I removed it and went back to driving the codec’s master clock with the June 10th, 5. Module build for the audio driver is supported. The datasheet of the BCM page states two different methods of synchronization. I’m sending a 9. I2S wrong speed Mon May 09, 3: I suspected that, since I’m manually setting up the codec and ALSA doesn’t know what the codec is actually expecting, it was resampling or changing something.

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ASoC – AlsaProject

Module build for the audio o2s is supported. June 10th, 2. You also stated that you didn’t know if the internal clock mattered.

Then its reads a chunk of random data from it, and exits. Michael 1, 10 I2s Audio Mode with AlsaLib installation. If both the input ports are left enabled or configured incorrectly the captured audio stream may be noisy.

I2s Audio Mode with AlsaLib installation

Therefore, there is only audio output via PWM and no audio input. I2S wrong speed Mon May 09, 1: I’m out of ideas!


Down with automatic setup! Sign up or log in Sign up using Google. J2s least 3 of the sound programs I want to use have APIs that I can use to manually manipulate their audio output: A played fast on RPi codec: Set the different configuration parameters. Currently, there is no Plug and Play hardware for the Raspberry Pi, so you have two alternatives:.

ALSA i2s-master on 3.10.17

If I double the bit clock to 64xFS, it plays even faster! All Examples Functions Blocks More. Navigation menu Personal tools Log in Request account. But they should still obey ALSA, right?

Please note as of Wednesday, August 15th, this wiki has been set to read only. Install Support for Raspberry Pi Hardware. It is not supported by all drivers e. I hope this information will help you and that I’m not stating the obvious things you already know.

Also note the periodic skipping sounds, like dropouts, but periodic, which make me wonder if samples are being delayed or skipped or something. Thanks for looking it over. In any case, I have no idea where the I2S stuff is set in the kernel code. I will include lots of detail so you can see that I’ve done my work, but what I’m really asking about is how to manually force ALSA SoC to play particular settings over I2S, without having it automatically detected by the soundcard driver!


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The time now is I am working with a BeagleBoard running Linux 3. Email Required, but never shown.

I did a little bit of arithmetic to test my hypothesis: I see no connection there, and this looks like the sort of thing you’ll be up against: I suspect your problem may have to do with sample rates. From Texas Instruments Wiki.