Welcome to the AudioShark Forums.
Page 4 of 4 FirstFirst 1234
Results 151 to 177 of 177
  1. #151
    Senior Member
    Join Date
    Jul 2014
    Location
    Hong Kong
    Posts
    2,340

    Re: Lumin, Leedh段ng the way

    For Lumin U1 and U1 MINI users:

    I have a beta firmware that may have a minor improvement for those using AES / BNC / coaxial / toslink (i.e. not USB) output especially when using Leedh Processing Volume. PM me if you like to try it.
    Peter Lie
    LUMIN Firmware Lead

  2. #152
    Junior Member
    Join Date
    Dec 2020
    Location
    NB, Canada
    Posts
    2

    Re: Lumin, Leedh段ng the way

    I have a bit of a different setup where my LUMIN D2 XLR痴 go to a DSPeaker anti-mode 2.0 room correction processor and from there, XLR痴 to the inputs on my Simaudio Moon i7 integrated amp. My amp has a feature to bypass its volume control. This would allow me to use the volume control on the LUMIN. However, although the volume control of the preamp is bypassed, the preamp section of the amp is not being bypassed. I知 wondering if I知 even gaining anything in doing this. The volume control of the i7 is described by Simaudio as M-eVOL volume control circuit based on a resistive array configuration with no sonic degradation of the audio signal regardless of the selected volume setting. I suppose it痴 easy to try it to see if there is any noticeable improvement. I知 attaching the manual to my i7 and DSPeaker.
    Attached Files Attached Files

  3. #153
    Senior Member
    Join Date
    Aug 2016
    Location
    Denmark
    Posts
    554

    Re: Lumin, Leedh段ng the way

    Welcome to the forum Mark81
    Flemming

  4. #154
    Junior Member
    Join Date
    Dec 2020
    Location
    NB, Canada
    Posts
    2

    Re: Lumin, Leedh段ng the way

    Quote Originally Posted by FDPDK View Post
    Welcome to the forum Mark81
    Thanks

  5. #155
    Senior Member
    Join Date
    Jul 2014
    Location
    Hong Kong
    Posts
    2,340

    Re: Lumin, Leedh段ng the way

    Quote Originally Posted by Mark81 View Post
    volume control circuit based on a resistive array configuration
    I like the idea of resistive ladder volume control in a preamp (in fact I have one at home, disconnected and literally collecting dust) - they should be better than inexpensive potentiometer found in lower price designs. If I need to purchase another preamp some day, this will be a feature I look for, again. I recall another audio reviewer using Lumin X1 prefers X1 direct to amp rather than going through his preamp with resistive ladder volume control.

    If you do this comparison, please let me know your results.
    Peter Lie
    LUMIN Firmware Lead

  6. #156

    Re: Lumin, Leedh段ng the way

    Does the D2 do full MQA and DSD decoding to the analog output without conversion to PCM with Leedh active similar to the T2 ?

  7. #157
    Senior Member
    Join Date
    Jul 2014
    Location
    Hong Kong
    Posts
    2,340

    Re: Lumin, Leedh段ng the way

    D2: Full MQA is always available to analog output regardless of volume control. For D2, pure DSD is only available with volume control set to off (not applicable to T2 X1). Even so, we have a reviewer strongly preferring the Leedh Processing Volume in a similar case to this.
    Peter Lie
    LUMIN Firmware Lead

  8. #158

    Re: Lumin, Leedh段ng the way

    The Leedh is pretty awesome straight from the Lumin to power amp; I bypass the preamp.

  9. #159
    Senior Member
    Join Date
    Mar 2014
    Location
    USA Michigan
    Posts
    175

    Re: Lumin, Leedh段ng the way

    I am too!
    I actually sold my Ayre Preamp, cables etc. It helped lessen the pain $$$ buying the Lumin X1.

    ozzy

  10. #160

    Re: Lumin, Leedh段ng the way

    Quote Originally Posted by ozzy View Post
    I am too!
    I actually sold my Ayre Preamp, cables etc. It helped lessen the pain $$$ buying the Lumin X1.

    ozzy
    Which amp are you using direct to the X1? Are you going balanced out? Are you using the X1 as both DAC and streamer?

  11. #161
    Member
    Join Date
    Mar 2019
    Location
    La Canada, CA
    Posts
    35

    Re: Lumin, Leedh段ng the way

    Are the benefits of using the X1 (with Leedh) connected directly to a power amp limited to playback using the Lumin app only or would they also extend to playback using Roon via the X1?

