i think there are a few indian musicians who have an absolute pitch sense.
indian musicians set their pitch before each performance (apart from a few
instruments like the veena where it is fixed) so it is possible that the
existence of an absolute pitch sense has no relationship to the setting
as a location sound mixer, i exploited the visual reinforcement of sound in
many situations. if you are recording half a dozen people speaking, and the
camera focus on one - provided the sound is in synch - the person in picture
will sound louder, nearer the mic, than the others. it is a surpri
ut a write up on how to derive those at:
>
> http://www.ai.sri.com/ajh/ambisonics/umashankar_velan.html
>
> --
> Aaron (hel...@ai.sri.com)
> Menlo Park, CA US
>
>
> On Sat, May 26, 2012 at 12:41 PM, umashankar mantravadi
> wrote:
> >
> > assuming all si
assuming all six capsules have same gain, and all are contributing to W, how
much should be the attenuation? umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> Date: Sat, 26 May 2012 18:25:04 +0200
> From: netti...@stackingdwarves.net
> To: sursound@music
dear augustine
x y and z represent three figure of eight microphones. the way to generate a
figure of eight microphone out of two opposed cardioids is to invert the phase
of one, and sum them.
umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> Date
for me, this is where ambisonics (or surround sound) really comes in. we have
been recording dry (even with blumlein) and hoping the speakers at home will
create enough 'ambience' of some kind. one reason we are forced to do this is
because in the real world reverberation is three dimensional;
that is a question i had been meaning to ask. can a tetrahedral mic be used to
create a room (correction) impulse response in B format? and how? umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> From: rica...@justnet.com.au
> To: sursound@music.vt.edu
>
folks i just looked out of my window and it is 1975! Wireless World gave up
waiting for the third part of MAG's article and started publishing somebody
called Ivor Catt, who wanted to fight Maxwell in single combat. umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/u
well, i always thought first order b format as a natural extension of blumlein.
one immediate result i noticed first time i managed to play a recording with
eight loudspeakers was how little work the speakers to had to do to produce a
rich full bodied sound in my (somewhat small). the speakers
for me, ambisonics (or a soundfield microphone) is the tool to use for acoustic
measurements, to archive the sound of spaces as they exist before they get torn
down, burnt or modified into shopping malls. but then, i got into ambisonics
through attempts to measure the acoustics of ancient archa
dear hector just listened to the recordings, they sound great. on my Sony MDR
V6 headphones, i did not hear the front back reversal. umashankar
> From: hcen...@gmail.com
> Date: Thu, 12 Jan 2012 18:52:14 -0500
> To: sursound@music.vt.edu
> Subject: Re: [Sursound] Ambisonic-Binaural piece using
incredible it even uses the word 'sound field' umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> Date: Wed, 21 Dec 2011 10:59:24 +
> From: dave.mal...@york.ac.uk
> To: sursound@music.vt.edu
> Subject: Re: [Sursound] Nowt new under t'sun
>
> And this
dear hector that sounded very good indeed on my sony mdr5 headphones. did you
record with brahma? umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> Date: Sun, 4 Dec 2011 21:40:26 -0600
> To: sursound@music.vt.edu
> From: d...@fugato.com
> Subject: Re: [S
brahmavolver is a standalone program, not a vst plug in. or so i thought/ (i
have version .71 for windows with me)umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> Date: Wed, 12 Oct 2011 14:58:40 -0700
> From: hel...@ai.sri.com
> To: sursound@music.vt.e
i forgotten how, but in school, we use to make very annoying clickers out of
pieces of photofilm. even if i can remember how to make it, where will i find
photofilm? umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> Date: Mon, 10 Oct 2011 11:49:11 +0100
yes speech is best (the only negative going sound we can make is om, which
should be said while breathing in. umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> From: geoffreybar...@mac.com
> Date: Mon, 10 Oct 2011 10:13:58 +0100
> To: sursound@music.vt.e
when i was a child my grandaunt told me the story of a demon who lived in old
banyan tree. he would swoop down on unwary travellers, but the travellers
always ran away. one day, one traveller could not run, and the demon stopped
him. he said, sit down under the tree, and learn everything i know
just read about this in the asa newsletter. anyone knows anything about it?
