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Thread: Lumin, Leedh’ing the way
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July 25, 2021, 02:47 PM #201
Re: Lumin, Leedh’ing the way
You can either use the volume control from within the Lumin iOS/Android app or get the optional Lumin IR control package.
Neko Audio
Authorized Dealer: AC Infinity, APC, Audeze, Bryston, Devialet, Elite HTS, Fortress Seating, JMF Audio, JVC, Kaleidescape, LG, LUMIN, Magico, Ortofon, RME, Samsung, Soulution, STAX, Trinnov, Vivid Audio, Weiss & more.
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July 25, 2021, 11:27 PM #202
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Re: Lumin, Leedh’ing the way
Thanks for replying. I'm not clear about how would an IR remote work with a transport only component like the U1? Would the Leedh still be functional with the use of such a remote? I'm looking at the U1 connected to a dac with Leedh on in the app. Would an IR remote be applicable in such a setting? Thanks.
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July 26, 2021, 12:54 AM #203
Re: Lumin, Leedh’ing the way
Yes.
The (separately purchased) Lumin IR remote package has a USB receiver to be plugged into the Lumin transport or player.
On receiving a volume command from IR remote / Lumin app / Roon / Tidal app / Spotify app / AirPlay / UPnP app, the Lumin transport or player applies Leedh Processing Volume. If it is a transport for digital output, the volume is done digitally and the output bitstream reflects that. This volume-adjusted bitstream is sent to the DAC.Peter Lie
LUMIN Firmware Lead
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July 26, 2021, 02:15 AM #204
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Re: Lumin, Leedh’ing the way
Thanks for replying.
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August 11, 2021, 04:49 PM #205
Re: Lumin, Leedh’ing the way
Currently using the Leedh Vol control of Lumin going straight into the DAC of Hegel H90 in home theater mode (@unity gain). More vibrant than the amp's vol control! Well done & well implemented dear Lumin!
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August 11, 2021, 11:43 PM #206
Re: Lumin, Leedh’ing the way
By the way, on Roon forum there are multiple Hegel users with Lumin T2.
Peter Lie
LUMIN Firmware Lead
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August 31, 2021, 01:08 AM #207
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Re: Lumin, Leedh’ing the way
Hi
I just purchased X1 with remote control, It’s on the way.
Can I use X1 directly into my power amp which has relatively ( compared to Lumin AMP) low input impedance of 30K ohms.?
But it has reasonably good gain of 28db.
Here are the specs of my amp
KA S180Mk2
Fully balanced dual mono power amplifier. 2x180W (8 Ohm) in class A
Channel separated power supplies from a 680 VA toroidal transformer, 80.000 micro Farad filter bank and four stages of stabilisation
Frequency response DC – 300kHz +0, -3 dB
Signal to noise ratio better than -112 dB
Intermodulation distorsion less than 0,03% at rated power into 8 Ohms
Gain is 28 dB
Pink noise min RMS Power 180/300W into 8/4 Ohms (not recomended for loads under 3 Ohms)
Input impedance 30 kilo Ohm
And my speakers are 8ohm 91db efficiency.
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August 31, 2021, 07:06 AM #208
Re: Lumin, Leedh’ing the way
No problem.
Peter Lie
LUMIN Firmware Lead
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August 31, 2021, 11:20 AM #209
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Re: Lumin, Leedh’ing the way
Thank you
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November 5, 2021, 09:32 PM #210
Re: Lumin, Leedh’ing the way
From Lumin + Leedh Digital Volume control - Digital Sources, DACs, and Computer Audio - StereoNET International
I have a PS Audio BHK Signature preamp which I thought just “wasn’t right”. I placed it on Unity Volume (77) and turn on Leedh Volume on my U1 Mini. The change was so much more significant than I would have thought! When I tried initially running my DAC directly to the power amp, it sounded thin. Now it’s running through a proper preamp with all its input gains and transformers, the sound is full, voices clear and trebles have lost the brittleness. WOW!Peter Lie
LUMIN Firmware Lead
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November 5, 2021, 10:48 PM #211
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Re: Lumin, Leedh’ing the way
I have a MasterSound Spettro preamp. How do I locate the unity gain volume? Thanks.
