3d_sampler_bd_cover
AIX Records 3D Music Album Demo & Calibration Disc

Mark Chesnutt, Rita Coolidge, Free Flight & others more

oppo_aix_hd_sampler
AIX Records Calibration Disc & HD Music Sampler

Various Artists & Complete Test Tones more

dolby_aix_HD_sampler
AIX Records BD HD Sampler IV

Various Artists & Genres [21 tracks] more

high_res_experience_sampler
A High-Resolution Audio Experience

Various Artists & Genres [29 tracks] more

goldberg_variations_bd_cover
Goldberg Variations Acoustica

The AIX All Star Band more

mozart_bd_3d_cover
The Old City String Quartet - Mozart

Corey Klein / Horn and Ruokai Chen - Clarinet more

gorka_bd_cover
John Gorka - A Gypsy Life

featuring Susan Werner, Amelia K. Spicer, Russ Rentler & Michael Manring more

cmp_cover
Chamber Music Palisades - Shostakovich/Debussy/ Brockman

Chamber Music Palisades more

pachelbel_cover
Pachelbel Acoustica

The AIX All Star Band more

aix_3d_sampler_cover
AIX Records 3D Music Album Demo & Cal. Disc

Mark Chesnutt, Rita Coolidge, Free Flight more

aix_sampler_iv_cover
AIX Records BD HD Sampler IV

Various Artists more

aix_oppo_cover
AIX Records - BD Audio Cal Disc & HD Music Sampler

HD Video & HD Audio tracks from AIX Records more

gorka_cover
John Gorka - The Gypsy Life

Susan Werner, Amelia K. Spicer, R. Rentler & M. Manring more

gorka_cover
John Gorka - The Gypsy Life

Susan Werner, Amelia K. Spicer, R. Rentler & M. Manring more

lowen_navarro_cover
Lowen & Navarro - Carry On Together

Phil Parlapiano, Brett Simons & Dan Marfisimore

jonathan_mceuen_cover
Nitty Gritty Surround

John McEuen, Jimmy Ibbotson & guest Jennifer Warnes more

jonathan_mceuen_cover
Jonathan McEuen - One Step Ahead

guests Jamie Hanna, Phil Salazar and John McEuen more

ktla_cover
Music Of Lowen & Navarro - Keep The Light Alive

Jackson Browne, John Ondrasik, Keb' Mo', The Bangles more

afro_cuban_latin_jazz_cover
The Afro Cuban Latin Jazz Project - El Vuelo

Kamasi Washington, Gustavo Ramierez, Raul Pineda more

ernest_ranglin_cover
Ernest Ranglin - Order of Distinction

Robby Krieger, Elliot Easton, Monty Alexander more

steve_march_torme_cover
Stevé March Tormé - Tormé Sings Tormé

Steve Rawlins, Jim DeJulio, Lanny Morgan, Bobby Rodriguez & more

vantage_point_cover
Vantage Point - Resolution

Simon Phillips, Jaff Babko, Walt Fowler, Brandon Fields & Alphonso Johnson more

emil_richards_cover
The Emil Richards/Joe Porcaro Allstar Big Band - Odd Men In

Pete Christleib, Chuck Findley, David Garfield & Bruce Zweig more

grant_geissman_cover
The Grant Geissman Quintet - There and Back Again

Gordon Goodwin [Big Phat Band], Jim Cox, Jimmy Johnson & Greg Bissonette more

steve_huffsteter_cover
The Steve Huffsteter Big Band - Gathered Around

with Bill Perkins, Lee Thornburg, Buddy Childers, and Jock Ellis more

surrounded_by_christmas_cover
The AIX All Stars - Surrounded By Christmas

with Laurence Juber, Jim Cox, Leland Sklar, Steve Forman and John Ferraro more

calamari_cover
Calamari

Emil Richards, Joe Porcaro, David Garfield & Mike Valerio more

jim_dejulio_cover
The Jim DeJulio Jazz Quintet

featuring Pete Christlieb, Conte Candoli, Pamela York and Joe La Barberamore

latin_jazz_trio_cover
The Latin Jazz Trio

Luis Conte, David Garfield & David Carpenter more

rretro_jazz_quintet_cover
David Garfield & the Retro Jazz Quintet

David Garfield, Walt Fowler, Larry Klimas, Ernest Tibbs, Oscar Seaton more

cheryl_bentyne_cover
Cheryl Bentyne - Among Friends

Corey Allen, Grant Geissman, Kevin Axt & David Tull more

paul_smith_cover
The Paul Smith Trio

Jim DeJulio & Dave Tull more

patrice_rushen_cover
Piano, Bass & Drums

Patrice Rushen, Darek Oleszkiewicz & Ndugu Chancler more

ac_timba_jazz_cover
AC Timba Jazz

featuring the music of Long John Oliva more

goldberg_variations_bd_cover
Goldberg Variations Acoustica

The AIX All Star Band more

pachelbel_cover
Pachelbel Acoustica

The AIX All Star Band more

moonlight_cover
Moonlight Acoustica

The AIX All Star Band more

albert_lee_cover
Albert Lee - Tearing it Up

Randle Curry, J.T. Thomas, Bob Glaub & Don Heffington more

hanna_mceuen_cover
Tried & True

Jaime Hanna & Jonathan McEuenmore

rumor_mill_cover
The Carl Verheyen Band - Rumor Mill

with special guest Jim Cox more

blueshead_cover
Steve Pierson & Blues Head - Blue Me Away

Laurence Juber, Michael Murphy, Gerald Johnson & Gary Mallabermore

surf_city_cover
The Surf City Allstar Band - I Get Surround

Dean Torrence & Jeff "Skunk" Baxter more

bad_haggis_cover
Bad Haggis - Span

with special guest Ruben Blades more

grant_geissman_cover
The Grant Geissman Quintet - There and Back Again

Gordon Goodwin [Big Phat Band], Jim Cox, Jimmy Johnson & Greg Bissonette more

take_one_step_cover
The Carl Verheyen Band - Take One Step

Cliff Hugo, Chad Wackerman, Bernie Dresel & Jim Cox more

deacon_john_cover
Deacon John - Jump Blues

with Dr. John & Allen Toussaint more

deacon_john_cover
Keaton Simon - Drive Away!

