latigid on

I think what I would expect is the Selection (Sel) row to always indicate the function indicated on the 8x selection buttons (SB). So if I am in Track, the Sel row should choose tracks 1-16/GxTy. Switching (click and release) to the mute mode will show the mutes. From Track, click and hold on Mute should allow temporary switching to mutes, then when released back to Track. For me, it seems somehow to get "stuck" so the mute SB stays on and the OLEDs stay stuck in mute. I wonder if there is a conflict with option #9 or similar?

Hi Bruno, My understanding of the selection buttons (around the datawheel) is: click and release: change the selection row to that function click and hold: temporarily switch to this function, when released it will revert back to the previous selection. Does it work that way on your side? Best, Andy

Post some pics of the PCB to let another set of eyes go over it for something obvious? There's not a lot to the USB but I would check/scope the line between the 22Rs and PA11-R30/PA12-R31. Do the header pins contact the MCU chip pins? The bootloader is the normal MIOS one. When you "reflashed" was it with boot hold or over JTAG? It would be worth trying a) to upload any MIOS software e.g. _NG to see if that sticks or b) to wipe the chip and start again from bare metal. Is an SD card inserted during any of this? Does the 3v3 rail remain stable during startup? Do you see any LED or OLED activity?

Check the 22R resistors R30/31, TVS diode. Check the USB pins PA11 PA12 make it to those resistors and the MCU chip (2x2x25 pinheader soldering). Check for shorts to 0V. Check PA10 (USB ID) is floating and no jumper is in J20. Check the USB socket. You might also try reflashing the bootloader with hold mode (JPA0, needs at least R102 mounted) or even via JTAG if it got corrupted somehow.

Hehe, Peter does indeed have a soothing voice :) Maybe check that your Waveshare 407v is set to Boot Config: Flash? Best, Andy

Would have to leave Peter to answer specifics about the LoopA firmware but I will see what I can answer. I think I suggested that one too :) Might be tricky as the LoopA would have to track when things were last armed. But if there is a sensible way to do it and it's possible to code it I'm for it! It's a real-time MIDI recorder/looper so a different interface than a step sequencer. You still have to enter the notes by playing them but you can quantise after. No "song mode" at the moment as far as I know. But maybe it will be added at some point. No MIDI export at the moment but it's on the list. I don't know the naming structure. On the list! What is your specific workflow? If you want to edit individual steps then a knob-per step is best, hence the SEQ. If you want to "noodle" a jam and tidy it after, then LoopA. No, the UI requires both 40x2 OLED displays and a knob/"GP button" per step. Thanks! All was based on Peter's initial concept with some minor additions. Best, Andy

We're making good progress! It's a fancy new app with a fancy new display and fancy new other things. :)

Hi Steve, Please refer to the BOM e.g. https://www.midiphy.com/en/shop-details/137/47/midibox-seq-v4-lh-full-essential-kit- This is the whole "kit BOM" but each PCB also has its own BOM page for easier reading, plus you won't get confused with the coded "shop names" of the PCBs. There you can cross-reference all parts with the silkscreen names on the PCBs. You could in effect use the slightly longer pins for everything. I think the "standard" pins are only used for jumper headers etc. Where it's important is interconnecting the lemec and plate PCBs with through-PCB headers/sockets. A "standard" header length works but might not give quite the right contact, therefore slightly longer ensures a better connection. Have fun building! Best, Andy

Hi Robert, great! I was thinking of suggesting that you trying another card, but you said you tried two and formatted already so I didn't want to patronise you. I can only think that certain card models don't work properly and we also notice that in the SEQ. I don't think there is an upper limit and I typically use 2 GiB SanDisk ones myself. You could try the 8GiB one in the LoopA for a true test of intercompatibility :) Have fun! Best, Andy

Hi Robert, I've seen it happen that the SD slot can be soldered with too much heat and this can kill things. How was your soldering of it? Check for continuity back to the 407v breakout pins, here's a convenient pinout of the SD card from the top: NC NC NC PA6 0V PA5 +3v3 0V PA7 PB2 NC I would suggest not to solder the three leftmost pins. You can also check for flux residue or shorts there. Care to upload photos of your work? Best, Andy

Glad to hear! Enjoy your sFM! You can get some cool sounds out of it but I found programming is not 100% straightforward.

Check back to the Core pin and whether the PIC is socketed properly or has adjacent shorts, check the interconnection header pins/socket.

Yep, the L4 superellipse caps were very popular and we sold the last sets over the weekend. More caps inbound but will of course take their time at the moment. Ordering a full kit would be possible if you were happy with the old clear-style caps, still some of those around. For LED soldering, you can just mount the LEDs flush against the PCB. They will not fit through the case cutouts anyway. One user wrapped his panel LEDs with heatshrink (Schrumpfschlauch) to block light from neighbouring positions. It's a personal preference though; some like the effect of LED mixing. Best, Andy

Mouser 517-929834-07-36-RK is one of the longest "standard" headers but only single row. Check the datasheet on the Mouser page and you will find other parts. None of the longer dual-row header 929710 are stocked apparently. But you could use a pair of single-row strips, which is what we do for the LoopA.

Maybe then check the data signals reach the shift register? You can cross-reference the PIC Core and DOUT schematics: http://ucapps.de/mbhp/mbhp_doutx4.pdf http://ucapps.de/mbhp/mbhp_core_v3.pdf If in doubt you can also disconnect the sandwich and run wires directly from the Core pins.

Pics are a bit blurry, but it looks like the LEDs have the correct orientation. You should be able to scope a (probably) 1/8 pulse on the LED cathodes anodes if that column's LED is illuminated. Likewise, you should see an alternating (but up to 1/8) pulse on the transistor base. Do the transistors follow the expected pinout? When uploading the hex file did you specifically choose the sammich one or "normal" MIDIbox FM?

Can you get any normal LED function? Touch up the soldering on everything to do with the LEDs (pin headers, ICs, caps, resistors etc.), also check LEDs have the correct polarity .

Hi, These encoders should be decent, so I wouldn't think the encoder had gone bad. Rather, there might be an interconnection issue. The 9th encoder is connected to pins 4 and 5 of J1, so check that you get good contact there. If the pins don't reach far enough into the through-board header you might get an intermittent contact. Check all solder points too as you might have a dry joint etc. Best, Andy

Sorry, didn't see your message as the notification settings were broken for a while. I can't say anything about Hauptwerk but you should be able to monitor debug events in MIOS Studio. I would try to diagnose the DIN/DOUT functions and matrices first at the hardware level.

I'm no NG expert, but what is the exact event/ the parameters used? Do you set specific ports for example? Maybe post the config and somebody could help.

Many thanks for reporting and I'm glad it works! Is the hub also connected to the computer and sending data that way? There is an OTG startup sequence where the devices have to decide who's the boss. Maybe things don't make it that far if there's too much going on with the datalines. Just speculation!

Sorry, I managed to upload one twice. The quell PCB functions as a terminator, so you clamp unused inputs to 0V.

I recently designed Eurorack versions of DIN and AIN, still need to test but hopefully in the next few weeks, @Antichambre maybe you should start your own thread as to not mix up things, thanks. Have fun! Andy