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November 6, 2021, 12:11 AM #212
Re: Lumin, Leedh’ing the way
If unity gain is not specified in the preamp manual, please turn up the preamp volume, and turn down the Lumin Leedh volume. However, if you also use the preamp for other sources, then you must turn down the preamp volume before you switch to other sources, otherwise there would be a risk.
Peter Lie
LUMIN Firmware Lead
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November 29, 2021, 05:58 PM #213
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Re: Lumin, Leedh’ing the way
For roughly 18 months, I've had my Lumin T2 connected to my McIntosh C2600 preamp via XLR, which was then connected to my McIntosh MC275 amp via XLR. Both have had a small amount of tube rolling to taste.
I was 100% happy and content with the sound I was getting. Thrilled actually.
Over our recent holiday break I experimented a bit...
I pulled the C2600 out, and now have my T2 directly connected to my McIntosh MC275 via XLR.
I turned on the Leedh feature, fiddled a bit with the Max Volume setting (a nice feature all by itself, BTW), and the Lumin app volume control (the Circle).
I tried very hard to have zero expectations; trying to avoid confirmation bias... if anything I was probably looking to justify my preamp's existence.
Going without the preamp resulted in more detail, cleaner highs without affecting the bottom end or the mids. Lifting of the proverbial veil. The difference is astounding, and was immediately evident. I'm literally flabbergasted by the difference.
Adjusting volume via the app is a bit klutzy as I don't always use the Lumin app (Thankyou Tidal Connect).
My Lumin remote kit is on order. The C2600 will likely be for sale as the T2 is my only source.
I'm a little late to this party, but props to the folks from Lumin.
Editorial Feature Request: Quboz Connect, then I can discontinue Tidal and their MQA nonsense.
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December 24, 2021, 10:48 PM #214
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Re: Leedh Processing Volume free upgrade
One question:
I am using Roon with lumin X1. If volume control in Roon is activated (with Leedh activated as well in lumin app), does that mean the volume control in roon using Leedh algorithm?
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December 24, 2021, 11:03 PM #215
Re: Lumin, Leedh’ing the way
Yes, the Lumin volume in Roon is done using Leedh processing. In the next firmware you'd actually see "Leedh" in the Roon signal path.
Peter Lie
LUMIN Firmware Lead
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December 24, 2021, 11:05 PM #216
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Lumin, Leedh’ing the way
Thanks for the clarification. I need to bypass preamp as there is issue with it.
I must say the Leedh is very good!
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May 31, 2022, 03:07 AM #217
Re: Lumin, Leedh’ing the way
Lumin Firmware 15 added analog output balance control to our models with ESS DAC chips (X1 P1 T2 S1). To the best of my knowledge, we are the first manufacturer that makes of use Leedh Processing Volume to provide balance control.
Peter Lie
LUMIN Firmware Lead
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May 31, 2022, 09:05 AM #218
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Re: Lumin, Leedh’ing the way
Thx Peter.
Am I the only who can’t find the setting after upgrading the firmware?
App is up to date as I write this._______________
Main Room: Fleetwood Sound Co. Deville SQ < Bakoon AMP-51R | < Mola Mola Tambaqui < Grimm Audio MU1
>>>BACCH-SP adio
Loft: Apple HomePod Mini
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May 31, 2022, 09:49 AM #219
Re: Lumin, Leedh’ing the way
Android app has already been released. iOS app is waiting for Apple approval.
Peter Lie
LUMIN Firmware Lead
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May 31, 2022, 10:05 AM #220
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Re: Lumin, Leedh’ing the way
That would explain it. Thanks Peter.
