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General Discussion / Re: YAQAMACh34 - Yet another question about Midi (and channel 34)
« Last post by mario on September 28, 2022, 12:57:24 PM »
Hi Gilbert,

Thank you for your suggestion - I think it is possible to do it the way you imagine, if the PC has the required drivers and hardware connections, the VST will surely be able to completely control the Gecho, either via serial commands over USB, or custom MIDI messages.

But indeed this is not the path I'd want to take, the reason is simple - once you have the VST or software application, what's the purpose of our custom hardware? The PC already has a sound card, so you could do everything that Gecho does, with a lot more power and memory, completely in the PC. Can't think of any issues apart from that there might be a little bit more latency.

Anyway, building a VST plugin or a stand-alone app (with the need of supporting multiple operation systems) sounds like a lot more than I could possibly do on my own.

Looks like over the years Gecho strayed into the territory which we should better have avoided; adding the hardware (like MIDI or analog I/O) was a lot easier than making a good use of it in the firmware. We are keeping this in mind, and trying to not over-complicate our next products the same way 8) (for example the Wingdrum, it has MIDI-out so it can work as a simple controller, but all it does is that it transmits what is played, plus accelerometer data as cc messages. It has no MIDI-in or SD card - if it was there, the more advanced owners would naturally want to get more from it, e.g. use it as an externally controlled synth, ask about how to load custom samples, etc.).

While the majority of people say it already does a lot more than they expected (plus there are updates, albeit infrequent, that make it better over time), there are also users for whom the lack of certain features (more often assumed than promised) is a showstopper - I guess we simply need to do a better job of clarifying these things in our marketing.

Cheers,
Mario
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Mario,

My turn to reply after a long time - thought I was receiving mails on new replies.

Anyway, thanks a lot for the precise explanations. This helps understanding where you stand.

WRT the lack of a display, please add to the wish list : a kind-of-plugin that could talk via USB to the Loopsynth and display a window PC or Mac (easier somehow on as a VST if VSTs know about USB without midi).

Not sure this is the direction you'd like to take.

Gilbert
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Hardware Questions / Re: MIDI jack standard?
« Last post by mario on July 14, 2022, 07:11:16 PM »
Hi Michael, can't help you with the OP-Z but noticed that you have Chip Pro, what are you using it for? I've got it too, bought it when it came out, with a vague idea to turn it into a synth (everything that has a CPU can be a synth, right? 8) ) but I never figured what to do with it. The specs looked very promising back then, and the price too, pity that it was discontinued.
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Hardware Questions / Re: MIDI jack standard?
« Last post by Msmiley78 on July 02, 2022, 10:45:17 PM »
I have the OP-Z and the GechoLoopSynth V2 in the plastic enclosure. I have the Line Module from TE in the OP-Z which has Midi/CV/PO out & in, and I've got it connected to the Gecho. I am just getting ready to break the surface of this connection between these 2 devices. With the latest Firmware in the Gecho, the OP-Z should be able to make amazing things come out of the Gecho.

I would love any walkthrough you've tried in terms of configuration of the OP-Z's midi settings. I saw you used Channel 1 with the module track, which I'll try. I'm going to try to figure out how to train the Gecho to use all the Midi Pots in the Midi screen of the OP-Z. I would like to be able to control it that way. I could also use the OP-Z and direct the midi via Ableton possibly, through the OP-Z.

These are complicated dreams that I am working on, my midi experience goes back to the early 90's, but this is a different beast.  I would appreciate all comments, if anyone runs into this still.
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Thank you for your great feedback, and apologies for slow reply - we're in the middle of moving home (and the company) so I have been neglecting correspondence and the forum...

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I could finally find use my Minilab MKII (no 5-pin midi output) and Ableton plus a legacy midi-usb cable to test Channel 34 - works well, you can add that to the list.

Cool!  8)

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1. I have the same issue as jluc in http://gechologic.com/support/index.php?topic=175.0 - I would plead for relative by default (suggestion for next release).

It will be there, also some new cool effects that I am working on.

