Search results

I've sort of fixed it, I removed some cheap chinese hubs from my system, added what I think is a working hub, moved that Teensy to the hub and ut seems to work, Don't you just love windows.

Cheers, Only thing I can be sure about is that I have been programming both devices for a week or so with the same cable, moving it from one to the other, now I cannot see the display one it's hard to tell you anything else, I can program it, the red light flashes when I press the program...

So I've been working on a project with a couple of Teensy 4.1 devices, one controls the displays (9 of them) and one controls the synth. Yesterday the Teensy 4.1 that controls the displays refused to be seen by Windows 10, just not in the drop down and I get Winowd USB device not recognised...

OK, I set MYPSRAM to 4 to allocate 4MB and I tested the jerky display and now its smooth, I will carry on testing with all displays using the PSRAM

Hi Kurte how would i go about using the PSRAM for the framebuffer, i have 8 displays attached to my T4.1 but the first 3 are ok and the rest are jumpy, I think Ive maxed out the framebuffers, but I have an 8mb PSRAM chip installed.

I need a little help, I'm trying to connect upto 8 ST7789 IPS displays to a Teensy 4.1. so far I have 4 connected and they all initialize ok, but the first 3 run smoothly when updating, but the 4th is jumping when updating. I think I've run out of framebuffer space after 3 320*240 displays...

Thanks Mark Thats fixed it, wonder why I never came across it before, I have about 6 or 7 multi channel analogue MUX designs under my belt.

Help wanted with a MUX, I have an issue with a 72 channel MUX, it seems to have a problem on the range 0-127 at between 62-66 there is a pronounced jump, whereas 0-62 is fine and 66-127 is fine, but exactly at this half way point I get this jump which is annoying as it is where sliders need to...

Ok, thanks, I will test it in the morning

But frequency count does not work on a T4.1, it's not supported, although according to the blurb it is and countmany is just a .ino file according to the GitHub

It's a squarewave output of a vco, I have PWM control of it so I can vary the width. The voltage is 0-10v but I fed it through a voltage divider and Schmitt trigger to get a 3.3v pulse.

Recently I started adding autotune to a polyphonic midi to CV. I was looking at what libraries are available and there seems to be several. First I tried Freqmeasure and it didn't work, took a short while to realize it's not been developed past Teensy 3.2 and I'm using a T4.1. I think the same...

I can see a clock on the MCLK line, more of a sinewave but symmetrical in appearance. I have loaded another test sketch which plays a sinewave with alternating frequencies and this works on sound card 1, so I'm confident in my wiring.

#include <Audio.h> // GUItool: begin automatically generated code AudioInputI2SHex i2s_hex2; //xy=190,343 AudioOutputI2SHex i2s_hex1; //xy=431,344 AudioConnection patchCord1(i2s_hex2, 0, i2s_hex1, 0); AudioConnection patchCord2(i2s_hex2, 1...

I hope this is viewable, although I have 3 cards attached, I've only shown 3

Hi Paul Yes, that's the code I'm using with changes to the setaddress line to setwire, but even without the changes I would have expected card 1 to work. Also I tried an I2c scanner sketch and it couldn't find any cards which I thought was a bit strange. I will make a schematic and post it up...

I've got 3 boards wired up on each I2c output using the modified audio library that can address wire, wire1 etc and although everything compiled when I'm using the test code created by Paul recently no waveforms are generated. I guess I should just try and get sound out of one card first.

Thanks for the offer, very much appreciated. I think I have enough to be getting on with just to keep me busy here.

Thanks for the information, having a hard time with Putin and his missiles at the moment, but I will try and knock up a board tomorrow.

I will try to locate the boards as close to the Teensy as possible.

Thanks Kurt, I think I saw something posted by Paul showing a demo of multiple outputs for at least 2 cards. I will build a little test board with sockets for everything so I can mod and change as I need.

So I want to create 6 to 8 individual 16 bit audio outputs from a Teensy 4.1, my idea is to create a 6 voice oscillator board similar to the TSynth but with the dual VCO section only created with the Teensy. Problem is that I only have 4x Rev C cards left over from other projects and as I will...

You can use your existing TSynth to edit the headless ones. I'm pretty sure the TSynth sends out it's controls over midi and usb, so if you connect your TSynth to the USB host port of your rack versions it should be possible to edit them.

This is my Tsynth (Headless, all editing over USB or MIDI).

Having spent part of the day looking at this again, the Teensy 2.0 is not capable of supporting 6 DAC's with 6 gates and MIDI input, simply not enough pins to connect everything. So I migrated the code as much as I could to a Teensy 3.5 and added 3 more channels and 5 pin DIN midi in using a...

Looking at this project a bit more in depth, it is 3 channels monphonic, where as I'm looking for a Polyphonic MIDI to CV converter, maybe too much required to convert it to 6 channels poly with 5 pin DIN midi.

Hi, do you plan to release the schematics for this impressive project

Thanks for the reply, much appreciated. I can probably build it ok, analogue and digital circuits are not a problem for me, I've been in IT for over 40 years mainly in hardware. I would say add three more DACs to the circuit and the MIDI in with onto Isolator. Coding is another matter, its...

Nice project, do you think it would be possible to expand it to 6 note polyphonic, I have a teensy 3.5 available for the extra pins etc. I don't need the pitchbend as that is handled elsewhere, but Pitch, velocity and gate for 6 notes would be awesome, looking at the code it seems fairly easy...