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  • alex6679's Avatar
    Yesterday, 08:54 PM
    Ok, now I understand your setup. I didn't try to reproduce exactly your setup, but had closer look at delays and compared some waveforms with and without dithering. My reasoning was that maybe I also had the delay but...
    41 replies | 1204 view(s)
  • alex6679's Avatar
    Yesterday, 06:54 PM
    Thank you for the code and the information. The buffered time, input frequency,... are totally normal. The processor usage of the audio library is quite low, but we don't know how many recources are needed by the other...
    41 replies | 1204 view(s)
  • alex6679's Avatar
    06-04-2020, 08:13 PM
    I am glad that it is working, but I am still wondering about that high latency in combination with dithering/noise-shaping. Is your setup quite performance demanding? Did you have a look at the processor usage? Are you...
    41 replies | 1204 view(s)
  • alex6679's Avatar
    06-03-2020, 07:44 PM
    Ok, I made now some changes at the asynchronous input. It is now also a friend class of the AudioOutputSPDIF3 and uses (as the other spdif input) also config_spdif3() of the output class to configure the spdif input. I...
    41 replies | 1204 view(s)
  • alex6679's Avatar
    06-03-2020, 09:11 AM
    As far as I know, it's better to first initialize the input object, so that they are updated first during the audio processing. If the outputs are initialized first, some additional latency is introduced. But I am not...
    41 replies | 1204 view(s)
  • alex6679's Avatar
    06-03-2020, 08:56 AM
    The main problem that caused the crash is a bug in the async spdif input. The spdif receiver is configured after the dma transfer is already started, but the receiver should be configured first. I can't remember at...
    41 replies | 1204 view(s)
  • alex6679's Avatar
    06-02-2020, 08:09 PM
    Hi, regarding the AsyncAudioInputSPDIF3: If you post a minimalistic example that crashes here: https://forum.pjrc.com/threads/58539-Teensy-4-SPDIF-input-ASRC, I will try to reproduce it. Maybe I am able to find out what...
    8 replies | 176 view(s)
  • alex6679's Avatar
    05-31-2020, 05:48 PM
    Ah, ok. I think I understand. I also think that only using the Teensy is probably the simplest solution. The funny thing is, I think that I use a setup that is very similar to the one you first planned: I use 4 Teensys....
    41 replies | 1204 view(s)
  • alex6679's Avatar
    05-31-2020, 10:26 AM
    I think I don't completely understand what your task is. You want to use the Teensy as a slave? Does that mean that you want to use the spdif input signal to clock the audio pipeline? One feature of asynchron resampling...
    41 replies | 1204 view(s)
  • alex6679's Avatar
    05-01-2020, 07:19 PM
    Actually, I just remembered, that I used setup described above only for testing. Since everything is working, I integrated it into my diy surround processor. Here I am using the spdif input switch which is described...
    41 replies | 1204 view(s)
  • alex6679's Avatar
    05-01-2020, 05:54 PM
    Hi, you probably already found out how to connect a rca input, but for the sake of completeness: I use RCA. I implemented a kind of a standard spdif input circuit with a dual line inverter for level shifting and a pulse...
    41 replies | 1204 view(s)
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Teensy 4 SPDIF input + ASRC Yesterday 08:54 PM
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