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9th March 2013
#1
Lives for gear

🎧 15 years
Josephson C700S - clips and comments

A new Josephson C700S surround microphone has arrived and I will eventually post some three channel clips and stereo mixes. Other GS members are encouraged to also post C700S clips from captures they've made with theirs.

The microphone Data Sheet is here. The User Guide is attached below.

I'm excited to see how well this mic images a soundstage in stereo and eager to learn how to mix its native 3 channel Ambisonic B-format signals:
W = omni
X = front/rear fig-8
Y = left/right fig-8
Physical: The mic body is 30cm long (11.81 inches). A shock mount is internal. A 12' 7-wire Mogami cable is attached to the body and a breakout pigtail is supplied, converting the 7-wire end to 3 XLR connectors - all Neutrik. It all comes in a top quality Pelican hard case with Josephson logo on the lid.

Processing to Stereo
For MS processing, Y is the side channel. The mid channel is either W (omni) or X (fig-8), or they can be mixed together to produce any cardioid pattern from narrow to wide. A crossed Blumlein can be realized very simply just by placing the mic that way, or an equivalent can be derived in a mixer or DAW, though I don't understand yet how to do that or so many other things this technique is capable of.

With graphical controls that may make coincident post processing easier, the Harpex Plug-in can also synthesize the effect of several familiar non-coincident array types from the microphone's three channels. You just put Harpex Plug-in on a 3ch poly track. Supported arrays are:
XY: Coincident cardioid microphones at 90° angle
Blumlein: Coincident figure-of-eight microphones at 90° angle
AB: Spaced omnidirectional microphones
ORTF: Spaced (17 cm) cardioid microphones at 110° angle
DIN: Spaced (20 cm) cardioid microphones at 90° angle
NOS: Spaced (30 cm) cardioid microphones at 90° angle
ADDED: Four audio clips. The baroque period orchestra and choir were captured with the C700S (85%) and flank mics (15%). Vocal spot was Schoeps M/S. Chain was DAV BG preamp > Mytek ADC. Mixed w some subtractive EQ and mastered with Elephant and .5dB"air" boost at 27K. All the ambiance is natural; hall RT is >4 seconds.

August 12, 2013: Added Faure clip 1 below. Also a longer clip of a different movement here, Faure clip 2. Both recorded with one C700S, 2 Gordon Model 5 micamps and Mytek ADC.

Photos courtesy of my talented friend and colleague, Bob Powell.
Attached Thumbnails

Attached Files
srs7ug.pdf (100.6 KB, 493 views)

Clip01.wav (8.66 MB, 5889 views)

Clip03.wav (7.89 MB, 5400 views)

Clip02.wav (8.62 MB, 5144 views)

Clip04.wav (9.00 MB, 4977 views)

Faure clip 1.wav (9.50 MB, 5406 views)

Last edited by MichaelPatrick; 20th May 2013 at 06:31 AM.. Reason: added 4 audio clips
9th March 2013
#2
Lives for gear

🎧 15 years
Thanks, looking forward to hearing the samples. Especially how you mix it's "soundstage in stereo image". What preamps are you using?
David Josephson is a champion in my book. We are fortunate that high-level gear is still being made in this world of cheapness.
9th March 2013 | Show parent
#3
Lives for gear

🎧 15 years
Quote:
Originally Posted by surflounge ➡️
What preamps are you using?
Good question. I added this info to my opening post.

Quote:
Originally Posted by surflounge ➡️
David Josephson is a champion in my book. We are fortunate that high-level gear is still being made in this world of cheapness.
100%

Josephson is one of the best microphone makers in the world. Their engineering is passionate, like the old Neumann/Gefell company, but with updated designs and state-of-the-art industrial techniques. They've achieved excellent production consistency equal to B&K, Schoeps, Gefell and the like, and every mic they make is unique or a best in class. I don't know any other manufacturers who make a native B-format microphone. It's a brilliant and simple idea executed beautifully.
9th March 2013 | Show parent
#4
Deleted User
Guest
Quote:
Originally Posted by MichaelPatrick ➡️
.....I don't know any other people, for example, who make a native B-format microphone. It's simply a brilliant idea executed beautifully.
(Calrec) Soundfield? Did they not work out the design of Gerson into a practical working system in the mid seventees?
9th March 2013
#5
Lives for gear

🎧 15 years
Quote:
(Calrec) Soundfield? Did they not work out the design of Gerson into a practical working system in the mid seventees?
I imagine you know the Soundfield history better than I do. The theory precedes Josephson, of course, and Soundfield too I believe.

I could be wrong but think Soundfield makes only A-format microphones, albeit with processors.
9th March 2013 | Show parent
#6
Gear Maniac

🎧 10 years
Quote:
(Calrec) Soundfield? Did they not work out the design of Gerson into a practical working system in the mid seventees?
A "native" B-Format mic system will capture B-Format natively, or directly if you prefer: that is the direct output the capsules will be W, X, Y and, possibly, Z.