with Scott Bruzenak, Nate Wood, Scott Seiver more

brand_new_opry_cover
The Brand New Opry - Another Time Vol. 1

Jonathan McEuen, Phil Salazar, Jamie Hanna, John McEuen & Albert Lee more

jonathan_mceuen_cover
Nitty Gritty Surround

John McEuen, Jimmy Ibbotson & special guest Jennifer Warnes more

jonathan_mceuen_cover
Jonathan McEuen - One Step Ahead

with Nathan McEuen, Jesse Siebenberg & Randy Tico more

lisbeth_scott_cover
Lisbeth Scott - Charmed

with very special guest Paul Schwartz more

laurence_juber_cover
Laurence Juber - Guitar Noir

with Domenic Genova & Steve Forman more

peppino_dagostino_cover
Peppino D'Agostino, Acoustic Guitar

with Juan van Emmerloot - perc/drums more

ktla_cover
Music Of Lowen & Navarro - Keep The Light Alive

Jackson Browne, John Ondrasik, Keb' Mo', The Bangles more

gorka_bd_cover
John Gorka - A Gypsy Life

Susan Werner, Amelia K. Spicer, Russ Rentler & Michael Manring more

gorka_cover
John Gorka - The Gypsy Life

featuring Susan Werner, Amilia K. Spicer, Russ Rentler & Michael Manring more

lowen_navarro_cover
Lowen & Navarro - Carry On Together

Phil Parlapiano, Brett Simons & Dan Marfisi more

surrounded_by_christmas_cover
The AIX All Stars - Surrounded By Christmas

with Laurence Juber, Jim Cox, Leland Sklar, Steve Forman and John Ferraro more

ian_whitcomb_cover
Ian Whitcomb - Turned On Alley

Bobby Bruce, Fred Sokolow, Tom Marion, Tim Emmons & Randy Woltz more

dorian_michael_cover
Dorian Michael - Acoustic Blues

with Laurence Juber & Albert Lee more

zephyr_cover
Zephyr: Voices Unbound

12-voice a cappella choir more

lisbeth_scott_cover
Lisbeth Scott - Charmed

with very special guest Paul Schwartz more

paul_williams_cover
Paul Williams - I'm Going Back There Someday

special guests Willie Nelson, Melissa Manchester & The Great Gonzo more

ktla_cover
Music Of Lowen & Navarro - Keep The Light Alive

Jackson Browne, John Ondrasik, Keb' Mo', The Bangles more

lowen_navarro_cover
Lowen & Navarro - Carry On Together

Phil Parlapiano, Brett Simons & Dan Marfisimore

gorka_bd_cover
John Gorka - A Gypsy Life

featuring Susan Werner, Amelia K. Spicer, Russ Rentler and Michael Manring more

gorka_cover
John Gorka - The Gypsy Life

featuring Susan Werner, Amilia K. Spicer, Russ Rentler & Michael Manring more

steve_march_torme_cover
Stevé March Tormé - Tormé Sings Tormé

Steve Rawlins, Jim DeJulio, Lanny Morgan, Bobby Rodriguez & dektette more

brand_new_opry_cover
The Brand New Opry - Another Time Vol. 1

Jonathan McEuen, Phil Salazar, Jamie Hanna, John McEuen & others more