  12. #162
    Senior Member
    Join Date
    Jul 2014
    Location
    Hong Kong
    Posts
    2,340

    Re: Lumin, Leedh段ng the way

    Yes Leedh Processing Volume is applicable even if using Roon, and Spotify Connect, etc.
    Peter Lie
    LUMIN Firmware Lead

  13. #163
    Member
    Join Date
    Mar 2019
    Location
    La Canada, CA
    Posts
    35

    Re: Lumin, Leedh段ng the way

    Thank you. So volume control (and limiter) functions available in the Lumin app need to be provided in the Roon app if using it as there is no preamp?

  14. #164
    Senior Member
    Join Date
    Jul 2014
    Location
    Hong Kong
    Posts
    2,340

    Re: Lumin, Leedh段ng the way

    Once both Volume control options are enabled in Lumin app (with optional Max Volume % setting), volume works the same way in Roon app. All these need to be set only one time using Lumin app.
    Peter Lie
    LUMIN Firmware Lead

  15. #165
    Senior Member
    Join Date
    Mar 2014
    Location
    USA Michigan
    Posts
    175

    Re: Lumin, Leedh段ng the way

    RDSChicago,
    I am using the balanced outputs from the Lumin X1 with a 3 meter Shunyata Sigma V2 interconnect to Bob Carver M350's mono blocks.
    I have attached to the Lumin via a USB cable a 8TB Hard drive that has a ton of HR music on it. I also stream from Qoboz.

    ozzy

  16. #166
    Junior Member
    Join Date
    Mar 2021
    Location
    IL
    Posts
    3

    Re: Lumin, Leedh段ng the way

    Here are my subjective test results after playing with Leedh Volume

    Option 1: Connect the Lumin D1 via XLR to my Parasound P5 Pre (Leedh turned off)

    Option 2: Connect the Lumin D1 via RCA cables to my Parasound P5 Pre to Bypass (Leedh turned on)

    I listened to a song and flipped back and forth to the different inputs on my Pre and turning Leedh on and off. The tricky part was trying to match the volumes which is difficult but I gave it my best shot. I will continue the test with more music, but I have to say that I didn't notice a veil lifting moment, I would have to say the song didn't seem that much different to me. Maybe the Leedh had a slight edge, but I know I "wanted" the Leedh to improve my sound, so I probably was trying to convince myself it was better. Is there anything I should try differently in my test? Is having the RCA and XLR cables hooked up in the Lumin concurrently causing any degredation?

  17. #167
    Junior Member
    Join Date
    Apr 2020
    Location
    Fort Wayne
    Posts
    23

    Re: Lumin, Leedh段ng the way

    Tjs77, I had similar results (1) using my Classe sigma SSP in digital bypass mode with Leedh turned off, and (2) setting my Classe to unity gain (still in digital bypass mode) and using the Leedh volume. I had a hard time telling the difference, but if I had to pick one or the other, I would pick Leedh. Like you said, I wanted Leedh to sound better, so maybe there was some bias.

  18. #168

    Re: Lumin, Leedh段ng the way

    Why don稚 you try going directly from the Lumin into your power amp and use the Lumin volume control with Leedh processing. That痴 what I致e been doing with my X1 and it sounds quite good!

  19. #169
    Junior Member
    Join Date
    Apr 2020
    Location
    Fort Wayne
    Posts
    23

    Re: Lumin, Leedh段ng the way

    The Classe Sigma is a prepro and I also use it for my Blu-ray and Lg TV. Although it is a prepro, it is optimized for 2 channel. I use it in digital bypass mode when using the Lumin and it acts as a good analog preamp. It sounds good either way, I just don稚 hear a big difference.
    Last edited by Audiofan57; March 19, 2021 at 07:07 PM. Reason: Typo

  20. #170
    Junior Member
    Join Date
    Apr 2020
    Location
    Fort Wayne
    Posts
    23

    Re: Lumin, Leedh段ng the way

    I have the Sigma connected to the amp via XLR. I guess I could try it directly to the amp using RCA out.

  21. #171
    Junior Member
    Join Date
    Mar 2021
    Location
    IL
    Posts
    3

    Re: Lumin, Leedh段ng the way

    Quote Originally Posted by RDSChicago View Post
    Why don稚 you try going directly from the Lumin into your power amp and use the Lumin volume control with Leedh processing. That痴 what I致e been doing with my X1 and it sounds quite good!
    Good question, and something I tried. I would have to switch the toggle in the back of the amp for the unbalanced and balanced connection depending on if I was using my TV/Vinyl vs the Lumin for that to work. Maybe that can work, but from what I read, the Home Theater bypass *should* do the same thing theoretically as it is supposed to go through none of the circuitry in the pre-amp to process the sound. I will try the direct connection again, and see if there is an audible difference and then see if it is worth flipping the balanced/unbalanced toggle everytime I want to switch from the streamer vs any other media I'd want to listen to.

