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Old 03-07-2018, 05:57 PM   #41
junh1024
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Side note.. Any advice on on decoding ambisonics without buying the official dolby decoder. Looking for a digital solution to go with my speakers.

The height speakers will also be nice for ambisonics too!
Not sure dolby has ambi decoders.

ATK has decoders. Also https://www.york.ac.uk/sadie-project/ambidec.html to be used with http://www.matthiaskronlachner.com/?p=2015
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Old 03-08-2018, 12:54 AM   #42
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Considering the microphones, you could take a look at the Zylia :
http://www.zylia.co/

I have one, together with an Ambeo and a Brahma (I had a Tetramic too but it was too noisy), and the 3rd order decoding makes a real improvement, even if the mic quality itself is behind the Ambeo (but the price too !).

Being able to do the recording with a lightweight tablet is also a nice alternative to an expensive recorder...
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Old 03-08-2018, 03:30 AM   #43
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Just to say. I've got a guy in the UK who is making his first 2nd order mic (but he makes other custom mics for sale too so he knows his stuff!)

He should be done with calibration and decoding software etc on it in the next few weeks.

I'll let you guys know how it went (when I have it in my hands) and if he's up for making more then I'll pass on his details I can't say price yet as this was a bit cheaper than he might sell them for normally but will say that the zoom f8 and the mic was definitely worth getting over say the sennheiser mic!

Got a zoom f8 to go with it as the sound devices only had 4 ins and the zoom can Gang all 8 ins. It's also as quiet as the sound devices we have so win win!

Will do a review once I have it.

Side note.. Any advice on on decoding ambisonics without buying the official dolby decoder. Looking for a digital solution to go with my speakers.

The height speakers will also be nice for ambisonics too!
I'm definitely interested in keeping up with the progress of this mic.

Regarding Ambi decoding, along with the ATK decoders, there's also the free ones in the Blue Ripple Core suite (although they are horizontal only and don't decode height).
Google the Bruce Wiggins decoders too. He has a variety of different decoders for free which are quite good.
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Old 03-08-2018, 03:34 AM   #44
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Originally Posted by jm duchenne View Post
Considering the microphones, you could take a look at the Zylia :
http://www.zylia.co/

I have one, together with an Ambeo and a Brahma (I had a Tetramic too but it was too noisy), and the 3rd order decoding makes a real improvement, even if the mic quality itself is behind the Ambeo (but the price too !).

Being able to do the recording with a lightweight tablet is also a nice alternative to an expensive recorder...
I've been keeping up with the progress of this since their early crowd funding days. I've been in touch with their team too.
The thing holding me back is the necessity of a computer of some sort for recording. A fair part of my Ambi recording is location work and I'm after something that will work with my 744T recorder.

Your experience with the noise of the Tetramic is one of the things that held me back from purchasing one.
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Old 03-08-2018, 06:35 AM   #45
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Sorry guys, I meant to say "atmos" decoding rather than Ambisonics. Got Ambisonics stuff sorted (thanks to this thread!) but the dolby atmos stuff is a pain for sure.

Will probably leave atmos decoding till a company needs it and then I'll buy the proper decoder (sigh, hate giving money to dolby!)

ReaDave.. Will let you know how the mic goes.
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Old 03-08-2018, 09:25 AM   #46
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Originally Posted by musicbynumbers View Post
Sorry guys, I meant to say "atmos" decoding rather than Ambiesonics. Got Ambisonics stuff sorted (thanks to this thread!) but the dolby atmos stuff is a pain for sure.

Will probably leave atmos decoding till a company needs it and then I'll buy the proper decoder (sigh, hate giving money to dolby!)

ReaDave.. Will let you know how the mic goes.
Thanks regarding the mic.

Regarding Atmos, the Blue Ripple Decoder suite contains a decoder for creating Atmos beds from third order Ambisonics but I don't know of any decoders for full Atmos aside from what Dolby themselves offer.

