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Type: Posts; User: Alex Stahl

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    SD wave playback stutters on T4.1

    I have a biometric sketch running on a Teensy 4.1. I am experiencing intermittent audio stutters in wave file playback from the onboard SD card. Obviously, I should make a simpler sketch to isolate...
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    Awesome. Just ordered one. Thanks

    Awesome. Just ordered one. Thanks
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    For starters, there needs to be a line in setup()...

    For starters, there needs to be a line in setup() to allocate memory for the Audio Library. Something like:

    AudioMemory(12);

    Try one of the examples, e.g. Pass Through Stereo, to see if the...
  4. You're halfway there, since you are already...

    You're halfway there, since you are already saving the previous encoder value as Encoder1Lag.
    Take the difference of Encoder1Value and Encoder1Lag. That delta will give you a velocity estimate; you...
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    Referencing back to the original topic of this...

    Referencing back to the original topic of this thread... just wanted to share that most of the floating point audio library extension is working for me on a Teensy 4.0. I just removed the...
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    A 48k version of the audio library would be...

    A 48k version of the audio library would be delightful. No SRC please.

    Back to poking around to see how far above my paygrade is 48k USB on a T4.0.
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    Thanks for the tip, and so far so good. I have...

    Thanks for the tip, and so far so good. I have one Teensy 4.0 running as I2S master, generating test signals. I2S pins jumpered to a 2nd T4, running as an I2S slave and routing the audio to USB. No...
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    I am planning to test Teensy 4.0 as i2s slave...

    I am planning to test Teensy 4.0 as i2s slave tomorrow. To a second T4 master and also to an ADAU1701. I will post results and I welcome advice.
  9. Since last post I received four new...

    Since last post I received four new NW-AUD-ICS52000 boards, and tried them with T3.5, 3.6, and two other TDM sinks: a miniDSP MCHStreamer and an ADAU1445 eval board. Same symptioms all around. I...
  10. Reviving this old thread, to ask if anyone ever...

    Reviving this old thread, to ask if anyone ever has any success with the TDM MEMS mic eval board mentioned in the OP (https://www.notwired.co/products/detail/nwaudics52000-notwired-co/605574/).

    I...
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    I am very keen to help test this board. Have two...

    I am very keen to help test this board. Have two T4's and I don't mind paying costs... I'm on a tight schedule to try upgrading to T4 in an active project and this board looks great. Let me know and...
  12. Yes, I am asking if the SCLK/BCLK ratio change...

    Yes, I am asking if the SCLK/BCLK ratio change was made for I2S slave mode as well as I2S master mode in the current release. Sorry if that was not a clear and simple question to you, @WMXZ.

    If...
  13. Teensy as I2S Slave-- frame size question.

    Thank you Paul, for switching to 64-bit frame size for I2S master mode. I tried and failed to get that working a few years back.

    Does this change also apply to I2S slave mode? That would be nice.
  14. Glancing back at the start of this thread that I...

    Glancing back at the start of this thread that I totally co-opted, I want to mention that helping test and debug Teensy in I2S slave mode is also something I am more than happy to do. For a future...
  15. Hi Paul, Thanks for your reply. I know you're...

    Hi Paul,

    Thanks for your reply. I know you're busy with the new board, and that's pretty exciting!

    Yes I have a dual-channel 100Mhz scope (Tektronix, I'm from Beaverton after all) and have been...
  16. IS2 BCLK multiplier

    Digging a little deeper, looks like I need to change bits 7-0 of I2s0_TCR2. I'm using a Teensy 3.2 and understand that a generalised solution would be more involved, however I am on a deadline to do...
  17. I2S BCLK multiplier

    How tough? The BC127 bluetooth module also requires at least a 64x BCLK to work in slave mode. Seems like PTC3 is involved, but I haven't yet found where that is configured and would appreciate...
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