SRC4190 RDY　LOW->HIGH

Hisanori Tanaka

Other Parts Discussed in Thread: SRC4190

Hi All,

LRCKI to shrink or stretch the time of 20ns or so.
RDY　is sometimes down.
When RDY is LOW ,the rate estimator is in transition.
Audio signal is continuously output.
What happen output of audio signal,when RDY become HIGH?
Does SRC4190 update internal coefficients?
Please tell me.

Best Regards,

H.Tanaka

over 12 years ago

0 Dominik Hartl11 over 12 years ago

TI__Guru 74386 points

You should mute the audio signal when /RDY is high (the signal is not valid during this time).

Connect /RDY to MUTE (pin 14) for auto mute.

0 Hisanori Tanaka over 12 years ago in reply to Dominik Hartl11

Prodigy 30 points

Dear D.Harti

I understand.

I　have two question.
Is it mean that SRC4190 can not work sampling frequency of variable pitch playback ?
SRC4190 can sense How many difference edge of LRCKI and LRCKO ?

Please tell me.

0 Dominik Hartl11 over 12 years ago in reply to Hisanori Tanaka

TI__Guru 74386 points

I don't think you can use the SRC4190 with a system that achieves variable pitch playback by adjusting the sampling rate because during adjustment the PLL may lose lock and you'll get drops in the audio.

0 Hisanori Tanaka over 12 years ago in reply to Dominik Hartl11

Prodigy 30 points

I understand first question.

For the second question, I will change the way of question.
RDY is all work? By detecting How much minimum jitter of LRCKI?

Audio

Audio forum

SRC4190 RDY LOW->HIGH

SRC4190 RDY　LOW->HIGH