Lumin

It seems to be a sharp click/pop electronic noise. After further testing it seems to occur when changing formats while upsampling pcm to dsd. Switching formats from a song in 44.1 to dsd64 or 96 to 44.1 makes the noise. Switching tracks of the same format do not make noise.
 
For experiment, please avoid the 96kHz music or 96kHz->DSD upsampling. Please set 44.1kHz to upsample to DSD64, and focus on switching tracks among 44.1kHz upsample to DSD64, Tidal, and DSD64.

(48/96/192kHz upsampling to DSD64 actually results in DSD64+ instead of the standard DSD64 upsampled from 44.1/88.2/176.4kHz. To avoid confusion in the experiment please avoid 48/96/192kHz music.)
 
Now let's try:
1. Set 44.1kHz to upsample to DSD64, keep 96kHz as Native (PCM)
a. 44.1kHz -> 96kHz
b. 96kHz -> 44.1kHz
c. 96kHz -> DSD64
d. DSD64 -> 96kHz

2. Set both 44.1kHz and 96KHz to upsample to DSD64
Repeat a-d.

3. Set 96kHz to upsample to DSD64, keep 44.1kHz as Native (PCM)
Repeat a-d.
 
I can't do number 1 or 3 since my do has 2 engines pcm and dsd they don't run simultaneously. I did however try 2 and the noise was back anytime dsd to dsd+ switching takes place. dsd+ to dsd+ = no noise. dsd(pcm to dsd/tidal/dsd)switching = no noise.
 
RichardA1 said:
noise was back anytime dsd to dsd+ switching takes place. dsd+ to dsd+ = no noise. dsd(pcm to dsd/tidal/dsd)switching = no noise.
Click to expand...

This is in line with what I guessed. You may consider talking to your DAC manufacturer about this.

DSD64 = 2.822MHz
DSD64+ = 3.072MHz (as upsampled from 48/96/192kHz PCM to DSD64+ from Lumin U1).
 
I have a general question about the Lumin App in concert with any of the Lumin appliances and Tidal....

When streaming Tidal audio via cell phone or tablet running the Lumin app as the controller, is there a constant cellular data click-charge for data usage when listening?

How does the Lumin appliance + Lumin app + Tidal work with cell data use?

I realize that the audio is streamed across my ISP internet connection, but does the cellular data use for the app increase with streaming use proportional to time listening?
 
MikeCh said:
I realize that the audio is streamed across my ISP internet connection, but does the cellular data use for the app increase with streaming use proportional to time listening?
Click to expand...

The short answer is no, unless you are using a very unusual setup (such as using 3G or LTE cellular data modem for your home router internet connection.)

In a normal setup, your router is connected to the ISP internet, and your cell phone or tablet has to be switched to router WiFi in order to see and control the Lumin player. So your router WiFi and the ISP internet connection is used.

To be more safe, you can turn off iOS WiFi Assist (which may use your cellular data even if you think you are using WiFi), and/or explicitly disable Mobile Data for the Lumin app and all other music streaming apps (if you only use them to AirPlay to Lumin at home).
 
Peter - You provide an exceptional level of support in a very timely manner on this forum. Some other companies could use your customer support as an example to emulate, very nice job!
 
wklie said:
The short answer is no, unless you are using a very unusual setup (such as using 3G or LTE cellular data modem for your home router internet connection.)

In a normal setup, your router is connected to the ISP internet, and your cell phone or tablet has to be switched to router WiFi in order to see and control the Lumin player. So your router WiFi and the ISP internet connection is used.

To be more safe, you can turn off iOS WiFi Assist (which may use your cellular data even if you think you are using WiFi), and/or explicitly disable Mobile Data for the Lumin app and all other music streaming apps (if you only use them to AirPlay to Lumin at home).
Click to expand...



Thank you for the clarification, Peter.

And Bill is correct, we REALLY appreciate the level of customer service that you provide here on Audioshark. Thanks again.
 
Bump on the question of being able to search by file type on the Lumin app. Is there a way to do this presently? Is this a feature that is being considered in the future?


Odyssey said:
Does anybody know how to search by file type in the Lumin app?