_______________
Main Room: Fleetwood Sound Co. Deville SQ < Bakoon AMP-51R | < Mola Mola Tambaqui < Grimm Audio MU1
>>>BACCH-SP adio
Loft: Apple HomePod Mini
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May 31, 2022, 06:28 PM #221
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- San Diego
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Re: Lumin, Leedh’ing the way
Upgraded the iOS app. L/R balance controls are there. X1 just went up a notch on creature comfort capabilities. Thanks Lumin team!
_______________
Main Room: Fleetwood Sound Co. Deville SQ < Bakoon AMP-51R | < Mola Mola Tambaqui < Grimm Audio MU1
>>>BACCH-SP adio
Loft: Apple HomePod Mini
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June 1, 2022, 10:57 AM #222
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June 1, 2022, 12:52 PM #223
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June 1, 2022, 02:11 PM #224
Re: Lumin, Leedh’ing the way
Nice feature. Will come in handy for those times the dog decides to take over the sweet spot.
Thanks Lumin, for continuing to improve your product.Main System
Lumin X1 > Boulder 1161 > Scansonic MB3.5 B
Headphones
Home: HiFiMan Susvara > Schiit Lyr+
Portable: Focal Radiance > AQ Dragonfly Cobalt / Chord Hugo 2
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June 1, 2022, 03:44 PM #225
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Re: Lumin, Leedh’ing the way
So the balance control is only available on units with ESS DAC's?
Not available on units like the U2 mini even though they have Leedh volume processing capability?My System
Acoustic Revive RTP-4
Innuos Pulsar
Lampizator BALTIC4
Cary SLP-05
Pass XA30.5 or
Line Magnetic 845ia
Reference 3A Reflector's
Pr SVS SB3000 Subs
Cables & Tubes "subject to change without notification".
Complete system on battery power/solar
Core Audio Design Rack
DIY bass traps and custom curved diffusors.
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June 1, 2022, 09:25 PM #226
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June 9, 2022, 11:11 AM #227
Re: Lumin, Leedh’ing the way
After reading a bit on the LEEHD feature I decided to try running my D2 (balanced) directly into my Benchmark AHB2 amp. Although I'm only a couple album listens in, it sounds very promising. I just want to clarify my settings as the best way to use it. In settings on the app, I have the volume at 100%, and use the red circle to adjust volume while listening. The indicator in the red circle is anywhere from 45 to 65, depending on how hot the recording is. Is this the optimum way to use it? Thanks.
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June 9, 2022, 11:18 AM #228
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Re: Lumin, Leedh’ing the way
It's completely up to you.
You could also set the max volume to 65 (or 70 to give you a little headroom) and then use the circle to go up to 100%. This gives you slightly more granularity of control.
The sound quality is the same either way, but this way limits the volume to protect your speakers and then gives you 1-100% control up to that limit.
(The main volume control will still allow 100 positions of adjustment, but now the actual volume = main volume × Max Volume %. For example: if the Main Volume is 80, but the Max Volume % is 70, then the actual volume is 80 × 70% = 56.)[Associated with LUMIN]
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June 9, 2022, 11:27 AM #229
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June 9, 2022, 06:09 PM #230
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Re: Lumin, Leedh’ing the way
Peter,
I recently purchased the Lumin remote for my T2. I find the volume up down on the remote very slow. Is there any way to change this?
A few suggestions for updates- Make the volume NUMBER display as large as possible on the Lumin screen. It is almost impossible to read the numbers from a 9-10 foot seating position. Maybe make the numbers as large as the VOL or just delete VOL since everyone knows what the numbers mean and just use the largest numbers possible. Also, if allowable make volume show up on the Lumin display when controlling via Roon or Tidal apps not just the Lumin remote.
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June 22, 2022, 11:50 AM #231
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Re: Lumin, Leedh’ing the way
BUMP
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June 22, 2022, 11:51 AM #232
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Re: Lumin, Leedh’ing the way
..
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June 22, 2022, 10:41 PM #233
Re: Lumin, Leedh’ing the way
The remote volume button repeat rate is tuned in a way so that it'd be safe. We don't want the button being held accidentally to quickly cause potential harm to the speakers.
