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Type: Posts; User: dslocum

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  1. Replies
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    Very cool. Why didn't I see this thread before!...

    Very cool. Why didn't I see this thread before!

    I very recently built the Notes & Volts TSynth and while is was pretty good, I was also disappointed by the anti-aliasing of the saw and square...
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    I'm still learning this SW environment.... ...

    I'm still learning this SW environment....

    How can I get a version with this new envelope.getState() method please?
  3. SV Filter - Higher resonance / self oscillate?

    How can I get higher resonance or self oscillation out of the SV filter? Is it limited for some reason?

    Thanks
  4. Jumping in here. I've been looking at the...

    Jumping in here. I've been looking at the Adafruit display too, and wondered if the 8357 library was ready for prime time. I'm making a 3.5" o'scope (landscape mode) and the displays I've gotten...
  5. I'd be happy to whip up something for the...

    I'd be happy to whip up something for the community and order PCBs if that would help.
  6. @mjs513 - Could you summarize this for both my...

    @mjs513 - Could you summarize this for both my benefit and others that may follow please?

    What (if any) modifications to TFT boards might be required? What TFT board(s) have you tried? Do you...
  7. @prickle, Stop bloody teasing us! :-) Of...

    @prickle,
    Stop bloody teasing us! :-)

    Of course - We would love to see what you've done.

    As mjs513 suggested, you are probably the best one to start a new thread. However, I'd be happy to...
  8. Gents, Forgive me for being a bit off topic here....

    Gents, Forgive me for being a bit off topic here. Feel free to throw me out or point me elsewhere if appropriate. I'm lurking and trying to grok as much of this thread as I can. Most of it is way...
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    ILI9341-t3 speed

    I've got the most recent 9341 from github and running on Teensy 3.2 with a generic SPI display. The demo works much faster than the original Adafruit, but not NEARLY as fast as what I see in Paul's...
  10. THanks for the super quick reply! Not sure what...

    THanks for the super quick reply! Not sure what happened to my post. POOF! :-(

    Actually, I was looking for the wiring for a Teensy 3.2, not an STM. I saw your #defines in the code, they didn't...
  11. Thanks for your suggestions. I looked but those...

    Thanks for your suggestions. I looked but those TFTs are don't seem to be available in the size (4") I need and are well out of my product budget.

    I need s solution for a cheap (< $20) 4" serial...
  12. TFT LCD Support for Pop-Up / Sliding Windows

    I couldn't find a answer to this elsewhere, so...

    I'm looking to create a GUI that supports pop-up windows. For example, if you wanted to pop-up a rectangular dialog box, you would normally need...
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    Thank you. It seems I tried setting the SVF to...

    Thank you.

    It seems I tried setting the SVF to high frequency values in the past, but recall there was some sort of limit. I'll try it again as soon as I get a chance. Thanks for the...
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    Portamento / Slew ?

    Hi,

    I've seen some threads that talk about doing portamento / slew, but haven't seen anyone post code or reference an object in the audio library that I might be able to use.

    I'm trying to...
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    7KHz High Pass filter

    Hi,

    I've been playing with the state variable filter, but it's upper range seems to be limited. I don't know about the math, etc. of filter design, but can anyone suggest what filter and...
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    OK. Glad to know the magic number now. I use a...

    OK. Glad to know the magic number now.

    I use a small assembly house rather than doing things myself, plus there a lot more components on the board, so it makes sense for me to go outside for...
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    Thanks for the prompt reply Robin! So if I...

    Thanks for the prompt reply Robin!

    So if I ordered 25 or 30 MKL04, would they be pick & place ready?
  18. Replies
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    I haven't asked Paul about this, but from this...

    I haven't asked Paul about this, but from this thread, can I assume that you guys have already determined that the 04 bootloader chips are NOT available in an auto-insertion friendly "tube" ? That...
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    Teensy Backside connections in production

    I'm curious how other folks are dealing with connecting to backside pads when going to production. I need to use the 3 touch pins on the back and need to figure out how to connect them to my host...
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    From Teensy 3.2 to Production

    I've now prototyped my project using a Teensy 3.2 and the Audio library. Now I want to create a low cost product using only the MK20DX256 and SGTL5000 codec. I have a few questions please....

