DAC system clock

blimp82 · 26th September 2009, 07:38 AM

hi all

Im looking at the pcm1741, as i would like to make a DAC to convert I2S to audio. And as easy as possible, i may add, as it more a proof of concept than HIFI - just yet.

The PCM17xx together with many others DAC uses a master clock(clk), where the clk is a multiplum[128-1152] of Fs.

What will happen if the clk is not the right multiplum of Fs, for instance: clk is chosen to be 128xFs. But Fs changes from 48 to 44.1. What will happen then, will the music sound terrible?, will the dac crash?

Regards Tobias

jaycee · 28th September 2009, 03:01 AM

it won't lock and you will hear nothing, or garbage.

blimp82 · 1st October 2009, 12:08 PM

bummer..

Thanks very much for the answer, I was affride of that....

/Tobias

26th September 2009, 07:38 AM	#1
blimp82 diyAudio Member Join Date: Jun 2009	DAC system clock hi all Im looking at the pcm1741, as i would like to make a DAC to convert I2S to audio. And as easy as possible, i may add, as it more a proof of concept than HIFI - just yet. The PCM17xx together with many others DAC uses a master clock(clk), where the clk is a multiplum[128-1152] of Fs. What will happen if the clk is not the right multiplum of Fs, for instance: clk is chosen to be 128xFs. But Fs changes from 48 to 44.1. What will happen then, will the music sound terrible?, will the dac crash? Regards Tobias

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Clock locking system	ash_dac	Digital Source	0	3rd April 2005 05:17 PM
Measuring word clock jitter with Audio Precision System 2 possible?	deskmate88	Digital Source	0	24th December 2004 03:39 PM
system clock selection for cs43122/pcm1792/4/8 ?	rlim	Digital Source	0	23rd July 2004 05:35 PM
What System Clock Better 128,256,384,512 fs	azyx	Digital Source	4	1st April 2004 09:35 PM
I2S system clock (SYSCK) = Xfs?	Flemming J P	Digital Source	1	2nd March 2004 04:16 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

28th September 2009, 03:01 AM	#2
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	it won't lock and you will hear nothing, or garbage.

1st October 2009, 12:08 PM	#3
blimp82 diyAudio Member Join Date: Jun 2009	bummer.. Thanks very much for the answer, I was affride of that.... /Tobias