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| 05:40 | xfxf | nice footage! optics/sensor seem super decent
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| 06:37 | Bertl_zZ | changed nick to: Bertl
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| 06:37 | Bertl | morning folks!
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| 06:37 | Bertl | xfxf: glad you liked it
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| 08:25 | se6astian | good morning
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| 08:33 | se6astian | community color grades added to article: https://www.apertus.org/axiom-team-talk-volume-12.3-article-march-2017
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| 08:33 | se6astian | many thanks for the contribution!
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| 08:56 | se6astian | hi xeechou!
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| 09:17 | atoav | Hi
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| 09:18 | atoav | I am looking into the audio extension and asked myself what kind of busses would exist in the module system
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| 09:20 | atoav | This boils down to two questions:
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| 09:20 | atoav | 1. What power rails/voltages does the axiom supply?
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| 09:21 | atoav | 2. Is there any bus that could be used to transfer the ADC converted audio streams?
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| 09:22 | atoav | If somebody has a good idea of those things, please append to this thread: https://lab.apertus.org/T361
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| 09:44 | se6astian | There are multiple options
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| 09:45 | se6astian | for audio a shield would be most suitable
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| 09:45 | se6astian | Bertl: can share the technical details
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| 09:48 | atoav | Cool
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| 09:52 | Bertl | the shields are connected directly to the routing fabrics with 2x10 GPIOs and 4 LVDS pairs
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| 09:53 | Bertl | there are two power rails for each shield, one is the IO voltage and the other can be used for powering electronics on the shields (typically 3.3V)
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| 09:58 | atoav | Bertl, thanks! for high quality preamps 3.3V is too little, we will have to bake our own for the audio shield (which is the better choice for running sensetive ADCs maybe anyways).
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| 09:58 | atoav | What is the IO voltage?
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| 09:58 | Bertl | 2.5V typically
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| 10:00 | Bertl | btw, I wouldn't put a high quality preamp on the shield, there is a lot going on in the direct vicinity, so it probably will pick up a lot of switching noise
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| 10:01 | Bertl | i.e. probably better to put the audio part into a separate and shielded enclosure
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| 10:01 | atoav | Thought so. Mhhh It would require at least ±5V, and +48V for phantom powering the microphones
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| 10:02 | Bertl | all those voltages will have to be generated, unless you want to go with a separate set of batteries as well
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| 10:03 | Bertl | but I don't think that you will need much power there, so that should be fine
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| 10:04 | atoav | I think a seperate set of batteries should be avoided from a user perspective
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| 10:08 | Bertl | the question I was asking myself is: who would be the target audience for a high quality audio recording solution embedded into the AXIOM Beta?
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| 10:08 | Bertl | because I presume that when high quality is a requirement, there will be a separate audio crew and separate recording devices anyway
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| 10:09 | Bertl | while OTOH, when we are talking the typical indie movie maker, the question remains: does it need to be that high end?
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| 10:12 | Bertl | btw, the ODAC link is for audio output
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| 10:15 | atoav | With the ODAC ytou're right, was my fault. I would focus on documentary style filmmakers, they are the ones where at least 2 XLR inputs on Camera would make sense. At least my documentary collegues are most of the times very happy about having it
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| 10:15 | Bertl | XLR is huge compared to the AXIOM Beta (and the Shields)
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| 10:16 | Bertl | so you need a separate 'plug-box' anyway
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| 10:16 | atoav | Aha, I was thinking about a dedicated module anyways
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| 10:17 | atoav | mhh
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| 10:17 | Bertl | I would go to pure digital in that box, maybe input and output if you like to use headphones or similar
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| 10:17 | Bertl | then stamp and CRC/ECC the data and send it over a simple serial link to the Beta (e.g. via one of the existing shields)
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| 10:18 | atoav | exactly that was the idea. To have a box/module, that just spits out digital audio streams for the axiom
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| 10:18 | atoav | maybe a headphone output
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| 10:18 | atoav | maybe embedded cheap cardoids for syncing when no external mics are used
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| 10:20 | atoav | I am not that fit with stepping and inverting powersupplies though, where I come from linear powersupplies are used
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| 10:25 | atoav | Bertl, thanks anyways
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| 10:26 | Bertl | I'm sure that Linear, TI, AnalogDevices and others provide solutions for low noise audio power rails
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| 10:26 | Bertl | so it is more searching for the right part
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| 10:26 | comradekingu | http://www.beis.de/Elektronik/Electronics.html has some solutions
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| 10:27 | comradekingu | that come schematics supplied
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| 10:28 | atoav | comradekingu. cool stuff
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| 10:28 | comradekingu | skimming backlog i know there are some sheild type things for i2c and whatnot, from elsewhere
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| 10:29 | comradekingu | https://www.thomann.de/gb/mytek_digital_stereo_192_adc.htm looks to have DC power
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| 10:31 | comradekingu | But it would be a phantom power box, and another one afterwards
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| 10:31 | atoav | Bertl, right. I think I need to reconsider the whole specification thing. I somehow thought this could be a Gamma Module but to be honest, I have no idea what would integrate best with the current designs
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| 10:57 | Bertl | off for now ... bbl
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| 14:21 | xeechou | Hi, I am looking for to talk with BAndiT1983, do you guys know when he is usually online, please?
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| 14:21 | Bertl_oO | in the evening (CEST)
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| 14:30 | se6astian | hi xeechou: BAndiT1983|away should be here in 3h roughly
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| 14:32 | xeechou | Oh okay, thanks for the info
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| 15:40 | BAndiT1983 | Hi xeechou
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| 15:40 | xeechou | Hi
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| 15:42 | BAndiT1983 | So, what are your questions? I'm on my mobile, because not at home, but can still reply
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| 15:44 | xeechou | OCLauncher is the right application to open?
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| 15:45 | BAndiT1983 | At the moment no, OC backup or processing test are more advanced
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| 15:45 | BAndiT1983 | You should try to load a DNG file in processing test
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| 15:45 | BAndiT1983 | I deactivated DNG in ocbackup because of some tests
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| 15:46 | xeechou | It takes arguments?
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| 15:46 | xeechou | The program ProcessingTree?
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| 15:46 | BAndiT1983 | No, all applications start without
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| 15:47 | BAndiT1983 | But look into processing presenter class to see loading routines for images
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| 15:50 | xeechou | Yeah, from the output of program, it seems to try to load /media/Andi/OC_TEST_DISK2/darklab.mov
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| 15:51 | BAndiT1983 | It is a test for video player in backup
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| 15:51 | BAndiT1983 | Take processing test as base for now
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| 15:52 | BAndiT1983 | Test files can be found here https://www.apertus.org/de/node/439
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| 15:53 | BAndiT1983 | DNG are important for now
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| 15:54 | xeechou | Oh, btw, I cloned the main branch, I am not sure if we are talking about the same branch
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| 15:55 | BAndiT1983 | Yes, Master was updated to the state of dev branch
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| 15:55 | BAndiT1983 | I wasn't doing anything yet, as gsoc was approaching so I waited
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| 16:01 | xeechou | Okay, I need to leave a bit now, trying dng files before coming back
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| 22:32 | Roopal08 | Hey <BAndiT1983>, are you there ??
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| 23:01 | aombk2 | very nice team talk
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| 23:16 | atoav | liked it too
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| 23:17 | RexOrCine[m] | Roopal08 - If you have specific questions the best idea is to ask them as the chat logs are routinely checked.
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| 23:18 | RexOrCine[m] | I'm sure Bandit would do his best to answer them when he comes online
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