Further Thoughts Re:
The Alesis Masterlink 9600
The Owner’s Manual for the 9600 is fully fifty pages
long. Okay, the print is big and there are plenty of helpful diagrams to
speed along the learning process. So, it’s not fifty pages of small print.
But for the individual who almost always flings the owner’s manual into an
obscure place the moment he sees it, not knowing where to start is an
intimidating thing. For the uninitiated such as myself, the recording
process appeared so foreign that I didn’t know if I’d ever be able to
make a compilation disc with it. As it turned out, I was able to proceed in
stages; making crude LP to CD copies at first, then quickly progressing to
fade-ins, fade-outs and level adjustments. I can’t say that one needs to
do a lot more than be able to make those basic adjustments in order to
record a really fine compilation disc. Then again, this machine so far
outstripped my abilities to use it that I shouldn’t really make
assumptions regarding the capabilities of others. I know when I’m
outclassed.
In actuality, the Alesis can do much more than I will
ever fully utilize; things wasted in the hands of an amateur such as myself.
It’s hard to know where to start. But let’s talk anyway.
Editing comes in two general modes, what I call:
permanent and non-permanent edits. The non-permanent edits are those
referred to above. Fades and level adjustments can be made over and over as
none of the actual digital information is destroyed in making those moves.
Permanent edits, on the other hand, are dsp modifications to the actual
digital data stream, and once they are implemented, the original digital
data is either permanently changed or destroyed… there’s no going back.
For example, cutting out a dead spot to shorten the time between cuts is
permanent. There are other edits that are equally permanent, though I must
admit to not using them… I’m chicken. The thought of making a mistake
that I can’t fix has been enough to keep me away from certain edits and
corrections. I’ll leave that to the pros. But if you can get past the
paranoia, there’s very little that can’t be done to the digital
bitstream by the Alesis if you know what you are doing. Which may be the
reason why so many professionals have used the machine with wonderful
results. I can basically guarantee that some of the CDs in your collection
were mastered on a 9600. So, you’ve already heard this machine without
even knowing it.
The first thing the prospective user needs to know about
the 9600 is that it utilizes an internal hard drive as a reservoir for the
raw unedited music. That’s where the music goes first. It’s on the hard
drive that all edits take place and it’s what makes the 9600 so flexible.
Each collection of songs on the hard drive is called a file, and the unit
has the capability of creating 99 files. The real limitation arising from
the use of a hard drive for music storage is the size of the hard drive
itself. In the case of the standard 9600 a 40 gb hard drive is used. Which,
by today’s computer standards isn’t very large. The real issue,
therefore, is the amount of recording time one has based on the size of the
hard drive. The time metric also depends on the resolution level at which
the music is committed to the hard drive. At the lowest level of resolution
(16/44) times upward of 50 hours can be stored for editing. An increase in
recording resolution to 24/88 drops recording time to around 17 hours. At
24/96 it drops even more. Of course, instead of filling the hard drive up,
one can burn the material onto a CD and then delete that material from the
hard drive, thereby freeing up more space. Though I haven’t gone there,
word has it that hitting the zero time mark, or getting too close to it, can
result in loss of everything on the hard drive - a bad thing.
Lastly, with the Alesis one can record a "super
CD" of information recorded for playback at a true 24/96. That’s
Hi-Rez by anyone’s definition, but there is a large drawback; it records
the information in a format that can only be used by computers (or another
Alesis). Which, of course, severely limits the use and utility of such a
recording if you want to share it with others. I would have greatly
preferred the ability to use the DVD-A format as some machines are starting
to use today. 24/96 is the norm there and most audiophiles have some means
by which to playback DVD-A, even if it’s merely through a DVD player.
I did most of my LP to CD (LPCDR) recording at the 24
bit, 88.2 sampling frequency. It has always been my understanding that while
24 bits are good for low noise specifications (even when later downsampled),
that a 88.2 kHz sampling rate was superior to a 96 kHz sampling rate due to
the math involved; 88.2 being a clean multiple of the 44.1 standard with 96
being an uneven multiple of the same. Made sense to me. So that’s the way
I made most of my recordings, not really challenging the reasoning of the
so-called experts other than a few test recordings that were inconclusive.
Then I started to think (ouch). What are computers best at? Pure number
calculations. Why should downsampling from 96 kHz to 44.1 kHz be all that
difficult for a computer? Do they really need multiples of two to sound
best? I think not! Take a hand held calculator and divide 96 by 44.1. Did it
have to stop and think about the answer? Nope, the answer came out
immediately. Yes, it used some decimal points and the answer is an
approximation, but by only three ten millionths… Think you can hear a few
ten millionths? I’ve now experimented further, and I think I like the 96
kHz sampling frequency over the 88.2. That I can hear, or at least I think I
can.
I’ve never owned a piece of audio equipment so
complicated. As raw to this as I am, there was still nothing that couldn’t
be accomplished after reading the manual or sending an e-mail directly to
Alesis. A few things aren’t covered in the manual. When I couldn’t
figure out what to do by reading the book, a short e-mail to Alesis
explaining my dilemma resulted in a prompt response from a real human being.
There were a few times when I dug a digital hole that I felt couldn’t have
been my fault, and oftentimes I’m quick to conclude that my frustration is
the result of a flaw in the component I’m working with. In the case of the
9600, however, as complicated as it was, the machine was never wrong. It
never tripped up, never made a mistake. Having so many functions available
via a few key buttons is in some ways mind boggling - and yet everything
associated with the Alesis worked exactly as advertised - exactly! I’m
very impressed.
Even with a machine as complete as the Alesis, there were
things I could do as an audiophile in order to maximize its performance.
Getting the most out of any component starts with the AC, and as such, a
check of AC polarity was first on my "tweaking checklist." The
chassis to ground potential with the AC plug oriented normally resulted in a
voltage reading of 4.2 volts compared to ground. With the polarity of the
plug reversed I got a voltage reading of 4.09 volts. That’s a small
difference in voltage, insignificant enough that under most conditions I
wouldn’t worry about it. (When the readings are so close, it usually
indicates that there are more than two transformers inside; one wired right
and one wired wrong.) I reversed it anyway, though listening tests revealed
little or no difference between either polarity. When writing an article
about an important product, everything must be right… even the little
things.
My second move to optimize sound was to choose the right
power cord as well as the right power line conditioner. The choice of a
power cord was a pretty easy one - the LessLoss. From there I chose the APC
S15 UPS power line conditioner. With each of its 12 powered outlets being
isolated from the others, I knew the Alesis would be getting clean power and
that the Alesis would not be contaminating other componentry.*
Vibrations are always a concern with components having
moving parts. There are as many ways of handling vibrations as there are
opinions on the subject. My approach was a combination of chassis damping as
well as chassis grounding. Under the 9600 I installed a Bright Star Audio
Little Rock, a means of mass loading the unit while creating a chassis to
mechanical ground diode effect, i.e., air induced vibrations impacting the
player being sunk into the Bright Star. On top of the 9600 I placed six
Walker Audio chassis weights. These weights on top of the 9600 served to not
only mass load the chassis but their weight also served to couple the 9600
to the Bright Star base. Between the Walker weights and the actual chassis
top of the 9600, I placed little round sponges so as not to scratch or mark
the player.
In order to monitor the music going to the Alesis while
recording, I hooked up the output of the phono stage to the preamp I was
using (a Wyetech Jade or Herron ). Then, from the tape out of the preamp I
ran an interconnect back to the Alesis as an analog "in."
Interconnects used were either from RWA or Skywire. I played with the idea
of running the phono output directly to the Alesis and bypassing the preamp
tape out all together. One less set of interconnects to color the sound and
I could monitor my signal via the headphone jack on the Alesis. It wasn’t
worth it. First of all, my headphones stunk, and secondly, going directly
from the phono to the recorder resulted in a weird low level whirring sound
that I could not eliminate. Why the whirring was present when going direct,
but absent when going first to the preamp and then to the recorder I have
not figured out. But it’s not because the preamp was acting as some sort
of buffer between the phono and the Alesis. The "tape out" is a
direct connect that goes through no buffering or amplification; not even a
volume pot. I know that this has happened to other audiophiles making LP to
CD recordings; so I’m not alone in this regard. I’ll work on this…
Before going into the sound of the Alesis, I want to
explain why the machine is a valuable reviewing tool. This is where the
value of the hard drive comes to the fore and starts making a lot of sense.
In the phono cartridge survey that I’m presently working on, the Alesis
was invaluable. During the process of auditioning the four new cartridges I
was able to make recordings of each under different loading conditions and
alignments. Going back and forth with the recorded materials allowed me to
compare a cartridge loaded at 100 Ohms vs. 47,000 Ohms in a matter of
seconds. By making recordings with the Alesis of the various cartridges I
was also able to compare the sounds of the different carts with the push of
the >| button on a remote. I could compare A to B almost instantaneously.
I know what you are thinking. I know, because I’ve
thought the same myself. How can one compare and make fine determinations of
analog sound via a (comparatively) low rez digital playback system?
Interestingly, while some of the finer aspects of analog playback are indeed
obscured by digitizing it and then playing it back, the essence of a
cartridge’s performance is maintained and comes through with shocking
clarity. Same for phono stages, tonearms, tables etc. Listen for it, and you’ll
hear it… especially if you heard it before it was dedicated to the digits.
Actually, I believe that I can hear much, much more from a digitized
recording of an LP now than when I was dedicating the same materials to my
reel-to-reel years ago. The digital recording process is sufficiently
revealing that I, and a small group of friends, are able to record LPs
played on our respective "analog rigs", send them to each other
and be able to critique the performance of cartridges, phono sections, arms
and tables. And the comments are generally dead on critically.**
Sonics
I wish that I could tell you that music dedicated to the
hard drive of the Alesis Masterlink 9600 was indistinguishable from the
original. It would be even better if I could say that a CD made from the
hard drive of the Alesis was indistinguishable from the analog original -
but I can’t. I can’t say it for digital to digital recordings or analog
to digital recordings as there always seems to be a small difference created
by the insertion of the 9600; be it digital or analog.
The finest duplicate recordings I could make were from
CDs to hard drive, then back to CD. Musical compilations made from CDs were
nearly perfect with the 9600 when I used premium CD blanks for the final
product. For this purpose, my favorite blanks are a "black" blank
from Memorex and a gold blank from PNY. These things are getting harder and
harder to find, but the effort to get them is definitely worth it. Digital
to digital copies were very true to the originals, less some space and air
around the instruments. But it was minor, very minor.
Using the analog to digital converters to make CDs from
LP was a little more challenging. For some reason, some LPs that sounded
great from the table did not sound so great after rendered to the hard
drive. If that wasn’t confounding enough, there were occasions when LPs
that sounded congested or muffled when listening to them directly, came off
the hard drive sounding better than before. I fear that the reasons for this
phenomena will not reveal themselves easily and that only time and attention
to detail will establish a pattern from which a conclusion can be drawn. But
it’s fun trying to guess how an LP will sound once committed to digital
and burned as a CD.
As a whole, LPs to CDs lose some of their organic
qualities. Textures are subtly reduced and with some recordings the air in
the lower mids and upper bass will dry up some, while leaving the deep bass
untouched. I have observed this latter quality (the drying) in LPCDRs made
by machines other than the Alesis, so it seems to be something pandemic to
the process… but not always.
With the Alesis, the very rhythm of a recording comes
through very well, as do small details. Tempos and relationships to scale
are basically undisturbed by the D to A process although front to back
clarity can in some instances be compressed to varying degrees. But, again,
the remarkable thing about making an LPCDR is how much can be revealed and
understood regarding the original recording. Enough information is saved,
stored and refunded that the mind seems more than capable of filling in the
blanks after the process is complete to make for a super enjoyable listening
experience.
A note of caution is in order. Do not, I repeat, DO NOT
engage the record button on the Alesis while your preamp’s selector switch
is on CD, or whatever position you use on the selector switch to play back
music off of the Alesis. To do so will mean a high level feedback whine that
could be damaging to your system if the volume is up very high. So far I
haven’t broken anything, though it has nearly sent me through the roof on
a few occasions where I made that very mistake with the volume control set
relatively high.
So, there you have it; my experience with the Alesis.
What I would like to do is make available to readers copies of the LPCDRs
that I’ve made of cartridges, phono sections, alignments, tonearms, etc.
The problem that I run into is of the music. I assume that most of the music
I listen to is copyrighted, and while I use the music that I do for
experimental and demonstration purposes, would that be a violation of
copyright? I don’t know. If any of you do, I’d like to hear from you.
* Subsequent to putting this article together I received
two different AC line conditioners from LessLoss. I’m presently
auditioning the LessLoss units and can say with certainty that are
competitive with the APC and the Monarchy isolation transformer - most
likely better..
** For example, I sent an LPCDR made with the
Transfiguration Phoenix cartridge to these guys and they basically nailed
the sound of the Phoenix on the Clearaudio table, Origin Live arm and Herron
VTPH-2 phono stage. Most of the disagreements were of degree rather than
character. I was surprised at first at how accurately the sonics were
diagnosed; now nothing surprises me…