuzz type stuff, when i accidentally turned my midi on as if it were connected to my audio interface, when i wasnt connected to anything. i dont remember if the pads themselves were doing it or if it was just the sequencer when i pushed play though.
it might be worth checking if your midi is set to off instead of 1a or whatever.
that was on my 1k with jjos2xl.

damien907 wrote:i got weird audio drop outs and glitchy fuzz type stuff, when i accidentally turned my midi on as if it were connected to my audio interface, when i wasnt connected to anything. i dont remember if the pads themselves were doing it or if it was just the sequencer when i pushed play though.
it might be worth checking if your midi is set to off instead of 1a or whatever.
that was on my 1k with jjos2xl.

Good thought but alas. I'm hooked up to a midi interface normally anyway, and turning all midi off didn't fix either.

Meanwhile I've disconnected the pcbs for the pads, q-link, and upper button row, they're all eliminated as suspects. Having a hard time testing any other boards because disconnecting shuts off audio or cuts the entire machine's power.

Also noticed that the glitchy behavior changes based on the one-shot mute through/immediate option in mode+pad10. I had it on thru before and found that when set to immediate, the glitchy audio (which would normally play infinitely on) stops when I hit stop. So my thought is that the glitchy audio, however it's triggered, is being interpreted by the system as a one-shot sample. Maybe I'm just driving myself nuts

Oh and le rat, thanks, will get a couple example projects to you.

Also thought I'd ask about workarounds since I reckon I'm done pulling my hair out on this thing for a while. I know you can assign track mute 1-16 to midi notes, so I'll def be trying that, any other muting tips and tricks that might help?