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    they won't be crazy; the input will go up to 1/2...

    they won't be crazy; the input will go up to 1/2 VREF and sit there (also see here); so yes, there might be ways of dealing with this in software, though doing it in hardware seems to me the...
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    sorry for being unclear: i didn't say put 100k...

    sorry for being unclear: i didn't say put 100k after all the CVs, i said keep in mind the ADS8688 inputs behave weird when floating (which they will, under certain circumstances, in your schematic as...
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    i also have difficulties figuring out what's...

    i also have difficulties figuring out what's going on, but fwiw ... keep in mind that the ADS8688 inputs can't float* (because of the way the integrated front end works). that would happen though, if...
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    received the 1062-beta board -- thanks! no...

    received the 1062-beta board -- thanks!

    no boot-up issues when using external power! (see #1995)

    quick question about "Drive Strength":

    i've been playing around a bit with a SPI DAC...
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    fwiw / re post #4, the OSC...

    fwiw / re post #4, the OSC (https://github.com/CNMAT/OSC) and MIDI libraries both work ok.

    (NB: i didn't extensively test all the various options (like midi clock), and didn't test USB (yet), but...
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    it's not very dramatic. i mainly wanted to see...

    it's not very dramatic. i mainly wanted to see how fast things can go. fwiw, i've tested with a board which has a 8 channel ADC and 8 channel DAC on the same SPI bus, both devices have 32 bit wide...
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    question about "FRAMESZ": would it make sense...

    question about "FRAMESZ":

    would it make sense to maybe integrate this with, say, SPISettings? further upthread KurtE mentioned something along these lines ("a) Update Transfer16 should be...
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    many thanks! (also @mjs513) (oh, and ... with...

    many thanks! (also @mjs513)

    (oh, and ... with an eye on the 1062, will the pads for the usb signals still be centred / aligned with the VIN/GND pins?)
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    slightly OT, my apologies -- does anyone (or...

    slightly OT, my apologies -- does anyone (or Paul) have the part-number for the pogo pins used on the beta breakout-board? i can't seem to find the right height on mouser ... thanks!
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    fwiw, not 100% whether that's what you're seeing,...

    fwiw, not 100% whether that's what you're seeing, but i remember i had weird noise issues when directly interfacing the T3.x ADCs with an op amp. a small series resistor (51R or so) fixes/d it.
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    ... just remembered this again. possible that the...

    ... just remembered this again. possible that the pinout on p.1 (and above code) is wrong on UART2 / CTS?

    on p. 472 of the IMXRT1050RM datasheet it says CTS = AD_B1_00, which would be pin 19,...
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    ok, just removed the 22R resistor and populated...

    ok, just removed the 22R resistor and populated the other pad with 220 ohms and ... it works (i didn't add the 1M pull-up yet).
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    perfect, works! (fwiw: using LM1117-5, as...

    perfect, works!

    (fwiw: using LM1117-5, as above. i've tried with two different 12V supplies, it'll come up every time now; previously it wouldn't boot at all without the MIC803)

    re T4: should...
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    sure (can't do it before Saturday though ..., i'm...

    sure (can't do it before Saturday though ..., i'm out of town for work)
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    fwiw, the "metal synth" you linked doesn't even...

    fwiw, the "metal synth" you linked doesn't even seem to track V/oct, so from that perspective whatever you end up doing probably won't matter too much ... (i can see a "cut-off" input, which i'd...
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    should i try to hack my board for PMIC_ON_REQ and...

    should i try to hack my board for PMIC_ON_REQ and see if that helps? just to make sure: i'd put a 2.2M or so resistor between the two test-points (= pull-up), and populate the second 0402 resistor to...
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    i'll hook up the 12V supply when i get back from...

    i'll hook up the 12V supply when i get back from work. what i can say is that the board does boot up properly when i hot-plug the 5V regulator (i.e., with pre-started 12V, only then plugging the 5V...
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    sure, this is one i had access to this morning....

