Re: [beagleboard] I2S interface on BBB

2018-03-08 Thread Graham
>>> 2, Can I change MCLK frequences to 12 MHz while frame rate is 44,1 Khz? Do you really mean 12 MHz? or 24 MHz? Normally systems running 44.1 kHz frame rates use an MCLK of 44.1 kHz * 256 = 11.2896 MHz, or,44.1 kHz * 512 = 22.5792 MHz --- Graham == -- For more options, visit

Re: [beagleboard] I2S interface on BBB

2018-03-08 Thread Stuart Longland
On 09/03/18 05:24, Yiling Cao wrote: > By noise, do you mean analog background noise or digital related noise? If your BCLK and WCLK are up the spout, then the CODEC will not be synchronised to the audio stream and you'll get something that sounds like static instead of the intended waveform.

Re: [beagleboard] I2S interface on BBB

2018-03-08 Thread Yiling Cao
By noise, do you mean analog background noise or digital related noise? On Thu, Mar 8, 2018 at 6:17 AM, Stuart Longland wrote: > On 07/03/18 21:52, h...@olli-ai.com wrote: > > I'm try to use TVL320AIC3254 Codec with Beaglebone Black via I2S bus. At > > present, I can

Re: [beagleboard] I2S interface on BBB

2018-03-07 Thread Stuart Longland
On 07/03/18 21:52, h...@olli-ai.com wrote: > I'm try to use TVL320AIC3254 Codec with Beaglebone Black via I2S bus. At > present, I can play music but it hear noise. Attached is script to set > up this codec with these setting: WCLK=44.1Khz, BCLK=1.4112 Mhz, MCLK=24 > Mhz. It's been a long time

[beagleboard] I2S interface on BBB

2018-03-07 Thread hiep
Hi all, I'm try to use TVL320AIC3254 Codec with Beaglebone Black via I2S bus. At present, I can play music but it hear noise. Attached is script to set up this codec with these setting: WCLK=44.1Khz, BCLK=1.4112 Mhz, MCLK=24 Mhz. I have some questions: 1, Below is my hw_params. I want to set