On 06/17/2013 05:52 PM, Stefan Schreiber wrote:
For clarification:
Could the eigenmike also do some 4th order recording (in a "real" sense,
not giving some 4th order "output"), or is it a 3rd order microphone?
with 32 capsules, the eigenmike is capable of measuring the full set of
fourth-order harmonics, but only with limited bandwidth.
that's the main problem with the eigenmike: the higher the order, the
narrower the bandwidth and the higher the lower boundary. which means
that an eigenmike signal set will not usually be downwards-compatible -
if you aim for a correct amplitude response for the full 4th order set,
it will sound duller and duller the more orders you truncate. it is
possible to generate a spectrally correct output for each subset of
orders, but that has to be computed from the a-format, with a priori
knowledge of the playback order.
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Jörn Nettingsmeier
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