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Review and Measurements of iFi iPurifier S/PDIF Digital Audio Filter

amirm

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#41
Maybe the Reference Forum could use a post with proper 16 and 24 bit J-Test WAV files...
Yes, we are both thinking of the same thing. Should make a collection and put them in a zip file like Bennetng did to make it easier to download. Let me work on that.
 

Blumlein 88

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#42
I have the ones JA uses at Stereophile for 44/16 and 44/24 I have attached. They have the 230 hz LSB toggle included which really isn't needed except for SPDIF inputs.
 

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amirm

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#43
I have the ones JA uses at Stereophile for 44/16 and 44/24 I have attached. They have the 230 hz LSB toggle included which really isn't needed except for SPDIF inputs.
Good deal as that matches the response of the 48 Khz one I posted:

upload_2017-12-29_17-30-59.png
 

Jakob1863

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#44
I have the ones JA uses at Stereophile for 44/16 and 44/24 I have attached. They have the 230 hz LSB toggle included which really isn't needed except for SPDIF inputs.
As Julian Dunn choose/constructed the J-signal especially for the examination of possible jitter effects when using the AES/SPDIF interfaces that of course is the main goal; if it is useful in other circumstances depends.
But anyway, the term J-signal denotes this special constructed signal and using it in that way will hepl to prevent discussions about "real/official" and "not so real/official" J-signals.
Why should we call a pure sine wave of Fs/4 kHz a J-signal as it only leads to confusion?
 

Superdad

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#45
Amir:
The photo of the product in your first post is not of the iPurifier S/PDIF device. It shows a device with a UBS 'B' plug. Perhaps you will want to correct that.
 
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#47
Amir,

I have a Chromecast Audio outputting from Toslink into a Schiit Modi Multibit DAC. From everything I have been reading, the Chromecast puts out a horrendous amount of jitter through its optical output. Thus, the iFi is recommended. Have you taken a look at the results from the output of the ifi being fed by a Chromecast? I just ordered the ifi, and I am wondering if I should cancel it?

Thank you so much for all your work. This is very informative.
 

amirm

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#48
Hi Drumsbanger. Welcome to the forum. I do indeed have a Chromecast audio that I will be measuring soon. Didn't have the mini-S/PDIF cable initially but purchased one last week so I am good to go. Will report back soon.
 
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