- Joined
- Nov 6, 2022
- Messages
- 914
Hi Onlyoneme,
No, it didn’t fix in today’s release. I meant the next version. Thank you!
My Pro tests
- Thread starter onlyoneme
- Start date
No, it didn’t fix in today’s release. I meant the next version. Thank you!
I've decided to evaluate a latency over spdif in to spdif out.
My PC has been connected to the usb port of S2 Digi, then S2 Digi connected with a toslink cable to spdif in port of Pro, and finally spdif out port of Pro to spdif in of S2 Digi. This way I can play on S2 Digi and record the WiiM Pro output. My measurement was made in Audacity with a procedure described here:
manual.audacityteam.org
Signal sample rate was 96 kHz. Measured latency was around 150 ms:
It's a sum of all the latencies in the mentioned audio path. To have a clear view I've measured a latency of S2 Digi itself in the loopback:
I got around 70 ms.
I think it's safe to say that Pro's spdif in/out latency was 150 ms - 70 ms = 80 ms.
My PC has been connected to the usb port of S2 Digi, then S2 Digi connected with a toslink cable to spdif in port of Pro, and finally spdif out port of Pro to spdif in of S2 Digi. This way I can play on S2 Digi and record the WiiM Pro output. My measurement was made in Audacity with a procedure described here:
Latency Test - Audacity Manual
Signal sample rate was 96 kHz. Measured latency was around 150 ms:
It's a sum of all the latencies in the mentioned audio path. To have a clear view I've measured a latency of S2 Digi itself in the loopback:
I got around 70 ms.
I think it's safe to say that Pro's spdif in/out latency was 150 ms - 70 ms = 80 ms.
- Joined
- Nov 6, 2022
- Messages
- 914
Hi Onlyoneme,I've decided to evaluate a latency over spdif in to spdif out.
My PC has been connected to the usb port of S2 Digi, then S2 Digi connected with a toslink cable to spdif in port of Pro, and finally spdif out port of Pro to spdif in of S2 Digi. This way I can play on S2 Digi and record the WiiM Pro output. My measurement was made in Audacity with a procedure described here:
Latency Test - Audacity Manual
Signal sample rate was 96 kHz. Measured latency was around 150 ms:
View attachment 383
It's a sum of all the latencies in the mentioned audio path. To have a clear view I've measured a latency of S2 Digi itself in the loopback:
View attachment 384
I got around 70 ms.
I think it's safe to say that Pro's spdif in/out latency was 150 ms - 70 ms = 80 ms.
Thank you very much for your tests and the result looks great. You're pretty close. The default latency now is 85 ms and we'll open this setting with more options in our future version if people wants it shorter or longer. Please stay tuned. Thank you!
Can you give us an information on when peq will get release? Thanks!
What about the clock? Does the clock come from incoming spdif signal? Or maybe spdif stream is reclocked to the Pro's clock?
If Mini's clock is still used I will get number of samples equal to that one I get from Mini alone. If it's reclocked I will get Pro's result.
If Mini's clock is still used I will get number of samples equal to that one I get from Mini alone. If it's reclocked I will get Pro's result.
Last edited:
More comprehensive explanation of my findings is here:
audiosciencereview.com
Wiim Pro distortion on spdif input
OK - not sure what you are saying here - you stated "then reclocked": Plus in previous post, you linked a post that states the one hand that the SPDIF (when you couple mini to pro) is reclocked to the pro clock (so must be using ASRC or similar?). But at the same time you say the data is not...
audiosciencereview.com
Let me continue my boring monologue 
My Pro seems to have 0,0007% clock deviation for 96 kHz sample rate. Mini has 0,0019% deviation.
Mini would produce 4156 more samples per hour when connected to the Pro, so to buffer 1 hour discrepancy 44 ms would be enough. I doubt I can capture buffer overrun situation when bit-perfect manner is unable to be maintained...
All above assuming that my calculation is correct and the theory about 2 independent clocks on Pro (one recovered from spdif stream and an internal one) and a FIFO buffering is valid.
My Pro seems to have 0,0007% clock deviation for 96 kHz sample rate. Mini has 0,0019% deviation.
Mini would produce 4156 more samples per hour when connected to the Pro, so to buffer 1 hour discrepancy 44 ms would be enough. I doubt I can capture buffer overrun situation when bit-perfect manner is unable to be maintained...
All above assuming that my calculation is correct and the theory about 2 independent clocks on Pro (one recovered from spdif stream and an internal one) and a FIFO buffering is valid.
Last edited:
Pro has a lower jitter than Mini.
I was comparing a jitter on the ASRC DAC when fed from the Pro powered by a SMPS charger and by a battery pack. I haven't noticed any difference here. I didn't compare with any LPS and it was the Pro, not the Mini though. I wouldn't expect a difference here but I've seen a report somewhere in the net that a PSU change allowed to choose more strict sensitivity setting on the selected DAC for its input.
Do you have any jitter issues?
I don't have the equipment to measure
, even if the jitter is higher in the mini, is it at a level that can be heard with the ear?I really doubt it could be audible. In most cases the DAC will lock to the Mini spdif clock and you will get the digital audio stream unaltered, so no even a chance to hear a difference.I don't have the equipment to measure
Oh the other side a PSU can affect other components in the audio path, but it's unrelated to the Mini itself.
