bk40

Loving the layout

Hi folks, As part of my project I took a filter tangent. 2 options came apparent the standard VA approaches which I have started but that can of worms was big and although working is still missing the diode filter gain correction. But realising...

I seen that this week brilliant how quick they added the option. Really like that site. (Bank balance doesn’t)

16MB PSRAM chips are now in stock in the UK from: https://thepihut.com/products/16mb-psram-chip-for-teensy-4-1 I just bought 6 for 3 boards.

Been a hard week. Last weekend I ended up messing up my latest teensy board so it no longer gets the encoder pulses from my microdexed. So after a few nights soldering and re soldering I took the decision to split the synth engine out. So now...

Hi @h4yn0nnym0u5e , thanks for reading the post carefully. You pinpointed exactly what I chose not to bring into this conversation yet: the application layer. The initial post covered only USB descriptors and raw UMP I/O because I wanted to...

12db Lowpass in action..

Looking good.

A quick update... Jeannie_2 is now drawing some nice-looking filter curves :) I still need to adjust the grid line relative to the cutoff frequency. The "12dB" button allows you to switch the filter from 24dB to 12dB, or vice versa. Jeannie_2...

I’ve not printed anything before so I’ll protype it on a board then look at the enclosure. Or I’ll break something and try yet another path 🙈

got a bit fed up with soldering and breaking things so I’ve went down the M5Stack for my prototype Dare say I’ll be in the M5Stack library later this week. Did you 3d print the case?

been working on the patch conversion and loading. Small side quest means my envelopes now have curves and can be updated whilst playing. All this is supposed to be done on my own project once I get through this training project 🙈 but loving the...

Wonderful. It works. I can now switch between linear and exponential envelopes. Thanks :love:

I assume that's a limitation of your Jeannie 1 project - with my code you could always set all of attack, decay and release to near-linear. However, you couldn't change the sustain level live; I've pushed up some changes to allow this, using...

Glad to have been able to help

Thank you very much. I have modified `effect_envelope.h`. I can now change the sustain while holding the MIDI note.

My next update is the filters page in Jeannie 2

I used Claude to examine the source code and then asked it to return a version that I could use but added options to change the linearity and be allowed to change all values whilst active. So at one point it’s perfectly linear and other values...

Hi Rolf, I had assumed that you used other envelopes since you had the nice slopes etc. I have been wondering about updating the current active voices envelopes and was about to go on this journey myself. For me it was the existing voices...

Thanks I went back to basics and removed the board and tested standalone. My teensy board is failing. Now my soldering is about as good as my equipment so good chance something got hit when I added the risers and psram. I have a new board that...

Thanks I went back to basics and tested with the examples and looks like I’ve got issues in hardware. Back to drawing board or resoldering dodgy connections

In my TeensyMIDIPolySynth (TMPS), I have implemented a 3-voice 12-poly synth. The audio portion runs on a T4.0 (overclocked at 816MHz with no additional cooling, hovering at or below about 50 degrees C & staying just under 95% loaded when all...

Don't play with Midi so not sure the answer to that one but as for the TFT's up to 1mhz in testing. And right now running a graphics program at 816mhz with no issues.

I tried a quick test with File > Examples > USBHost_t36 > MIDI > Basic on a Teensy 4.1 running at 720 MHz, with an Akai LPD8 drum pad controller connected to the USB host port. Everything seems to work fine, same as running at 600 MHz. I can...

I also tried 816 MHz and 912 MHz. Both seem to work fine. Only ran briefly, as this Teensy 4.1 doesn't have a heatsink. Also tried all the slow speeds. I'm surprised to see they all work, even down to 24 MHz. But this Akai LPD8 mk1 version...

Awesome guys really should have went back to the basic example and tried that. Will Do the same with my current hardware and likely fix something I’ve broken

Hi. I asked in my thread but didn’t get anywhere but I need to over clock the teensy 4.1 to get the polyphony I need but when going from 600 to 720 I then fail to detect anything on the host port. I have tried to initiate usbhost before...

