SPIF to DAW

Discuss John Bowen Synths - Solaris
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_Analog_
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Joined: Sat Feb 27, 2016 12:19 am

SPIF to DAW

Post by _Analog_ » Wed Aug 30, 2017 1:52 pm

I've connected my Solaris to one of several Digidesign 192s via SPDIF. I get the usual digital crackling noise. All my audio interfaces are clocked by an external Mutec iClock. What can I do to get rid of it?

Unfortunately the master clock is physically in another room. Would I need somehow to clock the Solaris - if so, how?

Any help would be very much appreciated

John Bowen
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Re: SPIF to DAW

Post by John Bowen » Thu Aug 31, 2017 10:50 am

You shouldn’t need to do anything special - connecting the optical will automatically slave the Solaris to the input. The chips will take the incoming clock rate and convert it to 48k, which is the only rate that works for the digital I/O (so, if you then took the optical output, you’d see that the signal is clocked at 48k).

Originally I expected we could run at 96k or other rates using the optical input, but this was not the case. I don’t know if this could be possible cause of the crackling you are hearing - and I don’t run any digital I/O here, so perhaps someone else on the Forum can offer ideas?

John B.

p.s. note that this is is not the same as the DSP rate for processing the sound engine algorithms, which are fixed at 96kHz.

_Analog_
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Joined: Sat Feb 27, 2016 12:19 am

Re: SPIF to DAW

Post by _Analog_ » Sun Sep 03, 2017 12:35 am

Hi John!

Thanks for your reply. I'll make further tests but I've also tried to open a 48kHz session to see if the crackling disappears... unfortunately it's still there.

Best regards

Sven

poupouye
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Re: SPIF to DAW

Post by poupouye » Thu Jan 25, 2018 4:38 pm

Hello Sven

I got some digital crackling noise too but I could find it's coming from the subtle change of midi tempo coming from my DAW (Cubase 9.5) wich is not perfectly regular :(

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