    sure, this is one i had access to this morning. yellow is VIN, blue is 3v3:

    16122

    in this case, the 5V regulator is a LM1117, with 10uF at the input + output (this is the thing in question)....
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    thanks, Paul. i've tried but it doesn't help it,...

    thanks, Paul. i've tried but it doesn't help it, unfortunately. fwiw, i've tried with three different PSUs (both linear and switching), which either feed a local 5V LDO (800mA) or a RECOM DC/DC...
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    yeah, hung / not booting, 'temperamental' was...

    yeah, hung / not booting, 'temperamental' was vague phrasing, sorry ... it looks much like the issues reported here, PSU coming up too slow; i have some leftover MIC803s (140ms), so i figured i might...
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    hi ... a question about the "ONOFF" pin/signal: ...

    hi ... a question about the "ONOFF" pin/signal:

    it looks as if T4 is somewhat temperamental with it comes to using (certain) external power supplies, much like T3.6 (but unlike T3.2). in the...
  22. fwiw, i've also given this a spin on some...

    fwiw, i've also given this a spin on some prototype module i had lying around https://www.instagram.com/p/BujANL0ot-o/ ... butchered up the code a bit to make it work with CV/gate. it's great fun;...
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    fwiw, it's more questions rather than feedback: ...

    fwiw, it's more questions rather than feedback:



    is/will be FlexSPI2 as, say, capable as a/the second SPI port? (sorry if this was discussed previously in this thread, it's grown a bit...
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    fwiw, there's probably no "go to" way, but you'll...

    fwiw, there's probably no "go to" way, but you'll probably find there's only so many ways you want to do this. it also somewhat depends on what it is you want to do (pitch or LFO/envelope type CV)....
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    that i've found, perfect. thanks. trying to get...

    that i've found, perfect. thanks. trying to get something like the 'flexible scan mode' working, we'll see. ... i've only had the thing for a couple of hours; still have to digest a lot (like is...
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    great, thanks. i can't seem to find the ADC...

    great, thanks. i can't seem to find the ADC library though, hence my question ... just the old repo https://github.com/pedvide/ADC

    edit: ah, ok. hadn't seen manitou's reply, confusion cleared up!...
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    hi, got my beta board (thanks!) and trying to...

    hi, got my beta board (thanks!) and trying to read/catch up ...

    quick question, on p.1 it says "stuff confirmed working [ ...] works ADC". that's re analog.c, right? or the "ADC" library? (in...
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    hi, not 100% (and it's getting late here ... )...

    hi, not 100% (and it's getting late here ... ) but shouldn't the line below read AD_B1_00 / 19 ( = GPIO16 | UART2_CTS) rather than AD_B1_01 / 18?
    ...
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    ... the conditioning circuits i've used for O_C...

    ... the conditioning circuits i've used for O_C won't be entirely suitable for this kind of thing; they're geared towards precision CV / "quantizing", but you've probably figured that out by now.
    ...
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    fwiw, incidentally the SP1200 also came up here...

    fwiw, incidentally the SP1200 also came up here the other day: https://www.muffwiggler.com/forum/viewtopic.php?p=2990006

    ... the gist being: the SP12/SP1200 should be fairly easy to emulate of...
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    fwiw / re 808-ish drums, it should be fairly easy...

    fwiw / re 808-ish drums, it should be fairly easy to port some of relevant Mutable Instruments stuff into "audio library" objects. see e.g....
  32. Thread: iOS / usb woes

    by mxxx
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    ... ok, sorry for the false alarm: the midi...

    ... ok, sorry for the false alarm: the midi device started working again after giving it (it seems) a different product name, ie despite the absence of V_USB. same for an old wm8731 break-out board i...
  33. Thread: iOS / usb woes

    by mxxx
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    i see, so something did change ... thanks. ......

    i see, so something did change ... thanks.

