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Type: Posts; User: RogerD

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  1. Thanks for the heads up. That's my weekend taken...

    Thanks for the heads up. That's my weekend taken care of.
  2. Thanks for that Paul. I wound up using an AD420...

    Thanks for that Paul. I wound up using an AD420 which should do the job for the 16bit for a couple of bucks more than the DAC8565, er..bit and a couple of 12bit units I got from China for next to...
  3. You're welcome. It was surprising how little...

    You're welcome. It was surprising how little there was out there about control voltages but since it is basically an old analog synth consideration it isn't that much of a surprise really. Sheesh! ...
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    Really nice design and clean finish. Hope you...

    Really nice design and clean finish. Hope you made it possible to add a few more oscillator controls. It's very similar to the one I have been building off and on. With similar complexity I have...
  5. Yep! I'm setting up a MIDI to CV converter for...

    Yep! I'm setting up a MIDI to CV converter for an analog modular system (with 3 or four Teensy based modules thrown in) so I think I'll just have to go for a DAC tacked onto a cheap and nasty STM32...
  6. Sticky: Excellent! Thanks for that.

    Excellent! Thanks for that.
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    Like I said, we'll get used to it and adapt and...

    Like I said, we'll get used to it and adapt and new users will simply be blown away with the new capabilities the same way most are when they meet first meet Teensy. (There was an 800Mhz Arm CPU...
  8. Has anyone implimented a decent control voltage conversion yet?

    I have been trying to setup a decent control voltage conversion into and out of microcontrollers on and off for a while now. Getting a decent and responsive signal out to audio modules and other...
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    I was thinking down the same path as you I...

    I was thinking down the same path as you I suspect. Still, I am still stumped as to why he doesn't put out a decent PDF manual on the essentials of these boards. You know, pinout descriptions, more...
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    It is looking interesting Mr Stoffregen. I...

    It is looking interesting Mr Stoffregen. I wonder why you changed the pinout arrangement towards incompatibility with the old audio board and what the "Digital Audio" pins on the pinout map are...
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    Sticky: Unfortunate that the pin allocation was...

    Unfortunate that the pin allocation was re-arranged. I'll just have to bodge up an adapter. What I am most curious about are the numerous "Digital audio" pins on the board pinout map and in what...
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    Sticky: Just received my Teensy 4.0. Looks interesting...

    Just received my Teensy 4.0. Looks interesting but can't do much yet. Is there any information out there yet on the specs of the audio implementation on the board or how to get the audio card going...
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    OK. Did a compile this morning in Debug mode and...

    OK. Did a compile this morning in Debug mode and most problems went away except for the failing mixer set (with only a brief assessment) and the lack of signal from the line-in. The discrepancies...
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    I gotta admit I'm not even a tech trained guy...

    I gotta admit I'm not even a tech trained guy (which explains why I should be watched and corrected).
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    I wouldn't even have thought of that almost one...

    I wouldn't even have thought of that almost one step upgrade without you hitting me over the head with the obvious. Thanks much for that. It hasn't solved the problem completely but it has at least...
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    About LTO? In the Arduino IDE with Teensyduino...

    About LTO? In the Arduino IDE with Teensyduino "Tools" menu under the "Optimize" branch where you can set the compilation options (for what I assume is the compression level of the uploaded code for...
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    OK, it was an informative weekend. On the...

    OK, it was an informative weekend. On the suggestion of Defragster I did an overdue reinstall of the Arduino IDE to version 1.8.5 (from 1.8.1) and put in your latest Teensyduino 1.4. The results...
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    I gotta get less sloppy with my postings here. ...

    I gotta get less sloppy with my postings here. Yeah, I should have said that the peak was around 50%. It was Idling at about 48%. There is about three obvious and simple lines of code at the top...
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    It would be the previous version of TeensyDuino...

    It would be the previous version of TeensyDuino before the recently released (1 before 1.40 at the moment) and the latest Audio library downloaded as a zip from Github. I've been updating the lib as...
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    Hey Paul, hows the marathon treating you? Hope...

    Hey Paul, hows the marathon treating you? Hope you are getting some holiday time.

    Yep. I put that in the cluster of info at the top of the code...

    CPU consumption sits roughly at a stable 50%...
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    So, no opinions out there? None at all? :(

    So, no opinions out there? None at all? :(
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    Update with more info

    First off the Midi library I am using is version 3.2 and not 2.4 as I said before (is there even a 2.4 out there?).

    Also, my apologies for putting up the current full code listing but simpler...
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    Wierd and frustrating ?bugs?

    I've been developing my synth project for a while now and have had some ongoing problems that I just can't iron out after trying for months. The description of these are in the top of my following...
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    It works fairly well. I have used the Arduino...

    It works fairly well. I have used the Arduino Uno sets to set up my Teensys 3.2, 3.5 and 3.6 for prototyping but have had to cut and sand the pin headers a little to make them fit end to end for the...
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    Suggestion for the Envelope shaper

    While coding for my synth project I was a little surprised (only a little) to find that there doesn't seem to be any kind of event feedback from the envelope. At first I thought it would be good to...
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    I've always found a bit more drain from my...

    I've always found a bit more drain from my various Arduino based projects than I liked but pretty much took it for granted but now that you mention it I am going to have to give it a decent analysis....
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    Excellent mate! I gave it a quick test drive...

    Excellent mate! I gave it a quick test drive this morning and it did the trick very nicely. It was agonizing working out how to apply it to code taking all of 90 seconds and two sips of coffee.
    ...
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    Back when I was using the 10K pots I did get...

    Back when I was using the 10K pots I did get intermittent cross talk at worst. It was more a curiosity than a concern at the time. I put it down to possible bad connections but changing the pots...
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    The code I put in my second posting is what I am...

    The code I put in my second posting is what I am using at the moment which is just five pulls on the pin in a loop. At a rough test a while back it seemed to do the trick better even than just...
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    Fantastic. That's the kind of starting point I...

    Fantastic. That's the kind of starting point I was looking for. Thanks for that.
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    Yeah Paul. I was wondering about that the other...

    Yeah Paul. I was wondering about that the other day. Odd I'd never actually thought about how a log pot was set up before but then over the years I have only used them rarely. A stepped/layering...
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    I tried quickly testing it with my old CRO and...

    I tried quickly testing it with my old CRO and came to the conclusion that it had to be the way the ADC was seeing things but it couldn't hurt to check again more carefully with a multimeter. I've...
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    Thanks for the brilliantly rapid response...

    Thanks for the brilliantly rapid response Theremingedieur. I think I should have been more specific. I've been in a bubble with this thing for some time now and forgot that my info might not be...
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    Teensy Pot linearity

    Hey folks, I've been working on a synth project with the Teensy 3.6 and Audio card (fantastic work Paul S. by the way, greatly appreciated) and I have hit a problem with potentiometer accuracy. The...
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