Home Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

Re: Good quality crystal oscillator?

38.28.103.123

The 6.144 MHz oscillator used in DACs is only there to allow the DAC to determine what the incoming data rate is based on a known reference. It should have no effect on sound quality and in fact can (and should) be disabled after frequency selection is made. Check the data sheet for the Crystal (Cirrus) CS8414 receiver IC. The accuracy for this use in unimportant.

The DAC locks on to the incoming data which has a frequency determined by the oscillator in the CD player or transport. Exceptions are when the DAC emplys a sample rate convertor (SRC) for 'upsampling' in which case a precision oscillator is used in the DAC to control the data rate on the output of the SRC.

A 'normal' CD crystal oscillator would be at the 256x frequency of 44.1K * 256 = 11.2896 MHz.

Dave



This post is made possible by the generous support of people like you and our sponsors:
  Signature Sound   [ Signature Sound Lounge ]


Follow Ups Full Thread
Follow Ups
  • Re: Good quality crystal oscillator? - Dave Ingels 20:25:05 02/29/00 (0)


You can not post to an archived thread.