jonathan_mceuen_cover
Nitty Gritty Surround

John McEuen, Jimmy Ibbotson & special guest Jennifer Warnes more

blueshead_cover
Steve Pierson and Blues Head - Blue Me Away

Laurence Juber, Michael Murphy, Gerald Johnson & Gary Mallabermore

surf_city_cover
The Surf City Allstar Band - I Get Surround

featuring Dean Torrence & Jeff "Skunk" Baxter more

ian_whitcomb_cover
Ian Whitcomb - Turned On Alley

featuring Bobby Bruce, Fred Sokolow, Tom Marion, Tim Emmons & Randy Woltz more

dale_spalding_cover
The Dale Spalding Band - Downtown

Lon Price, Bruce Malament, Tomas Gargano & Kenny Elliot more

fred_sokolow_cover
Fred Sokolow

with Ian Whitcomb & Junior Brown more

nicci_gilbert_cover
Nicci Gilbert - Nicci Gilbert & Friends

Demetria McKinney, Jaretta Lott, Monifah Carter & Tammy Townsend more

jonathan_mceuen_cover
Jonathan McEuen - One Step Ahead

with guests Jesse Siebenberg, Phil Salazar & Randy Tico more

mozart_bd_3d_cover
The Old City String Quartet - Mozart

Corey Klein / Horn and Ruokai Chen - Clarinet more

cmp_cover
Chamber Music Palisades - Shostakovich/Debussy/Brockman

Chamber Music Palisades more

cmp_cover
Chamber Music Palisades - Shostakovich/Debussy/Brockman

Chamber Music Palisades more

chopin_ballades_cover
Chopin - The Ballades

Anita Chang - piano more

beethoven_njso_cover
Beethoven - Symph. 6/ Respighi - Pines of Rome

New Jersey Symphony Orchestra - Zdenek Macal more

brahms_piano_quintet_cover
Johnnes Brahms - Piano Quintet Op. 34 in F Minor

Delores Stevens & Ives Quartet more

zephyr_cover
Zephyr: Voices Unbound

12-voice a cappella choir more

chopin_prosseda_cover
Chopin - Selected Piano Works

performed by Roberto Prosseda more

stravinsky_ravel_cover
Stravinsky - Firebird/Ravel - Bolero

George Enescu Philharmonic Orchestra/Cristian Mandeal more

mozart_41_26_cover
Mozart Symphonies 26 & 41 "Jupiter"

George Enescu Philharmonic Orchestra/ Cristian Mandeal more

bach_brandenburg_cover
Bach - Brandenburg No.s 3 & 5 / Air on the G String

George Enescu Philharmonic Orchestra/ Cristian Mandeal more

haydn_trios_cover
Haydn Keyboard Trios No.s 39, 40 & 26

The "Pro Arte" Trio more

scarlatti_beethoven_cover
Six Sonatas for Woodwind Quintet / Woodwind Quintet Op. 71

The "George Enescu" Quintet more

debussy_harp_cover
Music for Solo Harp - Debussy, Glinka & Others

performed by Ion Ivan Roncea more

mixtures_1_cover
A Classical Surround Sampler

Various Ensembles more

marcello_hanel_vivaldi_cover
Marcello-Oboe Concerto Handel-Organ Concerto Vivaldi-2 Sinfonias