Edit - the Blue Ripple Upmixer suite also contains Atmos bed upmixers to insert Atmos beds into Ambisonic mixes. I have both of these suite and, while not cheap, they are by far the best Ambisonic tools I have.

More details here.... http://www.blueripplesound.com/story/new-712-support

Last edited by ReaDave; 03-08-2018 at 09:33 AM.
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Old 03-08-2018, 04:06 PM   #47
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@m consumer & @m pro are 2 separate codecs (inb4 it's not a codec)

If you don't mind only 7.1 for @tmos c, eac3to can do that for free. For full 3D decoding, mightaswell but a 3D AVR & record that. There may be some dev-only or non-public tools for disassembly of @c streams.

@m pro: Not sure if any Dolby suites have pro decoders, but it's not meant to be disassembled/decoded. Not sure if it has bitstream tools (DTS:X ES does). Again, you can buy pro theatre decoders but those are very expensive.
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Old 03-09-2018, 03:33 AM   #48
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Thanks guys for the info!

I think it's the "object" part of atmos that is the pain in the ass.

I've got it on good authority that quite a lot of mixers still treat atmos as just 7.1 with the overheads (so just as an atmos "bed") and don't bother with objects.

That suites me just fine
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Old 03-09-2018, 06:06 AM   #49
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There are ambi mics popping up allover the place. The absolute low budget winner is the Twirling 720 Microphone, around 160$. It has a peculiar stereo looking output. 2 channels @96 kHz, but the 4 channel info @ 48 kHz is present, interleaved, so it needs it's own software decoder.

http://yun.twirlingvr.com/index.php/...e/lite-en.html

There's also the Oktava MK4012 classic first order 4 channel mic. 799 €. Limited edition.

http://www.oktava-shop.com/Small-and...012-01-12.html

And no, I don't own one

Yet.

Thinking of building a simple electret one. If I can find the time
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Old 03-09-2018, 03:04 PM   #50
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Thanks guys for the info!

I think it's the "object" part of atmos that is the pain in the ass.
Only if u don;t have an @m obj panner (aka Nuendo/PT)

)[/QUOTE]
Quote:

I've got it on good authority that quite a lot of mixers still treat atmos as just 7.1 with the overheads (so just as an atmos "bed") and don't bother with objects.

That suites me just fine
There's 2 types of @M tracks: base & obj. BTW, speakers are objs too (they consume 10o of the 128o limit)
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Old 07-04-2019, 06:01 PM   #51
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There's also the Oktava MK4012 classic first order 4 channel mic. 799 €. Limited edition.
I think that price is without capsules. Budget nearly another €500 for capsules!

I do have an Oktava Ambisonic mic, the old MK-012 4D version. I got it relatively cheap on eBay about 8 or 10 years ago from someone who couldn't use it. The sphere encompassing the capsules is about 98 mm diameter, which makes for poor directional resolution even down to relatively 'mid' frequencies. I have not seen how big the current model is; it might be better (smaller) - can't easily tell from photos on the website; it can't be very small, given the fairly large size of MK-012 capsules.

An issue with the early MK-012 4D is that it uses a non standard Ambisonic layout - effectively turned 90 degrees; I think the DPA Amnisonic mic is the same. Also, it /really/ benefits from being properly calibrated, to compensate a little for the large array size.

All that said, the sound from the Oktava capsules is lovely for classical music, whether choral or orchestral. I still occasionally use it , when directional cues are not so important. But mostly I use a Brahma, for it's better directional resolving power.
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Old 07-04-2019, 07:57 PM   #52
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Wow that first order ?usb mic is cheap. I believe there are first order mic plans out there.. I will dig deeper when not on the phone..

But really from what Ive heard on headphones, it seems like 1st order mics are just good for ambiance.. while the 3rd and higher can give great resolution. I wish I could build my own Eigenmike. The plan is to find a university that has them for use..
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