Sound filter question_ for my solo show
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Posts: 46,084
Hi,
My name is Federico Muelas, I’m an artist working with technology and I’m
having a solo show in Barcelona at the end of the year titled “the sound of
the chocolate smell” where I’m showing my recent installation pieces, you
can check the info of the sound and more extended info about the piece at
www.federicomuelas.com
I Have a problem with one of the pieces named “Dripping Sounds” and I wonder
if anyone have an idea to overcome this problem.
Description of the piece “dripping sounds”
The "dripping machine" and the "sound Screen" are the two apparatus the
installation is comprised of. The first one, constituted by A 0,22 gallons
water container, a lighting and two lenses device, a ink dripping system and
a microcontrolled flushing system, is in charge of the following three
tasks; the optical projection of the enlarged image of the drop branching,
the drops dispensation and the water renovation cycle of the liquid
container where the ink is dripped. The second one translates the moving
image projected over its surface into sound through the 20 photosensitive
independent modules installed in its back face.
The modules, wired individually to 20 speakers encircling the screen, are
distributed in an equidistant grid of five columns by four rows, each row
comprises four elements connected in parallel; three individual modules and
an electronic circuit that provides an exclusive sound. Having the same
natural source, the five different sounds are modified in order to transform
their pitch value, increasing vertically in a range from low frequency in
the lower part of the screen to high in the upper one.
The photocapacitor installed in each module determines the variable
volume of the sound it broadcasts through the speaker.
The quantity of light this device receives is inversely correspondent to the
volume of the wave it emits and viceversa.
Therefore the projected image of the drop, while it is growing and
ascending from bottom to top (due to the image vertical flipping due to the
combination of two concave lenses), activates the sensors installed over the
screen and produces a sound that goes from low to high frequency values.
Description of the circuit I have problems with in the piece:
-A 20 seconds sound recording circuit sends a sound signal to a 1-watt
amplifier.
-The signal input of the 1-watt amplifier is connected to a photocell
connected to ground that increases or decreases the incoming sound signal
depending on the light it receiving.
-The 1-watt amplifier is connected to a speaker that emits the sound
Description of the problem:
-Supposedly the volume of the sound emitted by the speaker should be
inversely proportional to intensity of light reaching the photocell.
-Therefore when the photocell is receiving light the speaker shouldn’t emit
any sound, but this doesn’t happen, there is always a sound in the
background and since there are in the piece 20 of these circuits the sound
is really annoying.
The solution I’m looking for:
_What I need is to “cut” any sound emitted by the speaker under a
determinate volume threshold, let’s say under 18 dB.
I would really appreciate any suggestion, you can e-mail me at
d2ec@h...
Thanks a lot.
Federico Muelas
_________________________________________________________________
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My name is Federico Muelas, I’m an artist working with technology and I’m
having a solo show in Barcelona at the end of the year titled “the sound of
the chocolate smell” where I’m showing my recent installation pieces, you
can check the info of the sound and more extended info about the piece at
www.federicomuelas.com
I Have a problem with one of the pieces named “Dripping Sounds” and I wonder
if anyone have an idea to overcome this problem.
Description of the piece “dripping sounds”
The "dripping machine" and the "sound Screen" are the two apparatus the
installation is comprised of. The first one, constituted by A 0,22 gallons
water container, a lighting and two lenses device, a ink dripping system and
a microcontrolled flushing system, is in charge of the following three
tasks; the optical projection of the enlarged image of the drop branching,
the drops dispensation and the water renovation cycle of the liquid
container where the ink is dripped. The second one translates the moving
image projected over its surface into sound through the 20 photosensitive
independent modules installed in its back face.
The modules, wired individually to 20 speakers encircling the screen, are
distributed in an equidistant grid of five columns by four rows, each row
comprises four elements connected in parallel; three individual modules and
an electronic circuit that provides an exclusive sound. Having the same
natural source, the five different sounds are modified in order to transform
their pitch value, increasing vertically in a range from low frequency in
the lower part of the screen to high in the upper one.
The photocapacitor installed in each module determines the variable
volume of the sound it broadcasts through the speaker.
The quantity of light this device receives is inversely correspondent to the
volume of the wave it emits and viceversa.
Therefore the projected image of the drop, while it is growing and
ascending from bottom to top (due to the image vertical flipping due to the
combination of two concave lenses), activates the sensors installed over the
screen and produces a sound that goes from low to high frequency values.
Description of the circuit I have problems with in the piece:
-A 20 seconds sound recording circuit sends a sound signal to a 1-watt
amplifier.
-The signal input of the 1-watt amplifier is connected to a photocell
connected to ground that increases or decreases the incoming sound signal
depending on the light it receiving.