A. Petrescu/N. Licaret more

mozart_schumann_piano_cover
Mozart - Variations K. 573 / Schumann - Fantasie Op. 17

performed by Matei Vargas, piano more

michael_williams_piano_cover
Lyricism: Songs Without Words

performed by Roberto Prosseda more

brahms_clar_quintet_cover
Brahms Clarinet Quintet

Dimitri Ashkenazy, clarinet & Ives String Quartet more

albert_lee_ce_cover
Albert Lee - Tearing it Up

Randle Curry, J.T. Thomas, Bob Glaub & Don Heffington more

albert_lee_cover
Albert Lee - Tearing it Up

Randle Curry, J.T. Thomas, Bob Glaub & Don Heffington more

hanna_mceuen_cover
Tried & True

Jaime Hanna & Jonathan McEuenmore

brand_new_opry_cover
The Brand New Opry - Another Time Vol. 1

Jonathan McEuen, Phil Salazar, Jamie Hanna, John McEuen & others more

jonathan_mceuen_cover
Nitty Gritty Surround

John McEuen, Jimmy Ibbotson & special guest Jennifer Warnes more

albert_lee_ce_cover
Albert Lee - Tearing it Up

Randle Curry, J.T. Thomas, Bob Glaub and Don Heffington more

albert_lee_cover
Albert Lee - Tearing it Up

Randle Curry, J.T. Thomas, Bob Glaub and Don Heffington more

laurence_juber_cover
Laurence Juber - Guitar Noir

with Domenic Genova & Steve Forman more

peppino_dagostino_cover
Peppino D'Agostino, Acoustic Guitar

with Juan van Emmerloot - perc/drums more

ernest_ranglin_cover
Ernest Ranglin - Order of Distinction

with Robby Krieger, Elliot Easton, Monty Alexander more

rumor_mill_cover
The Carl Verheyen Band - Rumor Mill

with special guest Jim Cox more

grant_geissman_cover
The Grant Geissman Quintet - There and Back Again

Gordon Goodwin of the Big Phat Band, Jim Cox, Jimmy Johnson and Greg Bissonette more

dorian_michael_cover
Dorian Michael - Acoustic Blues

with Laurence Juber & Albert Lee more

fred_sokolow_cover
The Dale Spalding Band - Downtown

Lon Price, Bruce Malament, Tomas Gargano & Kenny Elliot more

blueshead_cover
Steve Pierson and Blues Head - Blue Me Away

Laurence Juber, Michael Murphy, Gerald Johnson & Gary Mallabermore

dorian_michael_cover
Dorian Michael - Acoustic Blues

with Laurence Juber & Albert Lee more

dale_spalding_cover
The Dale Spalding Band - Downtown

Lon Price, Bruce Malament, Tomas Gargano & Kenny Elliot more

ktla_cover
Music Of Lowen & Navarro - Keep The Light Alive

Jackson Browne, John Ondrasik, Keb' Mo', The Bangles more

paul_williams_cover
Paul Williams - I'm Going Back There Someday

special guests Willie Nelson, Melissa Manchester & The Great Gonzo more

rumor_mill_cover
The Carl Verheyen Band - Rumor Mill

with special guest Jim Cox more

take_one_step_cover
The Carl Verheyen Band - Take One Step

Cliff Hugo, Chad Wackerman, Bernie Dresel & Jim Cox more

deacon_john_cover
Keaton Simon - Drive Away!

