Pro tools remains one of the best suited for multichannel output software offering many treatment options 5.1 as plug-ins developed by many manufacturers (TC electronic, Dolby Laboratories, Audio Minnetonka, Neyrinck, Soundfield, Waves ...)
Among those tools that fit in a fun way in our mixer 5.1, the TC electronic LM5D is the must to be insert in our master 5.1. It gives us the history of loudness (LeqRLB), its instantaneous value and the average value ("center of gravity") over the life of the program (no sliding window of 10 seconds measuring method "short term" used by the DP570). We also have access to some kind of standard deviation, "consistency", which gives us information on the change in loudness over the duration of the program: we have a constant loudness or highly variable? Ppm level measurement is accurate and complete what is lacking in pro tools, accurate measurement of levels. The LM5D differs from LM5 by this statistical information. For measurement of the center channel with the dialogues, just cut other buses from our master 5.1. The LM5D was recently presented at IBC, and has recently become available for download from the manufacturer's website.
Among the new newly developed plug-ins, we Minnetonka Dolby E audio overcodes of RTAS allowing us to decode a Dolby E stream; the tool is also available as a standalone application Minnetonka AudioTools AWE. We were able to test it on different sizes (5.1, LtRt) (2 + 2) (5.1). This tool gives us the metadata informed about the various programs. Just insert the plug-in in a track to 7.1 and route the track to a 7.1 bus that will monitor the 5.1 and LtRt via the input respectively to 5.1 and stereo formats.
The limitations of the plug-in is unable to export at present metadata to the DP570 and the inability to decode Dolby E stream in the timeline, we are obliged to indicate in the browser Dolby E file interlaced .wav (sync is at the beginning of the session or if the TC TC is integrated into the Dolby E stream). A settings page brings up the port that would carry these metadata on the external DP570 but for now is not operational. We can reverse the order of bus, in the settings page, to work with different standards smpte, movie ...
The LtRt from Dolby E can itself be decoded by another tool developed by Minnetonka Audio, Dolby Pro Logic Surcode 2. This plug-in gives us access to different parameters (music or movie mode, panorama ...) Pro Logic 2 decoder as it can encode in LtRt with a limiter and a gain for LR LSRS C and LFE.
It is also possible to encode and decode a Dolby Surround format in pro tools thanks to plug-in TDM format developed by Dolby, Dolby Surround Tools. It encodes a LtRt from a Dolby Surround LCRS format and decode in prologic 1.
In the family of plug-ins for encoding in pro tools we have the SoundCode audio Neyrinck. The SoundCode Dolby Digital is used to encode and decode Dolby Digital.
We must educate metadata (dialog level, downmix, DRC ...) measured at this time by our DP570. The plug-in requires the same settings for the DRC Line Mode and RF Mode strangely. The decoder can decode Dolby Digital stream .wav exported directly in the Pro Tools timeline RTAS, he just have to import our stereo file to a stereo track and put the plug-in insert. This method can also be used to decode a Dolby Digital stream from a DVD player. In the window of the decoder, we can simulate the stereo and mono downmix however the DRC modes do not seem completely controlled. We could not listen without DRC (?). This remains a very good tool to encode Dolby Digital. The tool also exists for DTS, DTS SoundCode his name.
There are also stand-alone applications with audio Minnetonka, Surcode, allowing you to encode Dolby Digital, Dolby Surround, and DTS for audio and qu'encoder DVD (Disc Welder).
Another tool, the SoundCode for Broadcast is also very useful, developed by audio Neyrinck. It helps prepare the encoding Dolby E or Dolby Digital for the DP600 as files. We inform our metadata for both programs and LtRt and 5.1 can export all audio and Dolby metadata in form of .wav file compatible with the DP600. The player SoundCode we can import our Dolby E file from the DP600 and integrate it into pro tools.
Another very interesting feature of SoundCode for Broadcast, is the ability to export and import it into pro tools of RF64 files. We can export multichannel interleaved files 6 tracks for now much larger than 2 GB for long-term programs.
Dolby has developed the software version of LM100, Dolby Media Meter. This measurement software is available as a standalone application for Mac / PC or to Pro Tools RTAS / AudioSuite or Minnetonka AudioTools AWE. This plug-in allows us to measure the loudness with Dialogue Intelligence technology that automatically detects the passages with dialogues. The measurement can be made on the Dolby Digital audio format, Dolby Digital Plus, Dolby True HD, Dolby E, and PCM.
We have to wait for the Dolby E encoder with audio Minnetonka (before year end?) With the equivalent in soft DP570 to simulate the metadata in pro tools, we can always dream!
The documents of this article are from: Dolby Laboratories, Neyrinck, Minnetonka Audio, TC electronic, Digidesign.