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Hardware Questions / Re: MIDI and SD Card
« Last post by mario on November 19, 2019, 10:48:30 PM »
Yes, the SD card slot is unfortunately bit too deep in complete unit (in acrylic it is a lot easier to access). That's mainly thanks to the brass columns that hold the case together, plus the additional 1.6mm of the enclosure... It was not feasible to have two versions of the board to make them fit both versions perfectly. The slot mechanism cannot be any closer to the edge as then the card will stick out too far in acrylic version, plus there are traces in the way that need to go around the edge and nowhere else (analog ground, bias and signal lines for right mic).

Tweezers are handy but I also used a door key with success when I was out in the forest and needed to swap cards (by the way, door key is such a versatile tool, you can use it instead of a coin for supermarket shopping trolleys!) If you hold the case it upside down, chance is the card will be ejected out by the spring mechanism, and if not, gentle knock will help Or a less gentle knock. No worries, the device is sturdy enough. I've dropped mine on tiled floor and nothing happened.

I have a halfway done "sync" app that will allow download the files via USB so you won't need to take the card out too often. Also upload new samples, once that's supported. But the card was mainly meant to be a "temp" space for recorded material. The capability to mangle recordings or use them as a background in some of the meditative channels is in the progress too.

But enough with the promises, here is something new for you guys to try. After you put the SD card in Gecho and power it on at least once, there will be file "update.htm" created. Open it in your browser and follow the instructions - hope that works! :)
Hardware Questions / Re: Glo turns on when charging
« Last post by alefoot on November 19, 2019, 08:53:07 PM »
Thanks for clearing that up Mario! Probably not worth making any changes  - please don't feel the need to spend time investigating further.
Hardware Questions / Re: Glo turns on when charging
« Last post by mario on November 19, 2019, 07:30:51 PM »
Yes that's expected behaviour. It's weird, I know... The reason is that programming the entire Flash memory (8MB) via virtual serial port takes a few minutes and someone would need to hold the power button down all the time (while in programming mode, CPU cannot keep the voltage regulator's "enable" line up). There is a diode that switches the regulator on when a voltage is detected on USB port. As Glo normally does not have this port accessible at all, this is not an issue, but in your case of DIY kit it may be annoying. Possible workaround is to keep the (+) button pressed while plugging in USB cable, that will switch it to firmware update mode instead. I think you could also desolder the culprit diode but from top of my head I am not entirely sure if that will cause another side-effect, would need to check the schematics.
Hardware Questions / Re: MIDI and SD Card
« Last post by Angus Byrne on November 19, 2019, 10:52:04 AM »
Well, I now have a SanDisk 32gb microSD card and... it works perfectly well as far as I can tell from the limited testing I’ve done.

Putting it in involves gently pushing it home with a tiny watchmaker’s screwdriver and getting it out requires a nudge from this to release it. Final extraction is easily done with the tweezers that come with my ‘Classic’ Victorinox Swiss Army penknife.

Still lots to learn. Onward and upward.
Hardware Questions / Glo turns on when charging
« Last post by alefoot on November 19, 2019, 09:52:45 AM »
Connecting Glo to a USB source to charge the LiPo turns it on, playing the selected first channel. Turning it off doesn't work, it turns back on immediately.
What did I do wrong, or is that the expected behaviour?
Hardware Questions / Re: MIDI and SD Card
« Last post by yewtreemagic on November 18, 2019, 06:28:16 PM »
I bought myself a 32GB Sansdisk MicroSD card, because I'm sure I noticed Mario mentioning that was the one he used, so it looks as if I'll be OK.

Like most of the others here though, I haven't really had a chance to try out the card as yet ;)

Hardware Questions / Re: MIDI and SD Card
« Last post by Angus Byrne on November 13, 2019, 03:01:24 PM »
Thanks for this clarification Mario. 32gb it is then.
Feature Requests and Feedback / Re: granular sampler
« Last post by mario on November 13, 2019, 12:06:58 PM »
Hi Jean-Luc, glad you are happy with it - thank you for your kind words! :) You've been lucky as we sometimes have more units built beforehand, in order to minimize errors we build a few of a certain model / colour / powering scheme...

I've just finished two new channels with longer looping, not using SD card yet but as they can lower the sampling rate there is enough space for many seconds. And it is interesting to change sampling rate while something is in the loop. One of them can reverse and warp (one octave up & down), another can apply low-pass, high-pass and flanger effect, all controlled by sensors. This will be available as an update shortly (after we're done with shipping of the remaining units, 2-3 weeks).

A channel that uses temp space on SD card is in progress as well. Making the grain pointer/size random is a very interesting idea.

Thank you for your suggestions!
Feature Requests and Feedback / granular sampler
« Last post by jluc on November 13, 2019, 07:10:38 AM »

i received the little box only 10 days after my order. What a surprise ! The few channels available are already amazing.. I dreamed of it !

When I used granular channel, I leave the record on (S2 on = loop recording), it's interesting for live improvisation.
It could be  interesting to allow longer recording time (maybe 5 to 10  second on sd card if not enough memory ?) and moving the player pointer  with IR sensor (or random value), and modify the grain size with another sensor (or random value). A possibility of reverse playing could be nice too.

best regards and congratulations for your great work
Hardware Questions / Re: MIDI and SD Card
« Last post by mario on November 12, 2019, 02:46:11 PM »
Hi Guys,

I've tested a 64GB SDXC card and it indeed does not work. This is because SD cards above 32GB do not use FAT32 file system but use exFAT instead. It may not be a good idea to format SDXC cards with FAT32 as you'd probably end up with 32GB of usable space (unless you can somehow create a 2nd partition with the remaining space). If you are not using Windows, there are tools that can format a single FAT32 partition above the 32GB (as that limit is merely imposed by Windows and hard limit for FAT32 is 2-16TB depending on sector size). I'd be careful with using any tool on a SD card that is not made or approved by its manufacturer as improper formatting may result in permanent damage.

I'm investigating how to make these larger cards compatible, as at the hardware level there is no issue, and the software framework is reportedly supporting them. If this works, it will require a firmware upgrade - which, ironically, is also performed by a SD card so you will need to find a working one (32GB or smaller) anyway.

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