with Scott Bruzenak, Nate Wood, Scott Seiver more

afro_cuban_latin_jazz_cover
The Afro Cuban Latin Jazz Project - El Vuelo

Kamasi Washington, Gustavo Ramierez, Raul Pineda more

latin_jazz_trio_cover
The Latin Jazz Trio

Luis Conte, David Garfield & David Carpenter more

ac_timba_jazz_cover
AC Timba Jazz

featuring the music of Long John Oliva more

bad_haggis_cover
Bad Haggis - Span

with special guest Ruben Blades more

ernest_ranglin_cover
Ernest Ranglin - Order of Distinction

with Robby Krieger, Elliot Easton, Monty Alexander more

afro_cuban_latin_jazz_cover
The Afro Cuban Latin Jazz Project - El Vuelo

Kamasi Washington, Gustavo Ramierez, Raul Pineda more

ac_timba_jazz_cover
AC Timba Jazz

featuring the music of Long John Oliva more

latin_jazz_trio_cover
The Latin Jazz Trio

Luis Conte, David Garfield & David Carpenter more

romanian_folk_cover
Romanian Folk Music

featuring The Adrian Petrescu Band more

HD MUSIC DOWNLOADS
The entire catalog of AIX Records, including the 5.1 surround mixes, is available for downloading. You can choose to download files from this site or visit our partner site iTrax.com to access our HD digital files.
ARTICLES
analog _not_hd
Analog Tape Can Never Be HD: Here's Why - Part I
First, let me state that I'm not against analog recording. I have been using analog tape machines for over 30 years and still have my NAGRA IV-S machine and QGB 10 1/2" reel adapter in my studio (I just noticed a QGB went for over $5K on eBay…but I cannot part with my machine). However, I continue to read on other forums that analog recording is the "brass ring" or ultimate standard which all other recordings should be compared… including HD PCM digital.

Nothing could be further from the truth. Even some very well respected audio engineers insist that analog tape machines deliver a superior reproduction of music. I do agree that it produces its own sonic signature that is preferred by some engineers/producers (T. Bone Burnett among them) and consumers, but their preference couldn't possibly be because the playback fidelity of the recording matches the acoustic reality of the original musical instruments/voices. Analog recording just cannot produce the same level of fidelity (dynamic range and frequency response) that a well-done HD PCM recording can.

Take a look at the printed specifications as listed in the NAGRA IV-S INSTRUCTION MANUAL: Note the frequency response curve. It clearly shows that at 15 ips (inches per second), the highest frequency that can be captured on a master tape begins to drop quickly after 20 kHz. This is for the master tape, the one used at the time of the original recording. Each analog copy to copy degrades the SNR by an additional 6 dB. We consumers never get to hear the original source tape. The normal production process was/is to record to an analog multichannel machine (which BTW has less than half the track width of my NAGRA and therefore 6 db less SNR, mix down to a 2-channel stereo machine and then finally to a master. This is then cloned using analog to analog methods (another 6 dB of SNR loss) and the vinyl parts cut. The point is that these numbers are best case examples.

frequency_graphic
NAGRA IV-S Frequency Response Graph at 15 ips

The next image is also from the manual and shows the dynamic range of the NAGRA IV-S. The very best that it can do isNAB 72 dB at 15 ips using NAGRAMASTER EQ. I'm written on this site that 12-bits of word length (using PCM coding) is enough to fully capture the dynamic range of a well done analog recording. Note that another 1.5 dB can be achieved by having wider tracks on the heads. If you use Dolby SR or another noise reduction system, the number can jump up substantially but it will never equal plain old 16-bit PCM digital and the amount of signal processing applied during Dolby SR encoding and decoding is ridiculously high. I used to do these alignments at the studio where I first started engineering records. Another interesting specification on this list is the crosstalk and phase fluctuations that occur between tracks on an analog tape machine. These are not issues with HD PCM digital encoding (not that PCM doesn't have unique issues of its own…I will write about those as well).

nagra_stats
NAGRA SNR Specifications

Part I of this article is largely taken from the NAGRA IV-S INSTRUCTION MANUAL. It is full of specifications and charts...some of which I will quote and reproduce here. I know many will dismiss the information, specifications and charts out of hand. They want nothing to do with specifications. Their usual defense goes something like "just listen and use your ears" or "analog is just warmer and more emotional". However, the facts don't lie. Of course, music recordings, music production and music reproduction are more than just specifications just as they are more than pure emotions and feeling. However, there are certain baseline facts that cannot be refuted. Imagine if someone was to say that a video image at 720 x 480 pixels running 15 frames per second was HD? There is value is establishing technical standards/specifications and I believe that the world of music recording and delivery is way overdue for some of the rigor that is applied to video.

Here's the discussion of noise from the manual.

Section 5 of the Nagra instruction manual is entitled, "Noise added to a Signal by a Tape Recorder". It describes the types of noise that are invariably as part of audio recording using analog tape. Below is the section in the manual:

Like all other elements of an electroacoustic chain, a tape recorder adds noise to the useful signal. Manufacturers of both equipment and tape are constantly preoccupied with the problem of reducing noise to the lowest audible level.

