#apertus IRC Channel Logs

well utimately, a professional camera can totally go without recording sound

meaning image and sound are captured on separate devices

dmx ?

I'm just asking because we had a discussion that 'professional audio' uses USB

yes, there is indeed an xlr audio pinout, not sure how common it is though http://www.clarkwire.com/PinOutXLRBalanced.htm

well, we talked about audio and audio support for recording (in the camera)

and as I haven't seen any professional audio equippment (not camera related) which relies on USB as protocol, I thought, I ask around what you folks have seen/used

that's for shoulder cameras generally designed for TV

never heard of such a thing

I don't think USB and audio is a good idea for several reasons

second, the linux kernel and userspace needs to handle all the synchronization

that's a lot of resources and power for being able to 'plug-in' a cheap usb audio dongle

OTOH, if we support I2S or similar, maybe even S/PDIF

though there are also Firewire, PCI (has rack unit + pci card, mainly for studios) and now Thunderbolt on Macs

AES3 is fine too of course

my cubieboard has I2S !

usually using TOSLINK optical fiber

It's totally good enough for consumer speakers, not sure it would be a good fit here.

another question is, do we want to attach mics directly to the camera? I'd expect some kind of preamp/equalizer/etc

back ...

thanks!

I'm reading through the comments on the latest axiom update just now: Jonathan Smith wrote "Hi have you updated github? I was thinking of buying the hard ware this week and start developing along side and share ideas. Also I noticed that the component layout for sensor board was not there. Thanks for all your hard work"

(will put it on my todo list for this week)

Gabe is also waiting for an updated version to order from OSHpark

hmm, no, sebastian already did that, and the 1.1 version is checked in ...

Sasha_C: what is Jonathan Smith referring to?

Bertl: I'm not sure. His comment can be found at the bottom of the page: https://www.apertus.org/axiom-alpha-progress-article

I see three comments on that page

Ah, I see the problem. The last comments still require approval. Doing it now

Check the comments again now on the news update page

No problemmo

Hit refesh?

but adding ?silly works :)

its not a bug

caching of pages

why does it cache pages when they have changed?

when the page changes, the header is updated and the cache purges the old data

I will look into it

Hi there

please somebody hint Jonathan to https://github.com/apertus-open-source-cinema/alpha-hardware/tree/master/SFE-PCB

v1.1 is the one we are using, v1.2 incorporates all the changes we found useful so far and a little more

lets see if that does the trick

Bertl: Don't quote me but 5 pin stereo XLR.

Bertl: But just commit to a double system and skip it.

Bertl: Camera's primary target is imaging. Audio is yet another distraction for a too small Axiom crew.

well, the decision is not mine (alone) to make, but I agree that audio is not the primary focus

Bertl: You won't find a single small low budget production that _doesn't_ use a double system.

Bertl: Even on no budget shorts I have participated on we _always_ used a double system.

speaking of, how is time usually synchronized in a camera? i.e. do you care about the real time or just about relative timing?

Or constant TC via a sync box.

(A sync box lives on the camera and provides a TC out via BNC. Jamming is once everywhenever (start of day, lunch, etc.))

http://www.bhphotovideo.com/c/product/562544-REG/Denecke_SB_3_SB_3_Syncbox_Time_Code_Generator.html

or is the video data the time base?

I'm wondering because we won't get high precision timing without GPS for example

Bertl: You need an input.

ah, good to know, simplifies things

Both are pretty common practice.

And the sync boxes too can be jammed off of a single master.

3.5 in

time for the first christmas punsch of the year :)

good night :)

would be cool

and depends on what we want to show in the crowdfunding video

time for bed