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Old 29th April 2013, 06:54 AM   #1
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Default Jitters numbers of this te7022-24bit-96khz-usb-to-coaxial-converter ?

Hello

Anybody do know the jitters numbers of this te7022-24bit-96khz-usb-to-coaxial-converter ?

TE7022 24Bit 96Khz USB To Coaxial Converter I2S IIS by weiliang - $36.88 : Enjoy in your hi-fi project, diy tube amp, amplifier diy, amp diy

Anybody did try it, how good it is ?

Thank

Bye

Gaetan

Last edited by gaetan8888; 29th April 2013 at 06:57 AM.
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Old 29th April 2013, 10:35 AM   #2
oshifis is offline oshifis  Hungary
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I also purchased one, but I don't know the jitter. There is another thread about it here:
Hacked TDA1541 CD Player USB DAC Idea
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Old 29th April 2013, 10:11 PM   #3
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Hello

Did you try the PCM2707 or PCM2706 and compared them to the TE7022 ?

I've read that the jitter of those usb chips are less important than the jitter reductions of the receiver chips.

I've also read that wen we use the spdif out of usb chips, we can use the receiver chips to reduce the jitters, that we can not do with the i2s out of usb chips.

Any thought about that ?

Thank

Bye

Gaetan

Last edited by gaetan8888; 29th April 2013 at 10:22 PM.
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Old 30th April 2013, 09:54 AM   #4
oshifis is offline oshifis  Hungary
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That should be true. The optical/coax SPDIF output goes to the receiver chip which has its PLL for extracting the clock signal (and reducing jitter). The onboard I2S output drives the DAC chip directly, without any jitter reduction.
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Old 30th April 2013, 10:11 AM   #5
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Hello

I found out that this usb converter are quite same than the Teralink X2 (except for few details)

Thank

Bye

Gaetan
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Old 30th April 2013, 10:13 AM   #6
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Quote:
Originally Posted by oshifis View Post
That should be true. The optical/coax SPDIF output goes to the receiver chip which has its PLL for extracting the clock signal (and reducing jitter). The onboard I2S output drives the DAC chip directly, without any jitter reduction.
Hello

Maby reclocking the i2s bck before going into a TDA1541A could do better than spdif and a receiver chip ?

Thank

Bye

Gaetan
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Old 30th April 2013, 10:19 AM   #7
00940 is offline 00940  Belgium
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It's kind of true. I would still aim for the lowest jitter usb receiver, as costs differences aren't huge.

You can reduce jitter on I2S line if you run an I2S output into an ASRC (ad1896, src4192, maybe some more recent alternatives). A PCM2707-I2S-SRC4192 makes jitter irrelevant (provided the pcb layout is good and all similar disclaimers applying).
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Old 2nd May 2013, 10:33 AM   #8
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Quote:
Originally Posted by 00940 View Post
A PCM2707-I2S-SRC4192 makes jitter irrelevant (provided the pcb layout is good and all similar disclaimers applying).
Theory - yes. Real - no. SRC4192 not jitter immune. For example, AMB y2 use this. I can easy to hear change from (pcm2707 + crystal) to (pcm2707 + cmos oscillator) both with ( SRC4192 + Tent lab oscillator ). I change pcm2707 to cm6631a, I can hear it is better. i change cm6631a to XMOS, again, I can hear this difference. I am sure you will hear it also.
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Old 2nd May 2013, 10:52 PM   #9
00940 is offline 00940  Belgium
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Theory and measured. That has been discussed in the past with some measurements made by Bruno Putzeys. (see Any feedback on new CS8421 high-res ASRC? as a starter)

If there are differences in between the cm6631a, the xmos and the pcm2707, I very much doubt it's about jitter.
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Old 3rd May 2013, 01:51 AM   #10
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Quote:
Originally Posted by 00940 View Post
If there are differences in between the cm6631a, the xmos and the pcm2707....
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