I have now had the M-Scaler in my system for about ten days. Here are some observations.
Overall Gestalt
The single biggest takeaway for me is that music is more composed and calm. Music does not feel as hyped as before; there are not as many moments that show some hint of harshness; there are fewer sharp edges. In a word, music is more natural. Some would say this is a darker sound and I wouldn’t disagree. But it is not darker at the expense of detail or resolution. Frankly, this greater sense of composure ran counter to my expectations, which centered on things like clarity, detail, and soundstage. I didn't know quite what to make of the M-Scaler during my first hour or two of listening because in some ways it seemed like some drama was missing. The more I listened, the more I realized that I was more easily drawn into the music and a greater emotional connection was formed. There was a subjective sense that music had slowed down.
This is pure speculation on my part, but my guess is that HMS is easing the difficulty my ear/brain may have processing music; listening is both more relaxing and more involving.
It is important to put this in context: my current system (see below) is the least forgiving and most transparent that I have had over the years (though I have some friends with more resolving and less forgiving systems). The speakers are not laid back; rather, they are dynamic, nimble, and fully capable of revealing harshness, glare, and poor recording quality. So this newfound sense of composure and calm is particularly beneficial in the context of my system.
Separation of Musical Lines
This is probably the second biggest revelation for me: the ability of the M-Scaler to unravel dense musical passages and allow one to follow disparate musical lines. There is a very evenhanded treatment of different strands in the music that allows one to hear and focus on multiple strands of music simultaneously rather than forcing the focus on a particular instrument or voice. This enhanced ability to follow stacked elements of the music or criss-crossing musical lines is a chief virtue of the HMS.
In his excellent review of the HMS on audiophilelifestyle.com,
@austinpop captured this well when he said:
"The best way I can describe it is temporal coherence. There is just something “right” about the sound in terms of its timing. Take dense orchestral music like the Mahler. Normally, with music like that when different instruments come to the foreground in terms of volume, one’s ear is drawn to them, and the others recede from attention. It’s akin to surfing - riding on the crest of each wave. Forgive the mangled metaphor - I don’t surf! What I found with the HMS is that as an instrument receded from its crest, it remained perfectly easy to follow. As a result, I found myself able to keep my attention on what instruments were doing off their peaks. On dense music, this is a revelation! It draws you so much deeper into the piece, both intellectually and emotionally."
See
https://audiophilestyle.com/ca/revi...ord-electronics-hugo-m-scaler-hugo-tt-2-r781/
This ability to follow musical lines not only draws you into the music, it allows you to appreciate and understand how it is actually put together.
High and Low Volumes
On most tunes I am now able to turn up the volume by several decibels with no hint of strain, compression, or harshness. Conversely, the system sounds very good at low volumes, allowing one to hear a coherent whole without missing pieces. Since my listening room is our living room, this flexibility is important to me.
Human Voice
Wow. Very dimensional, very natural. Little inflections are heard and understood.
Bass
The M-Scaler does not produce more (or less) bass than I was hearing before. Rather, it is cleaner, more intelligible, tuneful, and easy-to-follow bass. Bass also seems more locked in with the rest of the music. If bass is important to a given tune and recorded well, you are in for a treat.
Soundstage/Depth
One of the major strengths of my current system is a large soundstage with excellent imaging. I wouldn't necessarily say that the HMS has produced a bigger soundstage. I do hear better layering front to back. I also "see" images that are more defined and that seem to have greater cushions of air around them, without fuzz on the edges. For example, on a recording of two pianos, it is easier to hear the two pianos as distinct instruments played by distinct musicians, each occupying their own space. On a musical level, this allows one to appreciate the interplay between the musicians and grasp more of their intent. Related to the issues of soundstage and depth, there is significantly greater recovery of ambience and air in recordings that have it.
Impact on Redbook Files
I've never been a big believer in the importance of format; it’s music first, then recording quality; with format last. I am now even less of an advocate for the importance of (or differences among) hi-rez formats. HMS tends to level the field, unlocking hidden beauty in your Redbook files. Really good recordings become stupendously good. As others have noted, however, it is not a miracle worker. The impact of HMS on Redbook varies widely depending on recording quality.
Setup Issues
Chord should really insert some additional pages in the HMS owner’s manual that spell out exactly how one should connect the M-Scaler to DAVE, Hugo2, and Qutest. Currently, the manual only deals with Hugo TT2. I was up and running quickly, thanks to some helpful comments by folks in this thread.
An Observation Regarding Power and the HMS
I am unlikely to try different power supplies on the HMS, as I have read enough comments, from enough experienced people, to conclude that it is difficult to better the supplied power supply without going to a great deal of expense. But I did try one little experiment.
[Side note: I replaced the stock power cord that comes with the HMS with a Shunyata Venom power cord. Pretty cheap upgrade at $95. I have not compared the stock power cord with the Shunyata.]