SoundField microphones outputs A-Format signal: it has to be converted into B-Format. So, AFAIK, the Josephson C700S is the only self-contained native B-Format microphone.
9th March 2013
#7
Lives for gear

1 Review written
🎧 15 years
Michael - From your notes it seems the DS60 would work, too. I can use it in MS mode as a Blumlein MS rig and then copy the front-back channels to two additional tracks and not invert the back channel yielding an omni channel. The tracks would all have to be combined, yielding Front-back Fig8, Left-right Fig8 and omni. But that is just a few minutes in the DAW. The benefit for me would be the stereo options. But, £498 is more than I want to spend, right now. LOL I really think that drug addiction might be cheaper.

We will all be interested in how this Harpex project works for you.
9th March 2013 | Show parent
#8
Deleted User
Guest
Quote:
Originally Posted by Kewl ➡️
A "native" B-Format mic system will capture B-Format natively, or directly if you prefer: that is the direct output the capsules will be W, X, Y and, possibly, Z.

SoundField microphones outputs A-Format signal: it has to be converted into B-Format. So, AFAIK, the Josephson C700S is the only self-contained native B-Format microphone.
What is inside the Josephson? Two figure of eights and one omni capsule? What about the Schoeps Portaflex system?
9th March 2013
#9
Lives for gear

🎧 15 years
Quote:
Originally Posted by boojum
... it seems the DS60 would work, too. I can use it in MS mode as a Blumlein MS rig and then copy the front-back channels to two additional tracks and not invert the back channel yielding an omni channel. The tracks would all have to be combined, yielding Front-back Fig8, Left-right Fig8 and omni. But that is just a few minutes in the DAW. The benefit for me would be the stereo options.
I'd bet you know better than I just how this is done, but it seems that a preparatory 1st step is required to synthesize an W (omni) channel from the two fig-8s. Can you then derive --with a synthetic W channel-- variable cardioid patterns? This is natural and easy with a real pressure omni (W) and fig-8 (X or Y).
10th March 2013
#10
Lives for gear

5 Reviews written
🎧 15 years
Quote:
Originally Posted by Kewl ➡️
A "native" B-Format mic system will capture B-Format natively, or directly if you prefer: that is the direct output the capsules will be W, X, Y and, possibly, Z.

SoundField microphones outputs A-Format signal: it has to be converted into B-Format. So, AFAIK, the Josephson C700S is the only self-contained native B-Format microphone.
Soundfield's less expensive mic does indeed output A format. All the other Soundfield mics are B format mics that output B format AND stereo at the same time. (In either stereo or undecoded m/s)

I am looking forward to the report about the Josephson.

Atelier HudSonic, Chicago
10th March 2013
#11
Lives for gear

🎧 15 years
Quote:
Originally Posted by Plush ➡️
... Soundfield mics are B format mics that output B format AND stereo at the same time. (In either stereo or undecoded m/s)...
Question: Are the capsules physically arrayed to directly output B-format signals or is there a transcoding processor between the mic and the B outputs?
10th March 2013 | Show parent
#12
Lives for gear

1 Review written
🎧 15 years
Quote:
Originally Posted by MichaelPatrick ➡️
I'd bet you know better than I just how this is done, but it seems that a preparatory 1st step is required to synthesize an W (omni) channel from the two fig-8s. Can you then derive --with a synthetic W channel-- variable cardioid patterns? This is natural and easy with a real pressure omni (W) and fig-8 (X or Y).
Michael - The front and back channel together, back to back cards, work as an omni. Reverse the back and there is one figure 8, reverse the right channel and along with the left there is the other figure 8. I suppose I could sum all four for an omni but Pearl says just the opposing two will do it. The software you have mentioned would allow me much variety with the one mic, but it US$750 to get that. I'd have to think about that. We will all be interested in your experiences with Harpex. 10th March 2013 #13 Lives for gear 🎧 15 years Quote: Originally Posted by boojum ➡️ ...The software you have mentioned would allow me much variety with the one mic, but it US$750 to get that. I'd have to think about that.
Having never used it myself, I wouldn't recommend Harpex (yet), but the Player plugin is free. The one with all the advanced surround features costs real money.
10th March 2013
#14
Lives for gear

🎧 10 years
Harpex is absolutely worth the money. Try the demo and I think you'll find the money from somewhere.

Regards,

John
10th March 2013
#15
Lives for gear

🎧 10 years
Quote:
Originally Posted by MichaelThe manual says the Player can emulate these arrays:
[I
XY: Coincident cardioid microphones at 90° angle
Blumlein: Coincident figure-of-eight microphones at 90° angle
AB: Spaced omnidirectional microphones
ORTF: Spaced (17 cm) cardioid microphones at 110° angle
DIN: Spaced (20 cm) cardioid microphones at 90° angle
NOS: Spaced (30 cm) cardioid microphones at 90° angle
[/I]
It should also be able to emulate MS but I do not see how no coincident configurations could be emulated from coincident capsules.
10th March 2013
#16
Lives for gear

🎧 10 years
I might try this with 2 x MKH 30 and a MKH 20.
The omni will mount parallel to the 8s ,hopefully without shadowing
At last ,a reason to buy a SD744/788......

My ancient STC 4033a uses an omni and a ribbon for wide card.
10th March 2013 | Show parent
#17
Deleted User
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Quote:
Originally Posted by boojum ➡️