Classification

To distinguish between the different sources the noise are classified into the following groups:

Group A

Background Noise: It is present whether a useful signal has been recorded on the tape or not.

Group B

Modulation Noise: It is apparent when a signal is recorded on tape and is proportional to the signal.

Group C

Head Magnetization Noise: This is a modulation noise, caused by a DC signal recorded by a magnetized head. While it is therefore a modulation noise (B), it is continuously present (A), and therefore is classified separately (C).

Group A: Background Noise

In a high quality recorder, background noise is essentially due to the tape and the recorder manufacturer cannot do much about it, except by making it less annoying by raising the recording level (distortion compensating circuits of NAGRA IV-S) or by using recording standards that attenuate the noise (NAGRAMASTER standard).

Group B: Modulation Noise

Modulation noise is a specific shortcoming of the magnetic recording process and it can be caused in several ways, especially by tape vibration noise, amplitude modulation noise and head magnetization noise.

Tape Vibration Noise

The tap is not transported in a perfectly regular manner; its speed varies (wow, flutter and vibration) and the frequency of the variations may be quite high. The frequency of a sine signal of constant level is therefore modulated by speed variations. Wow and flutter are well known subjective experiences, whereas a high frequency vibration of the tape simply make the recording sound dirty. As the noise disappears with the signal, it is obviously a modulation noise.

The problem is very serious with equipment of simple design, having no mechanical filters or - worse - having pressure pads on the heads. The tape vibration noise in the NAGRA IV-S has been rendered negligible.

Amplitude Modulation Noise

Record a continuous sine signal and reproduce it. Its amplitude ought to be perfectly constant, but in reality it varies by a few percent, thus producing an amplitude modulation that is heard as a noise. The amplitude fluctuations are due to several reasons, as the irregularities of the tape, the tape edges and an imperfect magnetic layer:

Irregularities of the Tape

The magnetic layer of the tape is not perfectly homogeneous; its structure and thickness are not quite regular and this is an important source of the amplitude modulation noise.

Tape Edges

The poor condition of the tape edges can also cause amplitude modulation. It is for this reason that the width of the playback head is slightly less than that of the tape.

Asperity or Drop-out Noise

When some foreign substance, such as a dust particle or any heterogeneity of the magnetic layer of the tape moves across the recording head, the particle lifts the tape off the head. The amplitude of the useful signal drops and this is audible as a noise. That noise can be notably minimized by cleaning the tape, by increasing the specific pressure of the tape on the head and by over-biasing:

Cleaning the Tape

Experience has shown that drop-out noise is worse with certain European tapes with a matt back and it appears that particles from the back loosen themselves and contaminate the magnetic layer. Sound engineers have adopted the habit to scrape the tape in a very simple an efficient way using the QRAC (a tape cleaning blade) accessory before the tape reaches the heads when doing high quality recordings with new tape, this phenomenon occurring principally only when new tape is used. With certain tapes, this cleaning operation has been very pronounced effect in reducing the drop-out noise.

Increasing the Specific Pressure of the Tap on the Heads

While a tangible increase of the tape pressure increases head wear, it also presses foreign substances into the tape - due to its elasticity - and this reduces drop-out noise.

Over-biasing

When over-biasing the tape, we operate on that part of the bias/efficiency curve where a reduction of the bias causes the efficiency to increase. Lifting off the tape reduces the bias, and the increase efficiency compensates partially for the drop-out of the recording field. This method has been used for many years with NAGRA recorders operating in Europe, where the use of matt back tape is of long standing. With 3M tape No. 206, the improvement is not sufficient to justify the drawbacks in over-biasing, but nevertheless, the operation point is still on the falling slope of the bias/efficiency curve. Those recorders adjusted for 3M tape no. 138, and with which tape No. 206 is used, operate with under-bias, which means the drop-out noise becomes very audible.

Group C: Head Magnetization Noise

A recording head through which DC flows, will record a DC signal on the tape, and this signal cannot be played back, since conventional playback heads do not permit DC reproduction. This signal should be inaudible in any case. The DC signal is, however, a source of modulation noise, and the latter is perfectly audible.