Initially, I plugged the Shunyata power cord into a fairly cheap Wireworld power strip. This is where I have plugged in my other non-analog power supplies that power various components in my digital chain (Uptone Audio LPS 1s). This power strip is plugged into a different circuit than my dedicated audio circuits. This practice follows the advice of Shunyata, which is to separate purely digital components (like the HMS) from anything that contains an analog circuit, both physically (to the extent possible) and in terms of power circuits.
Sometimes the received wisdom needs to be tested, however, and so I plugged the Shunyata cord into an available outlet on my Audience aR6 TSSOX power conditioner. This particular outlet was designed for digital components (like a DAC), although I prefer to plug DAVE into one of the outlets normally reserved for amps (and I have my amp plugged into the wall).
There was a clear and unambiguous change for the better using the power conditioner to get power to the HMS. What stood out was that bass was more intelligible and propulsive, and backgrounds seemed blacker. There was another step forward in reducing edginess and a step up in musical engagement. The Audience conditioner, combined with its expensive Audience power cord to the wall, and my dedicated 20 amp circuits using 10 gauge wire all combined to produce this result.
BNC Cables
Note that my experience so far has been with the stock cables. Eventually, I plan to audition two or three brands of BNC cables and see how much of a difference they make.
Comparisons with Vinyl
I have a good vinyl setup and it's been an interesting exercise to compare good vinyl records with the same tunes played through HMS. Not surprisingly, the results vary widely. For those who believe HMS has made vinyl obsolete, I'm sorry to report that is not the case. Vinyl is still king with select recordings. Example: any tune on Joni Mitchell's Blue album (the reissue on Rhino). This record has that "breath of life" that is immediately recognizable within 10 seconds. It's mostly about tone and texture. The dulcimer on "California" and "A Case of You" has much more texture and woody resonance than with any digital version (that includes a Tidal 24/192 MQA version (unfolded by Roon to 24/96); a Qobuz 24/96 version; and my own rip of a Redbook CD). By comparison, the dulcimer through my digital chain sounds a little plasticky, lifeless, and grey. Joni's voice is simply more human, more tangible, and more real on vinyl, and my analog system throws a considerably bigger image. The comparison is not close at all.
On the other hand, yesterday a friend brought over Radiohead's "In Rainbows" album and the Reference Recordings album "Exotic Dances from the Opera." Neither vinyl album could hold a candle to digital playback of the same tunes through HMS.
I will say that the variation in the quality of vinyl playback is much greater -- from really bad to really great -- than what I typically hear through digital with HMS, which tends to vary from OK to really great.
My System
To help put my observations in context, my system consists of:
Devore Gibbon X loudspeakers
HiFiMan HE1000 headphones
Chord DAVE
Chord Hugo M-Scaler
Roon/Tidal/Qobuz running off SD card
Mac Mini modified by Uptone Audio in bridged mode serving as Roon Core server, powered by Uptone Audio JS-2 power supply
Paul Pang ethernet switch with TXCO clock powered by Jameco LPS
SOtM dCBL-Cat7 Ethernet cables
Blue Jeans Cable 6a ethernet
SOtM sMS-200 Ultra powered by Uptone Audio LPS-1 power supply with custom Zenwave UPOCC copper cable
Uptone Audio Iso Regen powered by Uptone Audio LPS-1 power supply and Ghent Audio cable
SOtM txUSB Ultra powered by Uptone Audio LPS-1 power supply with custom Zenwave UPOCC copper cable
TW Acustic Raven turntable and integral phono cable
TW Acustic Raven 10.5 tonearm
Miyajima Shilabe cart
Zanden/TW Acustic record mat
Crayon CFA 1.2 integrated amp with Synergistic Research Blue Fuses
Crayon CPH-P phono stage with dedicated Paul Hynes SR5 DR48 power supply with Synergistic Research Blue Fuse
Daedalus/WyWires speaker cable
High Fidelity CT-1 Enhanced interconnect
WyWires Gold interconnect
Phasure Lush USB cable
Phasure Lush^2 USB cable
Audience AU24 SE USB cable
Audience aR6 TSSOX power conditioner
Shunyata Alpha HC power cord powering amplifier direct-to-wall
Shunyata Alpha HC power cord powering Chord DAVE
selection of Audience AU24 SE and Audience PowerChord power cords
Two 20 amp dedicated circuits with 10-gauge wire and FIM 888 AC outlets
Stillpoints Ultra SS and Ultra Mini under most components including speakers
Finite Elemente rack with Cerabase footers
Equipment Vibration Protectors from A/V Roomservice under other components
Finite Elemente Ceraballs under other components
Custom wall-mounted TT rack
Acoustic Revive Schumann resonator powered by Jameco LPS
Stillpoints Aperture acoustic room treatment (2)
A/V Roomservice acoustic room treatment (4)
Acustica Applicata Diffusion Absorption Audio Device
ZSleeves
DIY ultrasonic record cleaner/VPI 16.5 record cleaner
High Fidelity Cables MC 0.5 Wave Guide
High Fidelity Cables Magnetic Adapters