i would try and use circular multipole connectors - you have to get it right only once. for 1st order, unbalanced, a five pin xlr works fine. balanced is ten wires (one wire to provide dc power). i have a working first order native B-format mic with a quad opamp doing the signal conversion (from six cardioids). the electronics is now in a box, and i am trying to see if i can fit it into the zoom H2, with a piggyback nine volt battery. umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar > Date: Sun, 6 Mar 2011 07:38:42 +0000 > From: [email protected] > To: [email protected] > Subject: Re: [Sursound] Ambisonics symposium 2011: was help with links ... > > On Mar 6 2011, Eric Benjamin wrote: > > > In a case such as the FA101 I'd be very tempted to make an internal > > conversion to a 10-channel (analog) interface. I'm not at all sure what > > the internal structure is like for the FA101. > > So would I and that's probably what I will do when I need it :-). The main > problem with the FA101 is that it's panels are _very_ crowded so it would > be difficult to fit more sockets (not impossible, but difficult). From what > I remember from my post-purchase "let's see what we got in here" look at > it, it uses one of the eight channel + spdif digital interface chips with > four stereo codecs, rather than 5 USBUARTS - damned if I can remember the > part number. It's at work at present so I can't check. > > It's being as part of a really wacky rig that we've set up experimentally > to see if an installation we've been asked to look into would actually > work. I'll post something later in the week because I suspect that, like > me, most people would think this distorted weirdo of a rig simply wouldn't > work - but it does, and very well - so much so that it's beginning to make > me wonder if the holy grail of a regular rig may actually be counter > productive! > > > So, yes, I'm planning on having B-format available directly. > > I'd rather record B-format since B-format is what I intend to use. One > > can make the argument for recording A-format because it's possible that > > some new information's or philosophy may become available such that a > > better conversion can be made at a later time. > > These days I would also argue that it's a good think because it also > involves (and, as a hardware guy from way, way back the following statement > may seem strange) far less building of hardware. With A format you just > need a preamp with good gain tracking - maybe not even that with a good > audio interface. With B Format you are into a whole bunch of analogue > electronics with trimmers and general stuff. Much more work which soaks up > valuable recording and playing (in both senses) time. > > > However, for me it's > > mostly worked to my disadvantage. I just made an A-format recording using > > the DPA-4 rig, and son of a gun if I didn't screw it up again. Which > > capsule was the first one? Is this set of files the ones before the EQ or > > after the EQ? Of course those same sorts of problems can occur if it's > > B-format that is being recorded. > > > > Hmm, seems to me the solution is to forget separate XLR's or jacks or > whatever and go for multiway connectors, at least to your preamp box, so's > it's always the same. If you have to build hardware I would always say > include a test oscillator - but don't do it in analogue, use a micro and > have it announce the channel id's, so even if the XLR's into the recorder > get mixed up, there will be an id on each channel in the file - saves > having to tap on the capsules one by one and physically announce them. So, > yeah, A format for me these days, if the choice is available. > > > Dave > > > _______________________________________________ > Sursound mailing list > [email protected] > https://mail.music.vt.edu/mailman/listinfo/sursound -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20110306/52866c15/attachment.html> _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