DC is not even necessary for being the cause of this problem: an asymmetrical magnetic bias, a magnetic interference field, or permanent magnetization of the heads or of the shielding have the same effect. The earth's magnetic field in particular is sufficient, unless the head is well-shielded.

In a recorder like the NAGRA IV-S - unless the oscillator has a breakdown - the bias symmetry is one order better than is necessary whilst the shielding of the recording head is "just good enough", allowing for accessibility. The earth's magnetic field, being essentially vertical in our latitudes, can cause an increase of the phenomenon when the NAGRA is turned into a vertical position.

Moreover, when operating in the RECORD, NO LIMITER position, transient signal may magnetize the recording head sufficiently to produce an audible noise. A sound of sufficient amplitude (saturation), decaying progressively, will fortunately demagnetize the recording head. The shielding, too, can be magnetized; a phenomenon particularly observed on recorders that have been shipped by air. It is therefore necessary to demagnetize them from time to time. Another effect of a magnetized head is noteworthy: It records a DC signal. As long as the tape is normally transported, only the modulation noise during playback is heard, but, when the tape is accelerated from stop to normal running speed, a "pop" can be heard. It marks the differential of the recording of the DC signal with respect to the accelerated time. This effect can be used to check whether the recording head is magnetized or not.

I find this information very informative and enlightening. I hope that readers will insist that digital download sites provide accurate information regarding the provenance of any track being listed for sale. If it came from an analog source, it will be limited in its dynamic range AND frequency response. An HD container will provide the best possible playback of the source tape (even safety copies etc), but it is NOT THE SAME AS A NEW HD RECORDING and doesn't deserve to be identified as an HD track.

MAILING LIST
To add yourself to our mailing list, please enter your email (we do not share your information).

RECENT REVIEWS

recent article
Apple Announces iTunes May Support High Resolution

There's some buzz floating around that Apple Computer is considering offering 24-bit audio on it's dominant digital... more

goldberg_variations_bd_cover
Goldberg Variations Acoustica

The AIX All Star Band more

mozart_bd_3d_cover
The Old City String Quartet - Mozart

Corey Klein / Horn & Ruokai Chen - Clarinet more

pachelbel_cover
Pachelbel Acoustica

The AIX All Star Band more

REVIEW ARCHIVES

3d_sampler_bd_cover
AIX Records 3D Music Album Demo & Calibration Disc

Mark Chesnutt, Rita Coolidge, Free Flight & others more

goldberg_variations_bd_cover
Goldberg Variations Acoustica

The AIX All Star Band more

mozart_bd_3d_cover
The Old City String Quartet - Mozart

Corey Klein / Horn and Ruokai Chen - Clarinet more

OUR FAVORITES

gorka_cover
John Gorka - The Gypsy Life

featuring Susan Werner, Amilia K. Spicer, Russ Rentler & Michael Manring more

goldberg_variations_bd_cover
Goldberg Variations Acoustica

The AIX All Star Band more

laurence_juber_cover
Laurence Juber - Guitar Noir

with Domenic Genova & Steve Forman more

lowen_navarro_cover
Lowen & Navarro - Carry On Together

Phil Parlapiano, Brett Simons & Dan Marfisimore

SPECTRAGRAPHS

lowen_navarro_cover
Lowen & Navarro - Carry On Together

Phil Parlapiano, Brett Simons & Dan Marfisimore

EXPERTS AGREE

  • "I worry about sound quality and old ways of the industry. Up-sampled CDs, play-everything consumer machines and lawyers killed the DVDA. The tragic consequence was much like humanity creating the first wheel and breaking it apart so it would not roll away. Many titles in vaults have sonic losses from compression and sampling that can’t be recovered. Yet, surely, there will be re-issues even though high resolution will not improve them. Some reviewers use analyzers to spot these marketed imposters."

    Keith O. Johnson, Chief Engineer and Technical Director, Reference Recordings

  • "It's good to know there are still some labels left dedicated to making high quality surround recordings. I applaud you for educating people about what is and isn't HD (analog tape/vinyl being an example that isn't HD)."

    Dr. Sean E. Olive / Director of Acoustic Research/Corporate R&D.


AN ENCOURAGING CUSTOMER COMMENT
"AIX is like the Bentley of audiophile labels. "

Brian Healy - Customer.
bentley