There are other forensic time stamp signals besides bias which would
allow for an ATR-100-recorded tape to be de-fluttered by the PP
DSP. However, even though a tape may be played back by the Airshow
ATR-100, it's entirely possible that the tape was recorded elsewhere
by a different machine (having a much lower bias f). I believe that
Airshow are offering this service with PP for already-existing analog
tapes, rather than for creative layback transfers.
David Glasser is chief engineer at Airshow and he has mastered a huge
amount of audiophile CDs, DVDs, and SACDs. Great ear; great rooms;
From the PP website:
"software algorithm, developed with researchers at Cambridge
University in England, which identifies a steady-state ultrasonic
reference tone (such as tape bias or logic control) embedded within
the original analog signal and then performs continuous high-
resolution pitch correction in order to keep the reference tone at a
On Apr 29, 2010, at 4:15 AM, Shai Drori wrote:
> My experience with the ATR is just the opposite. I have tested
> various transport and some tapes were handled only by the ATR. Does
> the system figure out bias frequency automatically. What does it do
> with tapes recorded on the atr where the frequency is so high it
> doesn't show up on playback (400kHz+)?
> On 4/29/2010 8:54 AM, Paul G Turney wrote:
>> Well they only use ATR 102 machines which are notoriously rough
>> tape handlers....
>> They use software to track and maintain a bias frequency so that
>> any speed anomolies are and wow and flutter are reduced by
>> maintaining perfect pitch with this tone.
>> Not worked with Airshow mastering.
>> It appears to be a monopoly on the software so Airshow would be
>> subbing the work out to PP.
>> -----Original Message-----
>> From: Chandra Lynn [mailto:[log in to unmask]]
>> Sent: Thursday, April 29, 2010 02:12 AM
>> To: [log in to unmask]
>> Subject: [ARSCLIST] Airshow Mastering& Plangent Processes
>> I noticed some earlier postings about Plangent Processes. It
>> eliminates wow,flutter and speed aberrations from analog masters.
>> They are now working withAirshow Mastering to offer optimized tape
>> transfers. The announcement is onAirshow¹s site at http://
>> www.airshowmastering.com/plangent.htmlHave any of you worked with
>> Airshow or Plangent? If so, what has been yourexperience?