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WMXZ

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      WMXZ replied to the thread Teensy 4.1 MEMS INMP441.
      The I2S MEMS microphone (especially the one from Adafruit ( SPH0645LM4H)) can have significant negative offset resulting in always negative values (MSB always set). I use ICS-43434 microphones, that have nearly no offset. You can get them e.g...
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      WMXZ replied to the thread U4 going short on teensy 4.1.
      Sorry, what is U4? Is that the TLV75733P on the Teensy 4.1?
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      WMXZ replied to the thread Calling teensy_post_compile without bootloader update?.
      AFAIK, bootloader update is only done once and only when necessary. Maybe I miss the problem?
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      WMXZ replied to the thread Problem of filtering a signal.
      The way I did this type of design is to generate me the filter in, say Matlab and then to convert the filter to biquads to be programmed to Teensy. Matlab has tools for that. I have not done it for a while, but I never have seem 20 biquads with...
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      WMXZ reacted to chipaudette's post in the thread Problem of filtering a signal with Like Like.
      I think that you are misinterpreting how to use the Teensy biquad filter. The teensy biquad class is not a generic IIR filter, it is a biquad. A biquad is 2nd order. There is no filter order to choose. I'm guessing that you might have thought...
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      WMXZ replied to the thread do..while inquiry.
      or while(x<5) { ... } which is even less typing
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