Peter Lie
LUMIN Firmware Lead
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June 23, 2022, 11:06 AM #234
Re: Lumin, Leedh’ing the way
After a couple weeks listening to the D2 straight into the amp, I'm convinced the volume control is transparent to the music. Yesterday I hooked the D2 back into my preamp and can't hear any difference. Using the remote on the pre is a tad more convenient, but not sure I couldn't get used to the control via ipad.
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September 19, 2022, 11:32 PM #235
Re: Lumin, Leedh’ing the way
This is one of the most in-depth comparison of ESS DAC chip volume against Lumin enhanced implementation of Leedh Processing Volume to analog output.
In The Absolute Sound issue 330 (Sept 2022) review of Lumin P1:
It is easy to turn Leedh on and off in the app to compare it to a conventional digital-domain volume control, as well as to no volume control. When the volume is set at “100” or the output level is set to “fixed,” both Leedh and the conventional volume controls are bypassed.
When I applied 30dB of attenuation with the conventional volume control, an entire level of low-level detail was shaved off. There was simply less musical information there, from quiet sounds at the back of the mix to the inner detail of instrumental timbre. Percussion instruments sounded like nothing more than transient clicks, the mechanism by which the sound was created was lost. On Norah Jones’ debut album, her voice was harder and a bit coarse with the conventional volume control, and was overlaid with a roughness and stridency, particularly on louder passage in the higher end of her register. When I switched to the same amount of attenuation with Leedh, the sound became more liquid and refined overall, with the low-level detail restored. The bite on the leading edge of the guitar was gone, replaced by a more natural rendering of the instrument’s attacks and dynamics. With Leedh, Jones’ voice became more immediate and palpable, with a human quality missing from the mechanical rendering I heard with conventional digital-domain attenuation. Finally, unlike the conventional volume control that flattened the soundstage and reduced the sense of air, Leedh maintained the presentation’s three-dimensionality and bloom.
I then compared 30dB of Leedh attenuation with no attenuation by making up the volume difference with the CH Precision L10 preamplifier. To my surprise, I heard no degradation with Leedh; the two presentations sounded identical (the L10 was in the signal path for both presentations). It was clearly obvious that this amount of attenuation in a conventional digital volume control was a non-starter sonically, and that Leedh is sonically “lossless,” as the company claims. This is, to say the least, a significant achievement.
Peter Lie
LUMIN Firmware Lead
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July 14, 2023, 11:28 PM #236
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Re: Lumin, Leedh’ing the way
Quick question and perhaps directly to Peter. Currently I am feeding the Lumin X1 directly into the Westminsterlab Rei and using Leedh for volume control. The geometry of my room is creating a boom at the lower frequencies and I am thinking of introducing an active crossover (Bryston 10B-Sub) in between the X1 and the Rei. I am wondering if this is even possible to do and also concerned if there is any risk involved? If anyone else has been using an active crossover before the amp and can advise accordingly then I will be very grateful. I am not thinking of adding a pre-amp.
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July 15, 2023, 12:57 AM #237
Re: Lumin, Leedh’ing the way
I suggest you ask WestminsterLab first.
Peter Lie
LUMIN Firmware Lead
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July 16, 2023, 04:29 PM #238
Re: Lumin, Leedh’ing the way
That's generally how the 10B-Sub would be inserted into the chain: after volume control and before your subwoofer(s) and stereo amplifier. I've set it up this way before. The input impedance on the Rei is listed at a healthy 200 kOhm. The 10B input impedance is stated as 20 kOhm but was measured higher by Stereophile, and is an active input stage so I expect it will be a flat input impedance and fine with the X1's output transformers.
Neko Audio
Authorized Dealer: AC Infinity, APC, Audeze, Bryston, Devialet, Elite HTS, Fortress Seating, JMF Audio, JVC, Kaleidescape, LG, LUMIN, Magico, Ortofon, RME, Samsung, Soulution, STAX, Trinnov, Vivid Audio, Weiss & more.
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