For example, if I only wanted to hear DSD files, how do I search for those files under the Lumin App? I know Aurender lets you search by Redbook, high res, and DSD.

Comes in pretty handy when you are building playlists for the Lampi. With the Lampi you have to manually switch back and forth between PCM and DSD.

If you can't that would be a nice firmware update. Hint, hint.
Click to expand...
 
Peter - In addition to the question asked above about whether the Lumin app allows a search by file type (i.e. Redbook, Hi-Res PCM, or DSD) I have an additional question. I've read that using the Lumin L1 for storage with the U1 (as opposed to an external USB hard drive or LAN file access) offers audibly superior performance. I wonder why this is so, since wouldn't the highly accurate clocks and other circuitry in the U1 re-clock and buffer the data to make the storage source insignificant? Apparently that's not the case, but I'd like your thoughts on what makes the L1 superior. Thanks in advance for your support.
 
Odyssey said:
Bump on the question of being able to search by file type on the Lumin app. Is there a way to do this presently? Is this a feature that is being considered in the future?
Click to expand...

I'll talk to our product manager for this again when I see him. Anyway, this is probably not an easy problem to solve, because the app does not "see" the file type directly. The app purely depends on the music library server - MinimServer for most Lumin users - to embed such information into the music metadata information.

Things become even further complicated when we have FLAC files that contain DSD-over-PCM.

A workaround, although probably not practical, is to put the music files into folders of different file formats, then browse by folder view.
 
audio.bill said:
Lumin L1 for storage with the U1 (as opposed to an external USB hard drive or LAN file access) offers audibly superior performance. I wonder why this is so, since wouldn't the highly accurate clocks and other circuitry in the U1 re-clock and buffer the data to make the storage source insignificant?
Click to expand...

You are correct that Lumin players have their own ultra-low phase-noise clocks and buffer the music data.

It's fairly well established that network is superior to USB for audio quality - a manufacturer recently introduced a product that reduces the electrical noise in USB by converting it to network. (By the way, it is our position that a Lumin player with analogue output is the best solution. U1 is only meant for users who really want to use their own USB DAC.)

As for why L1 is reported by users (but not advertised) to deliver better audio than typical NAS, I wonder about that, too. :blush: Not being a hardware guy, my theory is that the fanless L1 hardware design, HDD, power supply and single-purpose firmware that puts minimal stress on the CPU, generate less electrical noise than typical NAS.
 
Any chance of the S-1 getting preamp/volume capabilities in the future ?? That would really open up the market as a combo piece of gear. Would sure love to hear an S-1 tapped directly into my amplifers !!!
 
JDLaudio said:
Any chance of the S-1 getting preamp/volume capabilities in the future ?? That would really open up the market as a combo piece of gear. Would sure love to hear an S-1 tapped directly into my amplifers !!!
Click to expand...

All Lumin player or transport models have volume control. Although S1 / A1 / T1 / D1 users are recommended to keep the volume at 100%, you may make use of the volume in a setup without preamp. In this setup, disable the digital output - this way the volume control will be done by the DAC instead of the processor.
 
wklie said:
All Lumin player or transport models have volume control. Although S1 / A1 / T1 / D1 users are recommended to keep the volume at 100%, you may make use of the volume in a setup without preamp. In this setup, disable the digital output - this way the volume control will be done by the DAC instead of the processor.
Click to expand...

I think I ask Mike about this before, and he said it wasn't recommended......or there was a loss of sound quality ?? Is SQ affected if the volume is run by the dac, as you suggest ?? THANKS for the replies !!!
 
I know that there are Lumin users who use the built-in volume control satisfactorily, although we recommend keeping the volume at 100%.

Lumin S1 has the same 32-bit digital volume (when digital output is turned off) as some ESS9018-based DAC products that advertise a built-in preamp. On this basis, the quality of digital volume should be very similar between S1 and those products.

So perhaps you can try it with and without a pre-amp and see which setup you prefer. When not using a pre-amp, try both the XLR and RCA outputs of Lumin (but not connecting them at the same time) - they have different voltage levels as per industry standard.

Here's ESS presentation on why its digital volume is really good:
http://www.esstech.com/files/3014/4095/4308/digital-vs-analog-volume-control.pdf
 
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