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2. While playing around with Channel 34, I noticed that the key were having an effect : the "keyboard leds" on the LoopSynth shows correctly which key is pressed, and mostly the sound/processing that outputs from the channel is very different. For the sake of completion, Line input only, some sort of gate effect (on-sustain-off) can be heard, with a slight pitch change related to the key press, as expected. Could you tell us what exactly is the effect (nothing in the doc).

This is the MI Clouds in the default, "granular" mode. If you attach a MIDI keyboard, the keys will control "pitch" parameters, and the knobs (if present), can control all parameters (in following order: texture, reverb, density, pitch, position, size, feedback, stereo spread, dry/wet, post gain) when configured in the "learning mode" as explained here in the "How to set up MIDI controls" paragraph.

There is also "freeze" parameter that is linked to sensor S3, you can get a nice sound from ne mic or line input, freeze it, then play it with the keyboard. Or you can set up a MIDI sequencer at input, then feed monotonous sound into the line input, and the pitch-shifter will create a melody from it.

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3. I tried playing the Minilab on various other channels ; it is somehow recognised by Channel 33, 34, 42, and maybe others.

Yes I think that by now it should be recognized in all channels that use the concept of pitch or chords.

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4. Finally, I believe that an up-to-date MIDI section in the manual would help. Not talking about a long term wish: midi for controlling buttons B1-B4.

That can be done, now that we have the learning mode, not only you can assign knobs, but also pads. From my experience, many controllers that have pads simply send out note on-off events from them, like if they were regular keys. It is not ideal, but on the other hand if you have a controller without pads, only with keys, and you want to control Gecho's buttons remotely, you can train it to recognize some keys that you rarely use (the lowest 6 keys) for that purpose.

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Many midi controllers have a 4x4 pads ; two rows could be dedicated to the short and long presses of buttons.

Maybe this would be handier than relying on note on/off, which can also be understood as long and short press of a button. But the training mode for pads currently only support 8 pads, that is not enough to cover 12 possible short/long presses of Gecho's 6 buttons. Ideally we would rather have a function per pad, covering also combination shortcuts, like SET+B1, RST+B4 etc... And to make it work for many different controllers, more complex configuration needs to be implemented, maybe in the form of config file on the SD card (much easier than adding another menu to configure it using buttons in Gecho.

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I don't know enough about midi implementation by vendors, but would guess there is some sort of standard for assigning Midi messages to these buttons

There does not seem to be one standard but on the other hand there is not not too many ways how an engineer can approach this problem, so I believe if we have 2-3 cases implemented that would cover 95% of all controllers out there.

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big picture: the Loopsynth could be a multi-function effect box that could integrate nicely with a studio

My original idea for Gecho (in 2018) was to make an amusing meditative box, weird and random, main motivation was for me to learn a completely new thing - how to build a DSP capable board, and teach it to process sound. There was no clearly defined roadmap of features... Thanks to all the feedback, it drifted to the more serious side over the years. But many things are implemented in a cumbersome way and it is very hard (and probably pointless) to redo everything at this stage, to have a better thought-out user interface. Also, the lack of display is a major problem, decoding those LED lights certainly is not fun for everyone. The potential to turn it into what you are imagining is there but indeed it all takes so much time (for the programmer) and I am afraid that it would only be used by 10 out of the 1000 people who bought it... Also from the economical perspective, for us to survive as a company we need to invent new things instead. Not saying that this will be left unfinished - but at some point we will need to draw a line for Gecho to not cross, and move all those new ideas to some stronger, faster platform with more memory - such as raspberry pi kind of Linux powered boards. For example Monome Norns is very versatile and in the shield version also quite affordable for all that it can do, plus working with custom scripts is easy enough to attract large community. That never happened with this project, perhaps as the low-level c/c++ is just too impractical to work with in a collaborative way, besides there is not really much headroom in the CPU or enough memory for all the ideas...

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Hire someone?

That would indeed be great, not something we can afford now but if we had extra hands helping to build the synths, or even to test, pack and ship them (which has always been unbelievably time consuming) we could focus on the software more. Finding a programmer to help with expanding the functionality would be good too, but even less likely to happen given the costs of such work, and also all the overhead and complications of managing the development effort remotely. Sometimes it is faster and easier to just do something instead of explaining how to do it to someone else. Maybe I'm just too sceptical about it, coming from the IT background. Of course for someone for whom the coding for DSP is a passion and who is used to work independently, and is not afraid to dig into other people's code, could be a good fit - but such people usually have stable jobs or own projects to work on full time (this is a company of 2 and a lot would need to change in the world / amount of sales / cost of material, before we can generate a 3rd salary).

