Pocket 4K: low audio levels, no 3.5mm-input

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Thomas Schumacher

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Pocket 4K: low audio levels, no 3.5mm-input

PostTue Oct 16, 2018 9:37 pm

Hi there,

maybe I'm missing something but my audio-levels with the built-in mics are very low although gain turned up to 100 %.
And when an external mic is plugged-in via the 3.5mm-input there's barely any level - in fact only if I hit the mic and the gain-sliders are greyed out for that input. The mics, Rode Stereo Video Mic Pro and Tascam TM-2x, do work on the BMPCC. I don't have an adapter at hand to test the XLR-input.

Any clues?

Thank you.
https://www.gernemehrfilm.de/
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James Spatz

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Re: Pocket 4K: low audio levels, no 3.5mm-input

PostTue Oct 16, 2018 10:51 pm

You should try to select the 3.5mm mic input, which doesn't show up in the cycle until you either unplug everything or plug in the mic level inputs. You may also need to turn off and on. The whole operation was hit or miss. If the level is still too low you may either need a mic with more output , perhaps with it's own phantom power or an external phantom power supply. With XLR the camera can provide phantom power.
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Thomas Schumacher

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Re: Pocket 4K: low audio levels, no 3.5mm-input

PostTue Oct 16, 2018 11:13 pm

Thanks much James,

strange enough, when the external mic was not plugged in I was able to raise its volume-levels, then plugged it in and it worked.
https://www.gernemehrfilm.de/
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Kristian Lam

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Re: Pocket 4K: low audio levels, no 3.5mm-input

PostWed Oct 17, 2018 4:22 am

Hi,

Good find. This is a weird one and definitely will log as a bug.
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Thomas Schumacher

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Re: Pocket 4K: low audio levels, no 3.5mm-input

PostWed Oct 17, 2018 5:59 am

Thanks Kristian.
https://www.gernemehrfilm.de/
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Kristian Lam

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Re: Pocket 4K: low audio levels, no 3.5mm-input

PostWed Oct 17, 2018 7:23 am

Hi Thomas,

The camera prevents you from selecting a different input level on the 3.5mm option if one is already selected. For example, if you have 3.5mm Left - Mic set as your Channel 1 Source, you cannot select 3.5mm Right - Line as Channel 2 Source.

If you need to change to a different input level, make sure you switch both channel sources to something else before selecting the correct input source.

There is no gain adjustment available for Line level inputs.
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Tim Lota

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Re: Pocket 4K: low audio levels, no 3.5mm-input

PostWed Oct 17, 2018 10:28 am

Hi, thanks for the find.

I just tried the camera for the first time and I had the same problem. Hadn't selected anything before, but had to plug, unplug and reboot to get to the 3.5mm MIC option.
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statman33

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Re: Pocket 4K: low audio levels, no 3.5mm-input

PostMon Oct 22, 2018 2:47 am

I experienced the same thing, took me coming on here reading this thread, then I had to unplug my Sony wireless, plug back in and turn on/off camera to see the 3.5 mic option. Very disappointed with the sound though as I had to turn the again up to 80-100% and also lower my attenuation to -0db and even then the audio was recoding at around -24db to -18db with background noise from the raised gain level.

Am I missing something here? Is the mini-XLR port any better?

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