    ... i've never given much thought to finer details of USB detection (or rather, simply been following this:...
  34. Thread: iOS / usb woes

    by mxxx
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    iOS / usb woes

    hi,

    here's a question/issue, which, I suppose, is about iOS rather than teensy: i'm having trouble to get two of my projects recognized as a usb device on an ipad (ipad pro 2017, iOS 12.0, apple...
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    fwiw, the easiest thing (to avoid having the mod...

    fwiw, the easiest thing (to avoid having the mod the audio library) should be to simply wire i2s/i2c signals as per the "audio board": https://www.pjrc.com/store/teensy3_audio.html ; the signals are...
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    there's no reason why DAC8564 and ADS8343...

    there's no reason why DAC8564 and ADS8343 shouldn't work with teensy, so yeah, it'll somewhat depend on the details, and your DIY skills.

    - for a _standalone_ sequencer, it might not be a bad...
  37. IIRC that had to do with jitter/quality of the...

    IIRC that had to do with jitter/quality of the MK20's MCLK at various I2S_MDR_FRACT settings (see here) and downstream: "If you set I2S_MDR_FRACT to anything other than 0 or 1, the MCLK output is...
  38. Thread: file.seek(pos)

    by mxxx
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    fwiw, here's two ways to do this: 1. wait...

    fwiw, here's two ways to do this:

    1. wait until the header has been parsed, then seek: you'd do this approx. here

    2. slightly more complicated, separate the file open / file parse, play/seek,...
  39. note the schematic doesn't show the low pass /...

    note the schematic doesn't show the low pass / capacitor in the feedback path (it's value will depend on the sampling frequency; in case of OC: 560p ~ 8.6kHz cut-off / 16.7kHz Fs); also that's the...
  40. if you want to omit the +/- 12 V bus, you'd have...

    if you want to omit the +/- 12 V bus, you'd have to bias the op-amp* differently, like so:

    9341

    that's the circuit used at the O&C outputs, rather than inputs. in that case, V_out = -...
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    mmh, i'd also think this might be something of a...

    mmh, i'd also think this might be something of a niche requirement. but *if* this is going to happen, for the sake of DIY, i'd vote for one that can be soldered by hand easily, ie CS42432, CS42448,...
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    yeah, i remember he mentioned something about...

    yeah, i remember he mentioned something about trying. but i don't think he didn't followed up on it. one thing to make sure is the SPI clock is actually putting out 30MHz, not 60MHz or something,...
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    have you tried the gutted code / set-up works...

    have you tried the gutted code / set-up works with 3.2?

    anyways, while the OC code as is compiles for 3.6 (and i suppose for 3.5), i think you'd only get static on the display (... is what i've...
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    neat, our vague schemes for an OC mk2 looked...

    neat, our vague schemes for an OC mk2 looked somewhat similar, minus the extra SRAM; and still focused on CV applications, mainly.

    fwiw, the main bottleneck in the existing version was/is the...
  45. sure, i had sent a message on the 22nd. all...

    sure, i had sent a message on the 22nd. all sorted now. thanks for the refund.
  46. or what's the preferred way of contacting you?...

    or what's the preferred way of contacting you? PMs to PaulStoffregen on the forum are disabled.
  47. ok, i've sent a message via kickstarter. thanks!

    ok, i've sent a message via kickstarter. thanks!
  48. same here, shipping to Germany. should i be...

    same here, shipping to Germany. should i be worried? or contact UPS?
  49. Thread: K66 Beta Test

    by mxxx
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    quick question: am i reading the MK66 datasheet...

    quick question: am i reading the MK66 datasheet correctly in that (unlike T 3.1/2, but like T LC) there's no 470R resistor connecting V_REFH to VDDA, right?

    (sorry if this has been...
  50. here's one way:...

    here's one way: https://github.com/mxmxmx/eurotrash_mkII/tree/master/soft/libraries/Audio

    that's coming with some primitive prefetch thing, too.
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