I'm very much an amateur here, so please forgive what might be a stupid
question!
I recorded a concert on Saturday (John Rutter's /Gloria /and Karl
Jenkins' /The Peacemakers/) using an Ambisonic mic and some others. I'm
encoding the A-format to B-format using VVEncode in Reaper, and panning
in the extra mics using Wigware Ambipan. The result is then decoded to
surround sound or to stereo using VVDecode; all in the same Reaper
set-up. I've used this approach before, usually successfully.
I find that, when the organ and brass are playing at full volume (I mean
in the orchestra, not just in playback), there is a 'buzzing' sound in
the playback. It sounds harsh, pitched at about 50 Hz. But if I listen
to the A-format files alone in Reaper or in VLC Media Player, there is
no buzz. Similarly, there is no buzz if I encode the A-format using the
stand-alone version of VVMic. The buzz is present both in the B-format
from the Ambisonic mic and, less strongly, in the panned B-format from
the soloists mic. It appears to be an artefact of my editing
configuration; but it didn't happen in a recording I made, using the
same configuration, last month. The only difference since then has been
that my old hard disc, which had developed some faults, was cloned onto
a new SSD.
Does this description suggest a specific problem/remedy to anyone? I
know I can produce a decent CD using the stand-alone VVMic route and
panning in the soloists into the stereo mix; but I'd like to get to the
bottom of why my Ambisonic configuration is doing this now.
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