  22. #172
    Member
    Join Date
    Dec 2019
    Location
    San Diego
    Posts
    48

    Re: Lumin, Leedh段ng the way

    New Lumin user here too. Perhaps I知 thick skulled, but looking for further guidance, even after reading the thread. Any other guidance to folks who have Integrated amps with internal DACs with remotes and Lumin devices. For example, on my Lumin app, I initial took all defaults on anything to do with volume settings - didnt know any better.

    Max Volume % = 100
    溺aster (Circle Icon) Lumin Volume = 100

    Internal DAC = gain setting 0 (can be adjusted +/- 6 db I think)
    Using USB Lumin > Diablo DAC

    When I was listening, I was so surprised how much 杜ore I was hearing to the point where I had suspecting the amp was getting fed a really hot signal. My diablo 120 has a max volume at 45. Even at 25-27, my system was (maybe artificially) extremely loud - So that started me on exploring these Lumin settings.

    I知 mainly a streamer, so I either use Spotify or Tidal/Quboz (probably start some hires downloads to NAS soon) from either our iPhones/iPads, but also use use my 2CH system for movies so the remote control is useful for us to switch inputs and volume. I have a Max Volume Protect controlled on the amp enabled.

    Does it make sense to leave it all settings to 100% on the Lumin app? It is mentioned in the thread to set Max Volume % lower to protect the speakers for a safety? Also mentioned to just use the Lumin app for all things volume?

    I suppose the end goal here is simplicity...and in my mind, I would still revert to the Diablo remote as it is familiar with my family, so that in turn makes me wonder where I should set the Lumin App settings to a 都et it and forget it setting?

    Am i over thinking this? At 100 - it seems the signal is hot? Lowering it (80 on both), the audiophile hysteria in me says I知 not getting it all 祖orrect and I need to measure but man, I知 just a part-time audiophile
    _______________

    TAD ME-1 < REL Carbon Special (Stereo Pair) < Diablo 120 w/DAC Module | Lumin U1 < Torus RM20


  23. #173

    Re: Lumin, Leedh段ng the way

    Here is what Lumin recommends insofar as options for use of Leedh processing:

    LUMIN - Leedh Processing

  24. #174
    Member
    Join Date
    Dec 2019
    Location
    San Diego
    Posts
    48

    Re: Lumin, Leedh段ng the way

    Thanks for the link...
    Based on the scenarios, it looks like I知 #1. If thats so - my little diablo really is ballsy!

    Quote Originally Posted by RDSChicago View Post
    Here is what Lumin recommends insofar as options for use of Leedh processing:

    LUMIN - Leedh Processing
    _______________

    TAD ME-1 < REL Carbon Special (Stereo Pair) < Diablo 120 w/DAC Module | Lumin U1 < Torus RM20


  25. #175
    Senior Member
    Join Date
    Jul 2014
    Location
    Hong Kong
    Posts
    2,340

    Re: Lumin, Leedh段ng the way

    1. If you use the volume of an integrated amp, you should generally set the U1 MINI to disable the Volume Control (such that volume is 100 with max volume % at 100), otherwise the Lumin output to the DAC will no longer be bit perfect. For Lumin digital output (not analog output like those on Lumin X1 or T2) 100 is standard, it is not hot at all. If you find Lumin digital volume 100 being too hot for your DAC, it's your DAC + amp + speakers that is too hot for your desirable listening.

    2. The Max Volume % feature is primarily used in scenario where you bypass the preamp or exclusively use the Lumin app volume instead of the preamp or integrated amp volume control. You can experiment with these but if you still need to use the integrated amp volume for other purposes, then don't. You either exclusively use Lumin app volume, or exclusively use the integrated amp volume, mixing them for different purposes will be error prone.

    3. If your DAC offers a lower gain setting (e.g. -6dB), you should try it. Only if it still sounds too loud to you should you decrease the Lumin volume. Note that if you have volume control enabled in Lumin U1 (MINI), DSD will be converted to PCM before outputting to the DAC.
    Peter Lie
    LUMIN Firmware Lead

  26. #176
    Member
    Join Date
    Dec 2019
    Location
    San Diego
    Posts
    48

    Re: Lumin, Leedh段ng the way

    Hi Peter,
    Thanks for the response and your continued support. This is where I was concerned and you addressed them.

