The No.1 Website for Pro Audio
 Search This Thread  Search This Forum  Search Reviews  Search Gear Database  Search Gear for sale  Search Gearslutz Go Advanced
CCIR + NAB test tapes..
Old 16th March 2010
Here for the gear

CCIR + NAB test tapes..

I just read a post which said that the tones on a 30ips NAB callibration tape are the same as those used to calibrate a machine for CCIR at 15ips. Can anyone confirm this to be the case? Can it be, I was under the impression that 30ips NAB and CCIR was a unified standard?
Old 16th March 2010
member no 666
Fletcher's Avatar
If you contact MRL MRL Calibration Tapes you can have your question answered with complete authority.

Old 16th March 2010
Here for the gear

You can use different tapes for different standards BUT you need to make adjustments to line up to compensate. MRL should be able o provide you with a conversion chart.
Old 16th March 2010
Here for the gear

Thanks you two. I shall get in touch with them.
Old 16th March 2010
Lives for gear

Or you can go to their website:

page 8...

Table 5-1 For any Calibration Tape and any Desired Playback
among the following three speeds and equalizations,
there is NO correction required: the response is flat. You can play any
of these Calibration Tapes at any of these speeds, set the reproducer
equalizers for flat response, and have a correct calibration.
30 in/s AES (IEC2)
15 in/s IEC (IEC1)
7.5 in/s IEC (IEC1)
Old 7th December 2013
Gear Maniac
matt2525's Avatar

This is great, I read that same paragraph in my manual for the 30ips MRL AES tape I have. I read it about 10 times and somehow didn't understand, but now the penny has dropped :

As it says, anyone with ANY of those tapes can play it back it ANY of those speeds and the frequency curves translate correctly.

So I can use my 30 ips AES tape for calibrating the 15ips playback for CCIR in my Lyrec as well as the 30 ips AES without any conversion or changes !!

Post Reply

Welcome to the Gearslutz Pro Audio Community!

Registration benefits include:
  • The ability to reply to and create new discussions
  • Access to members-only giveaways & competitions
  • Interact with VIP industry experts in our guest Q&As
  • Access to members-only sub forum discussions
  • Access to members-only Chat Room
  • Get INSTANT ACCESS to the world's best private pro audio Classifieds for only USD $20/year
  • Promote your eBay auctions and listings for free
  • Remove this message!
You need an account to post a reply. Create a username and password below and an account will be created and your post entered.

Slide to join now Processing…
Thread Tools
Search this Thread
Search this Thread:

Advanced Search
Similar Threads
Thread Starter / Forum
ihearsounds / High End
analogpajamas / So Much Gear, So Little Time
machineintel / So Much Gear, So Little Time
numrologst / Gearslutz Secondhand Gear Classifieds
Jonk / So Much Gear, So Little Time

Forum Jump
Forum Jump