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Type: Posts; User: alex6679

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    I had a brief look at the current spdif input to...

    I had a brief look at the current spdif input to check if it makes sense to make a combined class that could be configured as synchronous and asynchronous input. But I think that would make things...
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    Ok, I am using now DMAMEM for the input buffer...

    Ok, I am using now DMAMEM for the input buffer (+arm_dcache_delete((void*)src, sizeof(spdif_rx_buffer) / 2) in the isr) Also, I added the anti-aliasing attenuation + the minimum filter length of the...
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    Thanks for pointing out, that I should use...

    Thanks for pointing out, that I should use DMAMEM. I'll fix that tomorrow. If you really want to replace your version, then I can change the name. But resampling needs quite some ressourcen (Mostly...
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    I noticed that you already implemented a spdif...

    I noticed that you already implemented a spdif input some weeks ago, when Paul added it to the audio library. At that point I also already finished my implementation. However, as you mentioned: Since...
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    Since my last post in December, I improve the...

    Since my last post in December, I improve the asynchronous spdif input. Especially the PID controller, that adjusts the sampling distance to the current input frequency. I also added a short...
  6. Today I did some further tests. The last time I...

    Today I did some further tests. The last time I only checked if the channels are all in sync. This time I tried to test if channels get swapped sometimes. The minidsp usbstreamer that I use must be...
  7. Hi, I am also using an I2S input of the T4 and...

    Hi,
    I am also using an I2S input of the T4 and today I did some tests to check if the I2S channels are sometimes out of sync. My setup is: Laptop -> Minidsp usbStreamer -> (4 stereo i2s channels)...
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    Teensy 4 i2s quad to oct input working

    Hi,
    in addition to data channel 0 of sai1, I got the data channels 1/2/3 working. So it's possible to receive 2/4/6 of 8 audio channels with sai1 of T4. The problem is that the block that...
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    Hi, I finally published the code for the spdif...

    Hi,

    I finally published the code for the spdif input on github:
    https://github.com/alex6679/teensy-4-spdifIn
    There are also two very simple examples (example0.cpp and example1.cpp) that show how...
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    Hi, today I planned to make some final test with...

    Hi, today I planned to make some final test with the spdif input. I especially had a look at the behavior at different input frequency from 44,1 to 192kHz. I ended up with making various changes and...
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    Ok, I'll publish the code on Github tomorrow.

    Ok, I'll publish the code on Github tomorrow.
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    Teensy 4 SPDIF input + ASRC

    Hi,

    since this is my first post here, I would like to tell something about me. Regarding the teensy I am mainly interested in its audio capabilities. About one year ago I started my first DIY-DSP...
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