    1....
  21. Here's my update on this... I've decided to...

    Here's my update on this...

    I've decided to use the Teensy 3.5, but use a 74HC4051 analog multiplexer to read my 8 pots into ADC2 core on A15. It's a relatively small change and an additional...
  22. Ha ha. I don't speak German, but I'm sure you...

    Ha ha. I don't speak German, but I'm sure you are correct. In the Thai language however, this would not be so much a problem, as these terms are rarely conflated. :-)


    Thanks. I understand...
  23. I'm not sure what the "(A0)" in the lines below...

    I'm not sure what the "(A0)" in the lines below do.

    "How to change AudioInputAnalog pin?
    AudioInputAnalog adc1(A0);"

    Do they force input A0 to ADC1 core ? Once ADC1 core is used for audio,...
  24. I went ahead and ordered a Teensy 3.5. I'm...

    I went ahead and ordered a Teensy 3.5. I'm looking at Revalogics Teensy 3.2 table a few posts ago and it looks like ADC1 is only free on 6 pins (A15 thru A20). What about the Teensy 3.5? Can I get...
  25. That makes me think... Sorry to go off topic...

    That makes me think...

    Sorry to go off topic here... If I develop on the 3.2 and get a prototype working, couldn't I design my own PCB with the same CPU? Is it possible to load a HEX file into...
  26. That's a cool solution, but it limits the options...

    That's a cool solution, but it limits the options for pin lengths and plugging into sockets I would think.

    Maybe I should just go for the 3.5 or 3.6 instead of the 3.2? It would probably be...
  27. No problem, and thanks for your details. I...

    No problem, and thanks for your details. I actually tried to search the PJRC website, but it can be difficult to find things sometimes.

    Off topic.... Great to see another Theremin player. I've...
  28. Hi and thanks for your reply. But I'm...

    Hi and thanks for your reply. But I'm confused....

    Are you saying that this Teensy has 2 ADC cores? If so, how do I select what core to use for audio and which for AnalogReads?

    Also, you list...
  29. Teensy 3.2 ADC audio input with 11 analog reads - Possible?

    I know the docs on the ADC audio input block says you can't use any AnalogRead() - and correct me if I'm wrong (just guessing here), but the ADC block is interrupt based and the AnalogRead() is...
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    I've seen references to that and I'm familiar...

    I've seen references to that and I'm familiar with the basics of Nyquist, but do you know of any articles that might explain the difficulties and possible solutions when playing faster?

    My needs...
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    Thanks Paul. I already have the audio board...

    Thanks Paul.

    I already have the audio board and it sounds great. My goal is to have a hardware sampler that can record, as well as playback at variable speed, forward and reverse, which is my...
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    Audio Hacker to Teensy 3.2

    Hi guys,

    I'm pretty new to the Teensy / Arduino, though I normally use PIC CPUs in my designs. I've got an Uno and a Teensy 3.2 that I've been playing with and it's an amazing experience.

    I...
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    I actually had the same question as the OP. I...

    I actually had the same question as the OP. I haven't tried anything with the Teensy 3.2 yet (too many things already on my plate), but I'd be curious if anyone has a solution that would do a good...
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    Granted this is an old thread, but I'm...

    Granted this is an old thread, but I'm considering learning with the Teensy 3.2, and I'm confused by the frequency / PWM table. I've looked at various threads and some articles, but wanted to be...
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    Thanks again one and all. Nantonos - thanks...

    Thanks again one and all.

    Nantonos - thanks for that link- good stuff. Sound like our designs have some things in common!

    Yes, I should have elaborated on my design. Let me try to clarify...
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    Thanks for the good feedback guys! However,...

    Thanks for the good feedback guys!

    However, the way I figure it is if I need to lookup and output say, a 12 bit sine wave using a LUT there would be 4096 output writes to complete one sine cycle....
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    Multiple (8) DAC outputs - how fast?

    I'm VERY new to the Teensy.

    Thinking about the Teensy 2.0 ++. Just found out about it today. Looks really cool. (BTW - hate the newbie term but if that's what I am, so be it)

    Anyway - I'd...
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