5.1 line-up tones

[Tony Kosinec]

Hello all
I couldn't find this in the FAQ.. Probably because it's too dumb but...
I know the EBU version but what is the SMPTE line-up tone sequence. - what do I need to print at the head of a 5.1 mix

[TVPostSound]

The broadcaster defines the specs.
It's in the delivery requirements for the show you are doing.

Ask your show's contact.

[Tony Kosinec]

Thanks for the reply This is for an indi film there's no broadcaster yet so I'm looking for the basic requirement

[garnoil]

I always have line up tones both in sine for electronic alignment and in RMS pink for room alignment. In my opinion, you absolutely need tones especially in low budget indie films as you never know who may be doing a tape layback, DCP, or even authoring.

[Tony Kosinec]

What do you use- 1k @-20 peak for L R C Ls Rs and 80hz for LFE? And what RMS?


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[MIKEROPHONICS]

Can't go wrong with BLITS tone - surely. It's the euro standard. Helps sort out channel identification and phase errors and gives tones for downmixing.
If you include an explanation then what's not to like.

http://www.ips.org.uk/files/03_BLITS...ound_Ident.pdf

[garnoil]

Originally Posted by Tony Kosinec

What do you use- 1k @-20 peak for L R C Ls Rs and 80hz for LFE? And what RMS?


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The 1Khz tone at -20dbfs is for electrical alignment, all channels including the LFE have the same tone. When the tone plays in Pro-Tools all channels will read -20dbfs. This is used so that 'lay back' aligns their system to read -20dbfs.

I put Pink RMS at -20dbfs in all channels including LFE. This tone is to check that the SPL playback levels are matched to 85 dbSPL C slow. If this tone is sent to the subwoofer, the channel itslef has a given high cut off frequency usually at 120Hz which is 1/2 of the sampling frequency of the channel and because of this frequency response, the SPL level of the sub would be about 4 db higher than the other channels (so it would read around 89db spl c slow. The pink tone (across all channels) is more to ensure that the theater - many times smaller indie theaters- does not have the master audio volume too low. So, the pink noise is more of a double check for volume playback and not really meant to for re-alignment of the theater. Theaters have their own aligning tones and equipment. I want to add that each speaker must read 85dbC slow and NOT a combined volume of all speakers.

[Tony Kosinec]

Thanks so much this is what I was looking for


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[Tony Kosinec]

Thanks Mike


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