Audio cutting out in one channel, then both

S2400 Bug Reports
1

I’ve installed the DSP card and updated the firmware (Feb 21 2025; DSP Card version 3.0.35). The machine booted up after I installed the card and seemed to work as expected. Yesterday I noticed the audio (both from pads and patterns) cutting out in one channel of the headphones before cutting out completely. The pattern keeps running with no audio. After rebooting (including removing the plug between power down/power up) it worked fine for several hours.

Today I’ve had the same problem, and no amount of rebooting seems to be solving it. The audio works fine through headphones and main outs for about 10 seconds after DSP Card has initialized, then the audio drops out in one channel, then the other. I can hear a very faint sound if I cycle in and out of Sample Mode, and a “click” when the machine powers off and on.

I’m concerned that I damaged some of the pins when I removed the ribbon cable connecting the two PCBs - one side of the connector on the left came off more suddenly and the outermost 3-4 pairs of pins bent slightly outwards. I very gently realigned them before reattaching the ribbon cable after installing the card. I checked that all pins were correctly aligned in all connectors.

Is there a chance this is a bug? I’m hoping it’s not an outright hardware failure because of my mistake. Let me know if there are troubleshooting steps and/or if I should open a support ticket.

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Update: I rebooted the machine with the SD card removed. I made a one bar pattern with the internal sounds and left it running for a few minutes - the audio worked fine. I put the SD card in, made a new project, loaded a kick drum, and made a one bar loop; it ran for less than a minute before the audio cut out as before. I rebooted without the SD card and ran a pattern from internal flash and it’s been running without issue for about 5 minutes.

I’m guessing there’s an issue with the SD card. I remember seeing another post in the past week about an SD card issue; I haven’t been able to find it again but I’ll have another look. If anyone reading this knows the post I’m talking about and can link it here, I’d be very grateful :folded_hands:

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