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BeachTek evaluated the audio specifications of
the Panasonic GH4 DSLR camera with Audio Precision 515 Audio Analyzer. The
results were very impressive – the GH4 has the best specs of any DSLR we have
ever tested.
BeachTek tested it with the camera gain at the
lowest setting of -12dB with the limiter off. It has excellent low THD+N and a
very high signal to noise ratio of 78dB at the maximum -29dBu input level.
What is even more impressive is the frequency
response of 70Hz to 20kHz (-3dB down points). This is where most DSLR cameras
suffer – usually dropping off at 140Hz or so. The limiter works remarkably well
at avoiding clipping with hot inputs.
With the limiter on the S/N ratio drops a bit to
72dB but is still excellent.
However, the frequency response improves to 30Hz
to 20kHz which is remarkable for a DSLR camera. Careful listening tests
confirmed the very clean, wide bandwidth sound. This makes the GH4 suitable for
recording not only voice but music and sound effects as well where capturing low
frequencies is important.
It is refreshing to see such great results in a DSLR camera. The high quality
front end on the GH4 allows you to record professional audio directly to the
camera without having to use external audio recording gear and then having to
sync everything in post.
DXA-SLR ULTRA adapter makes this very easy.
Recommend that the camera be set to -12dB with the limiter on. This will
calibrate the camera to the DXA-SLR ULTRA and provide exceptional audio
performance.
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