    Quote Originally Posted by wklie View Post
    1. If you use the volume of an integrated amp, you should generally set the U1 MINI to disable the Volume Control (such that volume is 100 with max volume % at 100), otherwise the Lumin output to the DAC will no longer be bit perfect. For Lumin digital output (not analog output like those on Lumin X1 or T2) 100 is standard, it is not hot at all. If you find Lumin digital volume 100 being too hot for your DAC, it's your DAC + amp + speakers that is too hot for your desirable listening.
    That part about be 創o longer bit perfect is what I知 after.
    Thanks for feedback on this. I did have a previous setup, it was an all in one streamer/integrated/dac and I am using the same speakers, cables, etc. But with the Lumin now in place and a new amp, even at low levels, it sounded very overwhelming, and there was no balance or less naturalness in the overall presentation and experience and I was starting to think something was bad in the chain...?

    Quote Originally Posted by wklie View Post
    2. The Max Volume % feature is primarily used in scenario where you bypass the preamp or exclusively use the Lumin app volume instead of the preamp or integrated amp volume control. You can experiment with these but if you still need to use the integrated amp volume for other purposes, then don't. You either exclusively use Lumin app volume, or exclusively use the integrated amp volume, mixing them for different purposes will be error prone.
    Yah I知 going to use the Integrated but by no means calling out the Lumin being at fault here.....but if there is a compromise that I need to be aware of to maintain bit perfect then at least that is brought to the light of things...and I can make a decision on what to adjust, move or replace.

    Quote Originally Posted by wklie View Post
    3. If your DAC offers a lower gain setting (e.g. -6dB), you should try it. Only if it still sounds too loud to you should you decrease the Lumin volume. Note that if you have volume control enabled in Lumin U1 (MINI), DSD will be converted to PCM before outputting to the DAC.
    Funny, you brought this up...I did just that as an experiment. And immediately there was a naturalness to the entire presentation. The terrible is smooth, the bass still intact, the system sounds so balanced now....no hint of a hot 都ignal that I was previously reporting

    My question, is this still bit perfect?
    _______________

    TAD ME-1 < REL Carbon Special (Stereo Pair) < Diablo 120 w/DAC Module | Lumin U1 < Torus RM20


  27. #177
    Senior Member
    Join Date
    Jul 2014
    Location
    Hong Kong
    Posts
    2,340

    Re: Lumin, Leedh段ng the way

    Gain is a function of DAC and amp. You changed the DAC / amp of course the gain will be different. The streamer having bit perfect output cannot make a difference in measured gain. To prove this, you simply need to use a computer (instead of Lumin) and output to the Diablo, making sure you use the appropriate ASIO driver and exclusive mode (bypass the OS mixer) to play the same tracks from JRiver or Audirvana at full volume. You will see that Lumin is not the cause of loudness you're having. Your DAC and amp are (even though I'm sure they are functioning correctly).

    As long as Lumin U1 (MINI) Volume Control is turned Off, you get bit perfect output.

    If the hot signal you referred to was clipping within the DAC, then it makes perfect sense that setting the DAC to -6dB would cure it due to "intersample overs".
    Peter Lie
    LUMIN Firmware Lead

Page 4 of 4 FirstFirst 1234
AudioShark - The Best High End Audio Discussion forum.

AudioShark forum is a leading forum site for High End Audio Discussion, Stereo System Discussion, Home Theater System Discussion, Best Home Stereo System Discussion, Home Theater Installation Discussion etc.

The AudioShark forum was created for sharing the passion of high-end Audio. We have Audiophiles from all over the world participating and sharing their knowledge. From novice to experts, you will find a friendly environment for discussing about High End Audio, Stereo System, Home Theater System, Home Stereo System, Home Theater Installation, Amplifiers, Speakers, Subwoofers, Integrated System, Acoustic treatments & Digital Room Corrections and many more.

At AudioShark, we also have incorporated an exciting Marketplace where members can peruse terrific buys on used gear, as well as meet dealers and discuss the purchase of new gear.

We are as crazy about this hobby as you are! So come on in and join us! Audioshark.org the Friendliest Audio Forum!

Industry Participation Disclosure : The owner and administrator of Audioshark is the owner of Suncoast Audio LLC in Sarasota Florida. Suncoast Audio has a full brick and mortar presence in Sarasota with several great show rooms with many world class brands. More information can be found at http://www.suncoastaudio.com

Audioshark is a community of like minded individuals. Audioshark welcomes participation from all manufacturers and owners of all brands and products. It is our belief that online forums provide a community of like minded audiophiles and music lovers to encourage the growth of this wonderful hobby.

Sincerely,
The Audioshark.org Team


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •