For the second time, my MZ-R70 has inadvertantly messed up a disc. The first time (a
few months ago), I apparently activated the record slider as I removed it (in its
Severed leather
pouch) from my belt. It proceeded to overwrite the rest of the disc with a single
blank track. So this
|3. Adjust levels *before* the A/D to prevent overload while maximizing dynamic
| range. Most modern MD recorders have fixed gain *berfore* the A/D; not a
| good thing!
Absolutely. So you use the LM1973's you mentioned in a programmable gain
configuration, right? Are these parts quiet
On the subject of building your own mixing system for MD, what do you find
lacking in commercially available mixers that would prompt you want to build
your own? I can see that battery power and small size could be requirements
not met by many mixers.
In addition to the requirements you
After a few attempts to record MDs using electret mics plugged directly into my MZ-R70,
I have noticed these problems:
1) The gain ahead of the A/D is *fixed*, so it is possible to overload the A/D. This
happens
with a not-too-load signal, for instance, someone just talking loudly.
2) The
Well, I just found that my MZ-R70 wrote silence over about an
hour of material because the record got inadvertantly pressed
as I took it (and it's Severed leather case) off of my belt for
the night...
For some reason, maybe low battery, it stopped short of wiping
the entire disc, but since
couldn't there be some way of making 2X or
4X recordables? I mean, I know obviously it's not as easy as it would be to
do on the 4X deck, but maybe some sort of USB port with a winamp plugin that
speeds up the audio output? Is this possible?
Current recorders only accept S/PDIF at 1X. With
A couple positive signs that MD might be catching on:
Just today, I saw some MZ-R37's at The Wall, a chain music store in the
Oxford Valley Mall (NE Philadelphia). They had an open box unit for $70,
a half dozen sealed boxes for $100 and a half dozen blister pack with USB
adapter for $130.
As I understand the
naming of the tracks on the MD will be easier
No, it won't, since none of that information is carried on the PCM signal.
In fact, that information *is* on the the S/PDIF digital audio signal coming
from the digital output of a CD player (assuming the disc is encoded with
I've seen the hype about the MDS-LSA1. It may be a product ahead of its time...
Also, it seems to be marketed in Europe only (I'm in the US)..
The market they seem to be aiming at is the (future) home stereo market where
most audio a video components are digital, with firewire interface.
Can anyone explain why the MD hasn't been developed and promoted as a very
general data format?
1) RIAA restrictions cauused Sony to make MD Data incompatible with MD audio.
This is enforced by firmware in the drive. MD audio discs will not record in an
unmodified MD data drive. MD audio
I have done quite a bit of LP-to-MD. The biggest hint I can offer is:
Do it a track at a time. Fade out at the end of each track to eliminate
surface noise between tracks. I use A-B edit to chop off the surface
noise at the beginning of each track. (Point A is set to track top and
point B
What audio recorder technology is the general public buying these days?
I think cassette is still the dominant recordable format. The thing I notice is
that, since personal and in-dash CD players have become widely available
and inexpensive, many of those who would have, in the past, used
My guess is that while the CD-ROM drive is backtracking from the end of the
last track to the start of the first, it interrupts the S/PDIF output, so
when it starts to play the first track, the pre-roll effect is lost.
Quite right. The digital output is interrupted whenever the drive is
I tried adding a TOSlink to by Samsung SC140 CDROM. It worked, sort of.
The problem is that on most CDROM drives (this one included) the S/PDIF
header does not output a vaild signal unless the drive is actually playing.
(Normal audio CD players output a valid 0 signal when not playing.)
The MD
I recently downloaded a copy of Simon Taylor's MDSPC2
recording program. It automates the process of making MDs
from the computer. You just move a bunch of files to the
record section of the window and press record. It records
and titles the disc with no further intervention!
This software
CE2000 support direct editing of MP3 files... and CE96 don't...
Perhaps it would be more correct to say that CE2K will read and write MP3.
It does decompress and recompress when doing this, so there is generational
loss. It does not perform the editing *in* the MP3 domain.
CE2K has a
I used CoolEdit 96 almost from the start and upgraded to CE2000
several months ago. Many things are almost the same, so there isn't
much of a learning curve, so far as I can see. Like WinME, the
user interface looks a bit slicker. It probably has lots of little changes,
so whether it'd be
well, 1,3,7,15,31 is (2^n)-1, though the rest of the pattern seems irregular.
any ideas?
Sounds something like a shift-register (with XOR taps) pseudo-random generator.
They always generate the same sequence, which never contains zero. (Zero would
cause the sequence to get "stuck".) The
Well, I have at least a partial answer to whether Mcrew is backwards compatible
with the Sony MDS-PC2. I downloaded and installed it and get the error "PCLK-10
does not respond" when I run it, so apparently it is not backward compatible
to the CAV-50C serial interface. It might actually run
I just noticed that when playing a CD with Windows Media player, the
volume is adjusted by the "Wave Volume", whereas when using the
CD player program, the volume is adjusted by "CD Volume". I conclude
that Windows media player is actually digitally extracting ("ripping") the
file and passing
These people sell rechargable batteries and chargers:
http://store.yahoo.com/sterlingtek/mahpremfasba.html
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The MZ-R70 is supplied with a NiCd cell and has a built-in charger.
I have the following questions:
1) When the charge cycle is initiated by pressing "Stop", does the internal
charger first discharge the battery completely before charging so that the
NiCd does not exhhibit the "memory effect"
Rather than argue about the definition of "different", it is probably
best to summarize the important properties:
1) Audio and data CDRs have differing type bytes that allow audio
recorders to identify and refuse to record on data CDRs. This is
indelably stamped and may not be erased or
Just stopped by Circuit City and got a pair of Koss SportaPro headphones.
These are some of the best sounding headphones for $20! They are WAY
above anything else I've heard at this price. For purists, they are a touch
"heavy" in the bass (probably not a bad thing for many listening
David W. Tamkin said:
A sampling rate converter has to interpolate values between samples to gene-
rate [a model of] a continuous waveform just as a DAC does, and then it has
to sample that [model of a] waveform just as an ADC does
This is true; both SRC and DAC/ADC methods accomplish the
Maybe that new protocol over USB could also implement a true track mark
signal.
It could also include titling, deck control, bi-directional audio transfer and such...
All the
stuff that the MDS-PCx decks attempt to do and more! USB could even supply the
modest power requirements of a
I have several MDs of assorted jazz that were downloaded from MP3.com as 128K MP3's.
I've used CoolEdit 2000 to decompress and play them via S/PDIF (TOSlink) to the MDS-PC
recorder. I've noticed very few artifacts that I can attribute to the MDs ATRAC
encoding. The biggest problem with
Newer CD decks also
have the 20 bit (and some with 24 bit) resolution so the analogy on that
issue isn't totally accurate (although I believe all computer burners are
still just 16 bit so still a good point).
The CD, as originally developed by Philips and Sony, only has enough bits
for
In fact, MD copy
has the following characteristics: obviously less dynamics, very poor bass
and Jazz devil has plenty of it), narrow stereo image, and in general
flatten sound picture.
I wonder if you were hearing effects of the MD's analog section rather than problems
with the ATRAC?
I used
I'm looking for a portable MD player (+/- recorder) with both
LP modes -and- and very good DAC. I think the DAC in my Sony MZ-R50 is holding
back the fidelity of the music (based on tests along the lines Francis was
suggesting).
"Portable" and "very good DAC" are mutually exclusive for
Actually, for analog FM stereo, it's 19KHz (+ or - 2 Hz) at 10% or less modulation.
Also, the lower sideband of the L-R
stereo subchannel extends downwards from it's center at 38 KHz towards 19KHz, so you
may also be getting alias
components from the extreme high end of the subchannel if
I've decided that I need a (relatively)
inexpensive, compact, high-quality sound recorder for audio for my short
films.
This reply is somewhat technical, but synchronized audio-for-video using separate
recorders does not "just happen"; some
basic principles (not always clearly understood)
Several people have asked me questions via private emails regarding subcode. While
much information is generally
availabe describing the CD subcode format and even how it is transmitted via S/PDIF, I
have found very little regarding MD
subcode formats. All I know at this point is that, for
I have a few discs of light jazz that I've downloaded from MP3.COM. All of the
material on MP3.COM seems to be recorded
at 128Kbps. Some of the files are encoded better than others, but even the best seem
to have a slightly edgy quality to the
treble. I find the worst encoded files hard
The short answer to the track mark via S/PDIF is to insert pauses between the songs
(there are Winamp plugins available)
and use the "auto track" feature of the MD recorder. The long (more technical) answer
is: When recording CD to MD,
most of the CD subcode information, in particluar the
One of the problems of bit-for-bit comparison of a signal recorded by MD: I wonder if
the problem could have to do with the
sample-rate-converter in the MD? I've often had the nagging suspicion that the
sample-rate-converter is not defeatable.
My theory is that even when the input signal
Consumer MD recorders are designed to be used with electret capacitor microphones.
This type of mic uses a small foil
diaphram with an electret (permanently charged) backing. This, like all capacitor
microphones, has a very high output
impedance, so it cannot directly drive the connecting
The USB Audio spec has no provision for transferring auxiliary
data along with an audio stream. The spec needs to be extended here.
There's no reason that an extended (or even new) spec for an MD recorder with native
USB could not include track marks,
titling, and faster than 1X transfer,
First, you need an MD with a digital output. So far as I know, there are no portables
with digital out, only digital in, therefore
you will have to use a home MD deck. Then you need a sound card with a digital INPUT,
many have only digital output. The
setup I use is a Sony MDS-PC2 deck
With respect to the 1X PC - MD problem and why they havent come out with a recorder
with a decent built-in USB
interface, I think they're play "both sides of the fence" when it comes to issues of
whether MD classifies as a music
recorder or a computer peripheral. The real culprit in this
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