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Pinocchio in Surround Sound

Monday 17 December 2012, 13:46

Simon Tuff Simon Tuff

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Editor’s note: Pinocchio was broadcast as Radio 4's Saturday Drama on Saturday 15 December. The programme is available on iPlayer Radio and is also being offered for download in a surround sound format. Here, Simon Tuff, Principal Technologist for BBC Audio and Music Technology Team explains the different file formats available. PM

Pinocchio

Audio innovation is a passion for BBC Research and Development and on occasion programmes are offered to listeners in new formats in order for us to gauge interest and accessibility to these new formats.  This month we are offering the latest Radio 4 Saturday Drama, Pinocchio in two download formats.   

Remember you can listen to Pinocchio in the regular way via iPlayer Radio - but read on if you are interested in this Surround Sound experiment.

This latest dramatisation of Pinocchio was produced by the BBC Salford team in conjunction with BBC Research and Development, using the latest form of audio production technique based on “audio objects”.  Tony Churnside explains how this is done on the Research and Development blog. To demonstrate how well this production technique works we have created 2 different (5.1) surround sound versions and made them available here.

The first version is in Dolby Digital or Dolby AC3 as it’s often called. It’s the same format that is used for DVDs and the HDTV sound on FreeSat and BSkyB. The idea with this version is to burn a copy to a DVD (with a suitable authoring tool) and then play it on your home cinema system. You can find out more about Dolby digital from their website.   This version will also play in the vlc media player on a Mac or PC. You can get information about vlc here.

  • Download Version One: Dolby AC3
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    The second version uses a format called MPEG Surround and requires a suitable media player such Winamp.  The latest freeware version (V 5.63) of Winamp should work on Windows 7 PC with a 5.1 sound card.

    To configure Winamp, select the surround sound settings (System Settings -> Sound -> Device Settings -> 5.1 Speaker Setting), load the .mp4 sound file and if you have 6 correctly located speakers you should get surround sound.

    If not then this file is cleverly constructed so that a standard AAC compatible media player will play the drama in stereo.

    Although we tried these files with the vlc & Winamp players other suitable players may well be available so if you find something else that works well please let us know by posting a comment below.

  • Download Version Two: MPEG Surround
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    We hope you enjoy Pinocchio in surround sound, as we think it really enhances the experience, but please remember that this is still experimental and thus may not work perfectly, however we are keen to know what you think so please let us know how you got on and what you made of our surround sound drama by posting your thoughts on the Radio 4 blog below.

    If you want to download the standard MP3 of Pinocchio then it will be available from the Drama of the Week download page from 21 December 2012 for 7 days.

     

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      Comment number 1.

      I'm curious: why wasn't this broadcast in a matrix surround format, such as Dolby Surround, so that people with a ProLogic compatible receiver at home could enjoy the surround version from a regular 2.0 channel stereo FM or DAB broadcast?

      I appreciate that formats above are technically and sonically superior, but they're a bit of a faff for even technically-minded users to play, and the BBC is usually all about making content available to as broad an audience as possible.

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      Comment number 2.

      This is why I pay my license fee with pride - the BBC experimenting with various technologies. This audio drama was a serendipitous find when I had my radio on while cooking. To see it available as a Dolby surround download was the icing on the cake. Well done, Auntie Beeb - keep it coming!

    • rate this
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      Comment number 3.

      We thought long and hard about using Dolby Pro Logic and Dolby have been very helpful here but in the end the BBC Technology team decided that (a) Pro Logic is a mature, analogue, technology and this project was [at least in part] about transformational digital technologies and (b) Pro Logic encoded stereo doesn't sound sufficiently the same as the uncoded stereo. It is our hope that some of the digital surround technologies will become common place and this would indeed be desirable if we were to make significantly more surround sound content for radio.

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      Comment number 4.

      In the description Simon says "The idea with this version is to burn a copy to a DVD (with a suitable authoring tool) for version 1. I assume my first attempt failed because, being a novice at this, I merely copied the AC3 file to the DVD. Now I've investigated authoting I see that audio can be written to either the Video_TS folder OR the AUDIO_TS folder on the dvd and they require different authoring techniques. Which folder should I use?

     

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