Nice Tom,
Sounds like you have a good start! Well done, the imaging of the
plane was very distinct. Next time try for an ambient soundfield that
will help more clearly define the separate channels.
Another option for encoding surround is the Windows Media Encoder:
http://www.microsoft.com/windows/windowsmedia/forpros/encoder/default.mspx
It works well for me:
http://www.archive.org/download/GTWeddigSanhillCranes/Cranes_Surround_Test.=
wma
This was done with a set of wide sub-cardioids in the front and
hyper-cardioids in the back, A-B-C-D, a quad pattern with the mics
spaced about 1 meter from each other.
--greg
Baltimore, MD
http://www.ourmedia.org/user/627
http://home.earthlink.net/~gweddig
--- In "tk7859" <> wrote:
>
>
>
> Hi All
>
> Acouple of posts from Rob Danielson and Rich Peet in the recent
> "Ergonomic Barriers" thread set me thinking how i could try some
> surround recording at low cost (it was to be an experiment).
> Following Rob's suggestion I cobbled up a four channel barrier mic
>
> http://ad2004.hku.nl/naturesound/TomR/Surround%20Tests/surroundmic.JPG
>
> Don't laugh - it was an experiment.
>
> The Rapid triplets formed the front facing stereo mic and the
> Panasonic triplets the rearward facing mic. Two MZ-NH1 minidisc
> recorders were used for recording.
>
> I used Audacity to make the FL, FR, FC, LFE, BL and BR mono tracks -
> splitting the Rapid stereo trac fto make FL and FR. Similarly the
> Panasonic stereo track was split and changed L to R to make the BL and
> BR tracks. I made new mono tracks, filled with silence, for the FC
> and LFE tracks.
>
> I followed up Rich's suggestion and downloaded the MP3 surround
> encoder ((this software is free for trial purposes until end December
> this year) and the free MP3 surround player from
>
> http://www.iis.fraunhofer.de/fhg/iis/EN/bf/amm/mp3sur/index.jsp
>
> The MP3 Surround encoder require a single, six channel wave file as
> its input. Easier to say than to make. I eventually managed to do it
> with an 30 day evaluation copy of Audition 2. I had earlier tried to
> use the MultiWave freeware, as suggested by Bill Thompson in the
> "Surround 5.1 Without Hardware Soundcard" thread on the Yahoo
> Phonography Group, but did not manage it. After cutting my teeth
> making 6 channel wave files with Audition 2 I went back to MultiWave
> and found it very easy and quick. Look for MultiWave under the the
> digital audio/dsp banner on the left of the webpage
>
> http://www.nicolasfournel.com/
>
> The end result of the experiment is the MP3 Surround file
>
> http://ad2004.hku.nl/naturesound/TomR/Surround%20Tests/StoepMP3S.mp3
>
> This plays on a normal MP3 player - but only in stereo. If you want
> to hear it in surround you can download the MP3 surround player from
> the "fraunhofer" website mentioned above. This file was made using
> Audacity > MultiWave > MP3 Surround Encoder.
>
> The equivalent stereo file, made with the forward facing Rapid
triplets is
>
>
http://ad2004.hku.nl/naturesound/TomR/Surround%20Tests/afrontpair12amp3.mp3
>
> The surround file comes into its own when the light aircraft flys over
> my backyard.
>
> I don't have a 5.1 surround playback system so I used two stereo
> amplifiers fed from a low cost, Creative 5.1 external soundcard. I
> just did not connect a lead to the FC, LFE feed. The four, good
> quality (but old) speakers no doubt sound a lot better than a typical
> 5.1 speaker set designed for DVD players/computers.
>
> For me, the resulting surround sound is sufficiently intrigueing to
> merit further experimentation. A first step will be the construction
> of a more serious looking surround mic based on 12 Rapid capsules
> (four triplets).
>
> Cheers
> Tom Robinson
>
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