Relays for switching i2s or other 3-wire audio bus?

mbcouple · 19th July 2005, 05:25 PM

I need a digital source selector, and was thinking that i would just use some 3-pole+ relays to do the job. Can anyone recommend a relay with at least 3-poles (4 would work, just leave the spare unused), that is small, and has very little loss of signal?
Thanks
Hans

Elso Kwak · 19th July 2005, 05:36 PM

Quote:

Originally posted by mbcouple
I need a digital source selector, and was thinking that i would just use some 3-pole+ relays to do the job. Can anyone recommend a relay with at least 3-poles (4 would work, just leave the spare unused), that is small, and has very little loss of signal?
Thanks
Hans

Hi Hans, Better use a 74VHC157.

mbcouple · 19th July 2005, 05:44 PM

Thanks, that looks like it will do nicely.
Hans

Elso Kwak · 19th July 2005, 05:51 PM

Quote:

Originally posted by mbcouple
Thanks, that looks like it will do nicely.
Hans

Hi Hans,
Actually it is working in my DAC (TDA1543 NON-OS) switching between I2S Direct and SPDIF through CS8412. Fourth signal is deemphasis.

Guido Tent · 19th July 2005, 05:56 PM

Quote:

Originally posted by mbcouple
I need a digital source selector, and was thinking that i would just use some 3-pole+ relays to do the job. Can anyone recommend a relay with at least 3-poles (4 would work, just leave the spare unused), that is small, and has very little loss of signal?
Thanks
Hans

Nais TQ2

regards

mbcouple · 19th July 2005, 05:57 PM

What are you controlling it with? I would like to get maybe a 4 input selector for a circuit i am working on.
Thanks
Hans

Elso Kwak · 19th July 2005, 10:01 PM

Quote:

Originally posted by Guido Tent

Nais TQ2

regards

Guido,
The contact noise would destroy the jitter performance:
http://www.diyaudio.com/forums/showt...075#post684075

dddac · 20th July 2005, 12:26 PM

Quote:

Originally posted by Elso Kwak

Guido,
The contact noise would destroy the jitter performance:
http://www.diyaudio.com/forums/showt...075#post684075

I have actually tried a straight wired connection, switches and relais and cannot hear any difference.... so if contact noise is in play, it does not change the sound print. Actually switching between a standard clock and a TENT clock (low jitter) shows clearly the difference.

doede
www.dddac.de

PS: trying to avoid another possible source of extra jitter, I would not use multiplexers to switch between signals where a relais or switch does the job also. But that is my opinion and experience

Guido Tent · 20th July 2005, 08:36 PM

Quote:

Originally posted by Elso Kwak

Guido,
The contact noise would destroy the jitter performance:
http://www.diyaudio.com/forums/showt...075#post684075

Elso,

My advise for the Nais remains. Study the datasheet, and you may understand that 1/F noise is low for these types. By measurement is appears to be low enough.

There is some 1/F work to do on your clocks by the way.

Elso Kwak · 21st July 2005, 07:02 AM

Quote:

Originally posted by Guido Tent
Elso,
There is some 1/F work to do on your clocks by the way.

Really, and how would I accomplish that?

19th July 2005, 05:25 PM	#1
mbcouple diyAudio Member Join Date: May 2004 Location: Indy	Relays for switching i2s or other 3-wire audio bus? I need a digital source selector, and was thinking that i would just use some 3-pole+ relays to do the job. Can anyone recommend a relay with at least 3-poles (4 would work, just leave the spare unused), that is small, and has very little loss of signal? Thanks Hans

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19th July 2005, 05:44 PM	#3
mbcouple diyAudio Member Join Date: May 2004 Location: Indy	Thanks, that looks like it will do nicely. Hans

19th July 2005, 05:57 PM	#6
mbcouple diyAudio Member Join Date: May 2004 Location: Indy	What are you controlling it with? I would like to get maybe a 4 input selector for a circuit i am working on. Thanks Hans