Thank you for all suggestions, and I hope to have the update ready later in the summer.
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General Discussion / YAQAMACh34 - Yet another question about Midi (and channel 34)
« Last post by SuNo-san on April 27, 2022, 09:56:14 AM »
I could finally find use my Minilab MKII (no 5-pin midi output) and Ableton plus a legacy midi-usb cable to test Channel 34 - works well, you can add that to the list.

1. I have the same issue as jluc in http://gechologic.com/support/index.php?topic=175.0 - I would plead for relative by default (suggestion for next release).

2. While playing around with Channel 34, I noticed that the key were having an effect : the "keyboard leds" on the LoopSynth shows correctly which key is pressed, and mostly the sound/processing that outputs from the channel is very different. For the sake of completion, Line input only, some sort of gate effect (on-sustain-off) can be heard, with a slight pitch change related to the key press, as expected. Could you tell us what exactly is the effect (nothing in the doc).

3. I tried playing the Minilab on various other channels ; it is somehow recognised by Channel 33, 34, 42, and maybe others.

4. Finally, I believe that an up-to-date MIDI section in the manual would help. Not talking about a long term wish: midi for controlling buttons B1-B4.
Rationales : 
  • Many midi controllers have a 4x4 pads ; two rows could be dedicated to the short and long presses of buttons. I don't know enough about midi implementation by vendors, but would guess there is some sort of standard for assigning Midi messages to these buttons
  • big picture: the Loopsynth could be a multi-function effect box that could integrate nicely with a studio
  • Hire someone?


G
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General Discussion / Re: Loopsynth v2 - MIDI - Windows 10 - USB Midi controller
« Last post by SuNo-san on March 07, 2022, 01:29:48 PM »
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Forgot to say that the "MIDI to USB IN-OUT Interface Cable" mentioned above can be actually used with Loopsynth, in order to connect it to PC and then control it from a DAW. Not all of these cables can send all MIDI messages very well, I think many struggle with SysEx, but should be OK with basic control - sending notes and CC messages to control parameters.

Indeed, I have two of them - one works very well (for communication from Ableton to Loopsynth], not the other (at all).

Thanks again, Mario.

G.
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General Discussion / Re: Help with mellotron (channel 221)
« Last post by SuNo-san on March 07, 2022, 12:32:16 PM »
Thanks Mario. I will try that on the samples I want to load - I used these as a test of the functionality.

G.
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General Discussion / Re: Help with mellotron (channel 221)
« Last post by mario on March 07, 2022, 10:28:46 AM »
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Now it works, however only with one note at a time ; playing two or three creates some artefacts

The reason is that there is no automatic level normalization, or any control over their mixing volume, data is simply added together. If the samples are loud enough, even mixing two of them will likely overshoot the headroom. This requires better preparing the samples. For example, normalizing by peak to -10dB will make sure that no sample is beyond 33% of the dynamic range, mixing 3 voices will then never cause clipping. Normalizing by RMS / loudness perhaps makes more sense, but I'm not sure how to choose the levels, may require experimenting to find out where will they sound balanced. Or maybe just adjust the volume of each sample by 50-60%, chance is that the clipping will be gone.

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Also, contrarily to the doc, I can play more than 3 notes at a time (I believe 10? Have no more fingers).

If you play more than 3, the newer voices will be replacing older, there is a limit to how many files on the SD card can be open and read from at the same time. It is probably hard to notice what happens now that it all sounds distorted.
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General Discussion / Re: Help with mellotron (channel 221)
« Last post by SuNo-san on March 06, 2022, 10:18:18 PM »
Blindness... the naming came from bulk processing of the original filenames...

Now it works, however only with one note at a time ; playing two or three creates some artefacts : some noisy interferences that I don't know how to describe - I could record a sample if you can't reproduce it. attached is the correctly named directory.

Also, contrarily to the doc, I can play more than 3 notes at a time (I believe 10? Have no more fingers).

G.
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