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  1. You can disable the high pass filters by altering...

    You can disable the high pass filters by altering the default config struct at register 0x05 to be 0xDC instead of 0x1C. Setting it to 0xC0 disables the single ended flags as well.

    This is just a...
  2. Just a quick update, I checked for the presence...

    Just a quick update, I checked for the presence of high pass filters on the output of the codec, there are none. I was able to synthesize low frequency to DC signals and output them without a...
  3. Signals 5Hz and under are definitely attenuated...

    Signals 5Hz and under are definitely attenuated on the ADC side. I haven't found the time to extend the API of the control_cs42448 object in the audio library to manipulate those additional...
  4. Looks good. I have a couple of suggestions. ...

    Looks good. I have a couple of suggestions.

    1,) Use IDC socket footprints for the output headers as well because of the pin orientation with VA/VQ opposite GND. IDC sockets are optional components...
  5. Nice, I find you have some good ideas there. I'm...

    Nice, I find you have some good ideas there. I'm a little curious what your minimal, DC-coupled IO filter stages might look like. Having the VQ pin available would be useful for DC-coupled...
  6. I've added some pictures and some more...

    I've added some pictures and some more information about this breakout in another thread.



    The CS42448 seems to have a built in high pass filter - Signals lower than 5Hz are heavily attenuated....
  7. kxmx_kaugummi - A CS42448 Breakout Board

    The Cirrus Logic CS42448 [datasheet] is a 6 input, 8 output audio codec supported by the Teensy Audio library using TDM signalling. Although there is a board design already available for this codec,...
  8. It's just stuck in a breadboard for...

    It's just stuck in a breadboard for experimentation right now. I don't have any photos (but I could take some when I get a chance). You're welcome to share it, it's CC-BY-NC-SA 3.0 licensed.
  9. I made this breakout...

    I made this breakout in order to experiment with DC coupled analog input and output stages interfacing with the CS42448. That one is for the Teensy 3.5/6 (built and working) but I have an (currently...
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    KiCad is great, but the learning curve can be...

    KiCad is great, but the learning curve can be steep. If you aren't concerned about having your design in "the cloud", I find EasyEDA to be more than capable enough for my hobby projects. The LCSC...
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    Ahh, I was mistaken about the possible output...

    Ahh, I was mistaken about the possible output voltage. Indeed as you say +-5V or +-0-10V. In any case, as I said, this part is used in the Polyend Poly2 specifically for generating CV signals,...
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    Assuming this is for the synth project you...

    Assuming this is for the synth project you mentioned in other threads, and that you want to use it to produce CV signals, this part might be an (expensive) overkill. Might I suggest the MAX11300 as...
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    I'm not sure what your plans are, but I2C !=...

    I'm not sure what your plans are, but I2C != I2S... Unless your external ADCs have, or are themselves microcontrollers with which you plan to do the pitch detection, the I2C protocol will have...
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    If you can handle a little SMD soldering, I made...

    If you can handle a little SMD soldering, I made a pretty compact breakout for the CS42448 codec with a use case like this in mind. The breakout is for the T3.2 (but would need only a few small...
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    Be aware that TDM needs some pretty fast clocks...

    Be aware that TDM needs some pretty fast clocks (11.2 & 22.5 Mhz for BCLK and MCLK respectively). If you have a decent scope, make sure your wiring can handle those signals.
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    After thinking about it for a bit, I wonder where...

    After thinking about it for a bit, I wonder where an 1170 Teensy would/could exist in the market. The performance of even the T4 seems to be bounded more by it's IO than anything else. The 1170...
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    Regarding the IMXRT1170, assuming a MAPBGA-289...

    Regarding the IMXRT1170, assuming a MAPBGA-289 pitch of 0.8mm, the package would likely be 14x14mm. This would fit well in the Adafruit Feather form factor which has become so popular.

    17782
    ...
  18. It depends on if you want simple CV gate outputs,...

    It depends on if you want simple CV gate outputs, or precise CV for V/Oct. tracking. For the former you can simply amplify any digital output signal to the desired voltage with an op-amp like a...
  19. Try PlatformIO. It has a remote framework which...

    Try PlatformIO. It has a remote framework which does what you want.

    https://docs.platformio.org/en/latest/plus/pio-remote.html
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    I second the link from Sin_Phi. ESP has a wealth...

    I second the link from Sin_Phi. ESP has a wealth of example circuits with good explanations of the design decisions/trade-offs alongside.

    If you want to experiment with different input and output...
  21. I'm not sure how far along you already are, but...

    I'm not sure how far along you already are, but I'd suggest taking the time to make some smaller scale prototypes. Velostat is actually a packaging material and not subject to the same quality...
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    There is a lot of development motion right now in...

    There is a lot of development motion right now in Tensorflow Lite for Microcontrollers with both Sparkfun and Adafruit releasing hardware targets for the framework.

    I recently looked into this...
  23. For what it's worth, I found my Analog Discovery...

    For what it's worth, I found my Analog Discovery 2 to be quite handy. It's an entry level scope, function generator, and a 16 channel logic analyzer. The price is alright for what you get, and the...
  24. I can help with the serial part... I ran into the...

    I can help with the serial part... I ran into the same problem, but since I couldn't find a solution at the time I wrote a little command line tool to convert the SLIP encoded serial data to UDP.
    ...
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    Reminds me of this: http://reactable.com I...

    Reminds me of this: http://reactable.com

    I think the surface is translucent with a camera inside at the bottom pointing up. The objects have patterns which can be easily recognized by a CV algo. ...
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    Simultaneous MIDI and OSC over USB

    I have been trying to get USB MIDI and OSC over SLIP encoded serial to play nicely together using the standard https://github.com/CNMAT/OSC library with its included SLIPEncodedUSBSerial class.
    ...
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    Yeah, just realized that myself as well: 14117

    Yeah, just realized that myself as well:

    14117
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    Very, very cool. If I understand correctly, the...

    Very, very cool. If I understand correctly, the 2N3819 would also work with with a 3.3v or 5v supply, but a rail-to-rail alternative to the TL-072 would be needed. Only a little bit more...
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    Could you please elaborate? I'd be interested in...

    Could you please elaborate? I'd be interested in what measures you took to stabilize the voltage on the floating wiper. Do you have a schematic available?




    I didn't really document the...
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    I ran into the same problem with my midi guitar...

    I ran into the same problem with my midi guitar controller. Long story short, you can't fix the linearity problem while pulling the wiper pin down.

    See...
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    I wonder what contributes to the vast difference...

    I wonder what contributes to the vast difference in latency between the focusrite and virtual interfaces. I assume the focusrite doesn't provide a general network interface to the OS, despite being...
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    Ah, I think I understand, it seems that hardware...

    Ah, I think I understand, it seems that hardware timestamping allows compensation for the "resident time" spent in the stack itself, right? I wasn't aware this is a requirement/recommendation, I was...
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    Oh I'm mainly just interested. I could do any...

    Oh I'm mainly just interested. I could do any number of transports, but AES67 seems a little like the holy grail, if you consider the success of dante and ravenna. I'm curious if the latency is not...
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    AES67 Audio over IP with Teensy/Arduino

    Hello all,

    I was wondering if anyone has tried to, or put any thought into implementing support for the AES67 audio-over-ip standard for use with teensy/arduino? It seems like a very promising...
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