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Neo Air I2S interface without MCLK pin
Posted: Thu Feb 09, 2017 5:21 am
by meisam
Hi all
Any idea for Neo Air audio interfacing with popular DACs that needs a MCLK (256 * fs) ?
Many popular DACs like WM8731 needs a MCLK in excess of SCLK and BCLK.
As you know if needed to control the audio volume on a DAC it should be clocked by MCLK
for internal delta-sigma processor.
Re: Neo Air I2S interface without MCLK pin
Posted: Thu Feb 09, 2017 9:59 am
by chensy
You can use the Matrix - NanoHat PCM5102A module.The module uses TI's DAC audio chip PCM5102A and NS' low-noise, ultra-low dropout LP2992 regulator. PCM5102A's sample rates up to 384kHz and its resolution is 32-bit.PCM data style is I2S.
Re: Neo Air I2S interface without MCLK pin
Posted: Thu Feb 09, 2017 11:42 am
by meisam
chensy wrote:
You can use the Matrix - NanoHat PCM5102A module.The module uses TI's DAC audio chip PCM5102A and NS' low-noise, ultra-low dropout LP2992 regulator. PCM5102A's sample rates up to 384kHz and its resolution is 32-bit.PCM data style is I2S.
With thanks of your advise , PCM5102A does not have any control like volume attenuation or mute . I need a DAC with
control option.
Re: Neo Air I2S interface without MCLK pin
Posted: Fri Feb 10, 2017 10:52 pm
by Mindee
We didn't ever use WM8731 with this I2S channel on H3 board. And has no suggestion on that.
Thank you
-- Mindee