http://www.visisonics.com/Products/AudioCamera.html umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
-- next part --
mass production will not happen so easily, but if you dont count your computer
in the cost, 200 dollars for first order, without height is very possible.
there are many 7.1 channel cards, some of them on usb, which are based on an
eight channel d-a convertor. if you ignore the software provided
going to order one and see. umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> From: b...@mit.edu
> Date: Sat, 30 Jul 2011 00:07:12 -0400
> To: sursound@music.vt.edu
> Subject: Re: [Sursound] Ambisonics on the cheap?
>
> Has anyone tried anything from ES
order to 'get the f*** outa there'.
> >>
> >> The phenomena can be reversed, or at least alleviated from a 3rd person
> >> perspective, by plugging the cables into a live mains socket and biting
> >> hard on the other end.
> >>
> >>Dav
t; -of-thumb present no more than 5% of the impedance load presented by the
> speaker, and hence the ONLY real issue of concern is the resistance of the
> selected wire per foot. The speakers I use most often have a rated impedance
> of 4 Ohms, hence we do not want to see a DC resistan
mb present no more than 5% of the impedance load presented by the
> speaker, and hence the ONLY real issue of concern is the resistance of the
> selected wire per foot. The speakers I use most often have a rated impedance
> of 4 Ohms, hence we do not want to see a DC resistance greater tha
my favourite visual image is of a boeing 747. it always seems to fly so slow.
we seem to have, in our brains, a 'size' for aircraft, so we can use that to
compute speed from angular momentum. so small aircraft wiz by and big ones
lumber. what models do we create for sound objects? umashankar
i
years ago (no decades ago) i found what a huge difference it made if the wires
were reasonably thick, and cut to be exactly same length. cutting them to same
length is problematic with eight loudspeakers (unless the amp sits in the sweet
spot) but my next rig, in my own house, in bangalore next
dear all i am the person who makes brahma microphones. the photographs and
description on the oomagamma site are of one early version. the capsules are
cardioid 14 mm, mounted on a drilled out sphere. (it was not very successful.)
while oomagamma sells some of the microphones i had made, brahma
umashankar mantravadi shared the folder brahma 140 with you on Windows Live.
<http://profile.live.com/cid-3aeeea022e2ad294?Bsrc=EMSHOO&Bpub=SN.Notifications>
"here are the two recordings by hector i intended to send"
View folder
<http://skydrive.live.com/redir.aspx?ci
umashankar mantravadi shared the folder ambisonics with you on Windows Live.
<http://profile.live.com/cid-3aeeea022e2ad294?Bsrc=EMSHOO&Bpub=SN.Notifications>
"here are to B format recordings (four wave files each) recorded and processed
by hector centano. using the brahma 140
just a thought (please shoot me down if i am talking air). all the microphones
we currently use (except for some cell phone microphones, according to the
patents) are first order microphones the patterns just a combination of omni
and figure of eight in various ratios. there are various second
i would agree with that (arent there too many wires already?) but i found a
cheaper solution in chinese made digital amplifier cards. 50 dollars including
shipping for four channels! you need to build a box etc of course. there are
switched mode power supplies too. (search for sure electronics
dear eric the way i marked out my holes is this: draw three great circles, 120
degrees apart. the point they crosss at is the first microphone. you then mark
240 degrees on each great circle and drill for the other three. i drilled the
holes through the sphere so the wires could be threaded out
years ago i had asked (several times) this same question and never got a
satisfactory answer. i thought of two alternate systems. one where the sphere
is about seven or eight inches across, and the other where the sphere is just
large enough(about an inch) to mount the capsules. never tried to
some months ago i acquired a battered motor cycle helmet. the aim is to mount
eight loudspeakers ; remove the foam but leave the helmet suspension intact, so
it is a few inches off the head in all directions. feed a standard cube decode.