Yeah I meant per micro controller. Looks nice and great to see a group take it to that level

Very nice looking synth. Guessing at 5 voice polyphony it’s not got a teensy under the hood.

Hello there - yup, enclosures are always an issue, and can be shockingly expensive to have made. As a hobbyist, ie one offs - I started wanting to use aluminium enclosures, and Breeze Audio (through aliexpress) used to offer a cut out service...

you can test the external psram with the example Sketch in the library . It will show if its detect and how much. I had solder issues and reflowed it and it read correctly after that

Hello Teensy Warriors, @bk40, I can relate to broken devices and code. Hardware is incredibly unforgiving, and requires money, time, and patience. I've been at this for a long time and I've failed to finalize many designs. I'm hoping my momentum...

Thanks I changed that! Let me know if you see anything else. I have integrated the OPC into a larger Data acquisition program and am getting good results so it looks like this can be done on a teensy!

Hi, I had seen various bit of this project whilst working on mine and hats off to you. Something I think is missing here is a base board that just works. I got frustrated after may designs works but broke so I flipped over my code to use the...

Good luck with it. As I said I’ve been there before. Previously we used many interfaces to the devices, all communication monitored and error controlled at the server then used an OPC central hub to link all the systems together. But that’s a...

Well in for a penny in for a pound. What’s the plan 😉

I seen it and you’ve done a lot of work. Well done it’s great to see. I take it you’ll prototype and then go for another kit? This one for me will be a one off I think as the restrictions have been hard, hence the left over extras. But really...

Moving back on to the hardware for my clone of a clone Started of simple, grew arms and legs or voices and filters. But nailed the supersaw and got some good filters. Ported on to my MicroDexed for now as that’s a solid build. It’s now...

Thanks for that. I have a few displays I bought from various sites currently doesn’t look to bad on those but I do like the mounting options on those. I did have encoders in the smaller version of my code so will revert back to look in to...

Can I ask about the screen do you feel it’s a much option and advise it going forward for others? Also the encoder work you’ve done is that part of a common library or just custom code? I liked the acceleration option very nice.

Advantech sell Adam modules which are professional level solutions that can be supported easily going forward. But if this ends up being a project you just have to go with then feel free to share and ask. Opc ua has been going for a while and...

if you’re insisting on staying with the teensy then use modbus tcpip to transfer the data? Or why does it have to be any of that if you have the data on a web page you’re already passed what opc was used for. You ca get off the shelf solution to...

I’m here for the audio stuff but my day job is Controls. I’ve learned that anything is possible but what is feasible? So what are you looking to achieve?

Hello everyone... I've had some time again and have continued programming the encoder query and graphics. With such a large display of 480 x 320 pixels, the graphics transmission time is a significant issue. A single-core processor like the...

Ok no help on the over clocking. But overclocked to 720 now have the 8 voices, sync and crossover active. Moved away from the html editor and aimed to enable the juce editor to work. Finally managed to but need to change it to be an audio...

Really like the response you’re getting from those encoders. Will keep an eye on those

Jeannie 2 Key function.. Boost = Bass boost on/off Level = Master volume HP Filter = High-pass filter on/off HP CUT = High-pass filter cutoff setting HP RES = High-pass filter resonance setting Panic = All notes off Shift = Toggles parameter or...

I wonder if anyone can help with an issue when overclock the teensy. My usb host stops connecting above the 720 overclock? Is this normal or something I can work around?

That is problem of M1000, not pot. It didn't have proper param smoothing. Back in the day computing was costly. They were cutting corners since it was just 6809 8-bit CPU running at 2MHz, sweating all the way with basic stuff. They were using...

Since there are so many synth projects on this forum, yet just a few talk about controllers for synths, I would like to introduce you to one of the projects I've been working on for some time... and I'm trying to motivate myself to finish it...