havent tried it yet. distracted by a loudspeaker cube!
dear paul
i got your message. in fact i thought i had replied.sorry.
umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> Date: Sun, 22 May 2011 16:29:46 +0100
> From: pwh-surro...@cassland.org
> To: sursound@music.vt.edu; umasha...@hotmail.com
> Sub
they have decided on ambisonics (up there), but are now arguing about whether
3rd order is enough, or if it is natural
umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> From: j...@johnleonard.co.uk
> Date: Sun, 22 May 2011 15:06:25 +0100
> To: surs
ertain.
>
> thanks
> Michael
>
>
> On Wed, May 18, 2011 at 11:19 AM, umashankar mantravadi
> wrote:
> >
> > dear michael
> >
> > i do not mind at all, and would in fact like to hear from people who have
> > used my mic, or heard recordings
dear michael
i do not mind at all, and would in fact like to hear from people who have used
my mic, or heard recordings made with it.
Angelo has ten of them, and a 11th made with TSB 120 capsules which he has
tested and calibrated and used for recordings. i have not heard these
recordings m
transmission line speakers are not difficult to build and i suspect they would
be better for a ambisonic system than reflex speakers, for almost thirty years
now i had a pair of 'miniline' transmission line speakers published in HiFiNews
(and i think designed by P Atkinson) they use KEF B110 an
in fact angelo recommended that i arrange the eight speakers as two crossed
squares. two speakers in front and back, and four speakers mid bottom left and
right and mid top left and right, the only problem is i do not see a readymade
decoder
umashankar
i have published my poems. read (or bu
dear john
just ten minutes ago i finished setting up an eight speaker playback system.
the speakers are small (4inch) in home made boxes. at the moment they hang
flush against the wall near the roof and near the ceiling. it is cube about 10
feet on each side. (slightly less top to bottom)
i
maybe a little unrelated. i just sold a brahma 140 (14 mm capsules) and zoom
modified to a new york film crew. they plan to use the microphone mounted on
the camera. i had been a film sound recordist for 25 years, and even with
stereo, i preferred a stable sound image for a whole scene, without
i have the sabrent. it works very well in windows with asio for all. it is
advertised as 7.1 but has eight identical output channels (you have to watch
out for virtual 7,1 boxes)
i have bult myself an eight channel digiital amplifier using quad cards from
sure electronics (50 usd including sh
it would be nice if somebody put together - created a recipe - with readily
available components which will do one thing only. play four channel Bformat
files through an eight output sound card. just enough controls to set up the
speakers and select files to be played.
it would be nice if it
i always thought that it is impossible to actually know the state of every gate
and shift register in a cpu. so it is not deterministic
umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> Date: Thu, 28 Apr 2011 07:48:22 -0700
> From: gre...@math.ucla.
a very feasible idea. you really dont need transformer balancing (which i think
the PPAs provide). impedance balancing will do it, and any dc 6 volt supply
should work with the tetramic. i built john leonard a box wich provides
stabilisied 5 volts, but i think you might get away without even th
if the radio pick up is happening at the mic head (possible) what you will
need is a metal grill which is earthed. the signal is unbalanced till the ppa
outputs. so it is best to use any extension cables after the point.
umashankar
i have published my poems. read (or buy) at http://stores.lu
this is something i have vaguely worried about when designing multichannel
mikes in one body, and then phantom powering them. in the classic wurtke
circuit, the phantom voltage powers the output transistors, and you need it to
be on for the transistors to work (right?) doesnt the core sound ppa
i am not sure the baby ball gag will work. it is primarily meant for
cylindrical mics like many small diaphragm condensors
umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> Date: Sat, 16 Apr 2011 08:15:07 +0100
> From: dave.mal...@york.ac.uk
> To: s
netti...@stackingdwarves.net
> To: sursound@music.vt.edu
> Subject: Re: [Sursound] NYC-area TetraMic owners? or: advice on a wind-screen
>
> On 04/15/2011 07:00 AM, umashankar mantravadi wrote:
> >
> > at a pinch, you should be able to use the foam windscreens made for sm58
> > styl
at a pinch, you should be able to use the foam windscreens made for sm58 style
microphones
umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> From: jnarve...@wesleyan.edu
> Date: Thu, 14 Apr 2011 23:22:32 -0400
> To: sursound@music.vt.edu
> Subject:
dear hector
is there some way one can access the b format recordings of the birds?
umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> Date: Wed, 6 Apr 2011 18:27:57 -0400
> From: i...@hcenteno.net
> To: sursound@music.vt.edu
> Subject: Re: [Sursound
ST Ambisonic
> Externals
>
> umashankar,
>
> You can install ambdec from the Main KXStudio PPA repository :
> https://launchpad.net/~kxstudio-team
>
> --
> Marc
>
> Le 20 mars 2011, umashankar mantravadi a écrit :
> > has anyone packaged fons ambdec (and ev
has anyone packaged fons ambdec (and even his tetraproc) so i can install it
easily on ubuntu studio?
umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> Date: Sun, 20 Mar 2011 19:11:03 +0100
> From: netti...@stackingdwarves.net
> To: sursound@music.v
i still have that floppy lp (and probably audio too) somewhere
umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> Date: Sun, 13 Mar 2011 20:24:20 -0700
> From: gre...@math.ucla.edu
> To: sursound@music.vt.edu
> Subject: Re: [Sursound] cross-talk canc
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 (fro
to reproduce 2nd order material with-height using a loudspeaker array
> that fits in a normal domestic room.
>
> Eric
>
>
> - Original Message
> From: umashankar mantravadi
> To: sursound@music.vt.edu
> Sent: Fri, March 4, 2011 9:14:10 PM
> Subject: Re: [Surs
dear eric
first question. how many recording channels will it need?
umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> Date: Fri, 4 Mar 2011 20:49:23 -0800
> From: eb...@pacbell.net
> To: sursound@music.vt.edu
> Subject: [Sursound] Ambisonics sympo
i have modified about 15 zoom H2s so far, and have bullt tetrahedral
microphones that plug into the modified zoomz.the modification is quite simple
really, just a way of attaching a five pin connector to the top of the zoom, so
a tetrahedral mic with five pin connector can be plugged in, direct
some years ago i found a whole load of patents on the uspatent site for second
order microphones. mostly for use in cell phones. others for hearing aids. it
would be interesting to revisit the ideas, especially as i am now able to do
very odd shapes using shapeways.
umashankar
i have publis
under the influence! harmony of the spheres ? (I am just reading sleepwalkers)
umashankar
i have published my poems. read (or buy) at http://stores.lulu.com/umashankar
> Date: Fri, 3 Dec 2010 03:30:56 +0200
> From: de...@iki.fi
> To: sursound@music.vt.edu
> Subject: [Sursound] [ot] Repent,
little OT. this is actually a guide to converting the H2
http://www.flickr.com/photos/ms_static/sets/72157625446503232/detail/
umashankar
> Date: Wed, 24 Nov 2010 21:28:32 -0800
> From: flawless.gate...@gmail.com
> To: sursound@music.vt.edu
> Subject: [Sursound] A conversion guide ?
>
> Hi,
umashankar mantravadi shared the folder ambisonics with you on Windows Live.
<http://cid-3aeeea022e2ad294.profile.live.com/?Bsrc=EMSHOO&Bpub=SN.Notifications>
"a few files done with a 6 mm tetrahedron. diwali crackers, but not a very
impressive show."
View folder
<http
well, it is divali here in india next weekend and i am hoping to use my zoom H2
and a brahma with six mm capsules to record the fireworks. they start at sunset
and usually go on past midnight. i also have a working six caspule 'velan'
working, but the electronics may not be ready in time. the n
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