-The 1-watt amplifier is connected to a speaker that emits the sound
Description of the problem:
-Supposedly the volume of the sound emitted by the speaker should be
inversely proportional to intensity of light reaching the photocell.
-Therefore when the photocell is receiving light the speaker shouldn’t emit
any sound, but this doesn’t happen, there is always a sound in the
background and since there are in the piece 20 of these circuits the sound
is really annoying.
The solution I’m looking for:
_What I need is to “cut” any sound emitted by the speaker under a
determinate volume threshold, let’s say under 18 dB.
I would really appreciate any suggestion, you can e-mail me at
d2ec@h...
Thanks a lot.
Federico Muelas
_________________________________________________________________
Add photos to your e-mail with MSN 8. Get 2 months FREE*.
http://join.msn.com/?page=features/featuredemail
Comments
We use gates in our studios to reduce air conditioning and computer
noise through the microphones when our disc jockeys aren't talking.
This circuit shouldn't be hard to design using some op-amps in a class-c
mode or perhaps some schottky diodes. If you're looking for a
prepackaged solution RDL has many different "stick-on" solutions that
might suit your needs http://www.rdlnet.com/stgla1.htm
I hope this helps,
Dave
David Casey
dtcasey@c...
Original Message
From: D2 equipo creativo [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=0FtxfpEVEzQCOFXZnJJbrTkWpF7-C2sXmEq52_kcyVCmt3_-AwEtAFxvUrxEPJwP_YfFDxhandCy]d2ec@h...[/url
Sent: Saturday, September 27, 2003 10:37 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Sound filter question_ for my solo show
Hi,
My name is Federico Muelas, I'm an artist working with technology and
I'm
having a solo show in Barcelona at the end of the year titled "the sound
of
the chocolate smell" where I'm showing my recent installation pieces,
you
can check the info of the sound and more extended info about the piece
at
www.federicomuelas.com
I Have a problem with one of the pieces named "Dripping Sounds" and I
wonder
if anyone have an idea to overcome this problem.
Description of the piece "dripping sounds"
The "dripping machine" and the "sound Screen" are the two apparatus the
installation is comprised of. The first one, constituted by A 0,22
gallons
water container, a lighting and two lenses device, a ink dripping system
and
a microcontrolled flushing system, is in charge of the following three
tasks; the optical projection of the enlarged image of the drop
branching,
the drops dispensation and the water renovation cycle of the liquid
container where the ink is dripped. The second one translates the
moving
image projected over its surface into sound through the 20
photosensitive
independent modules installed in its back face.
The modules, wired individually to 20 speakers encircling the screen,
are
distributed in an equidistant grid of five columns by four rows, each
row
comprises four elements connected in parallel; three individual modules
and
an electronic circuit that provides an exclusive sound. Having the same
natural source, the five different sounds are modified in order to
transform
their pitch value, increasing vertically in a range from low frequency
in
the lower part of the screen to high in the upper one.
The photocapacitor installed in each module determines the variable
volume of the sound it broadcasts through the speaker.
The quantity of light this device receives is inversely correspondent to
the
volume of the wave it emits and viceversa.
Therefore the projected image of the drop, while it is growing and
ascending from bottom to top (due to the image vertical flipping due to
the
combination of two concave lenses), activates the sensors installed over
the
screen and produces a sound that goes from low to high frequency values.
Description of the circuit I have problems with in the piece:
-A 20 seconds sound recording circuit sends a sound signal to a 1-watt
amplifier.
-The signal input of the 1-watt amplifier is connected to a photocell
connected to ground that increases or decreases the incoming sound
signal
depending on the light it receiving.
-The 1-watt amplifier is connected to a speaker that emits the sound
Description of the problem:
-Supposedly the volume of the sound emitted by the speaker should be
inversely proportional to intensity of light reaching the photocell.
-Therefore when the photocell is receiving light the speaker shouldn't
emit
any sound, but this doesn't happen, there is always a sound in the
background and since there are in the piece 20 of these circuits the
sound
is really annoying.
The solution I'm looking for:
_What I need is to "cut" any sound emitted by the speaker under a
determinate volume threshold, let's say under 18 dB.
I would really appreciate any suggestion, you can e-mail me at
d2ec@h...
Thanks a lot.
Federico Muelas
_________________________________________________________________
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bunch of reed relays under some sort of remote control, but I assume you
just want the noise to go away until the drip event occurs. In that case a
bank of gates set to trigger on just above the nominal noise threshold is a
good way to go. Typically, these work by using a VCA (Voltage Controlled
Amplifier) under some sort of hysteresis enabled trigger (so it doesn't
jitter on and off for mid-level signals). Of course, you can do this with a
bunch of analog circuits, but if you had the budget and/or gear, many audio
mixing programs exist that will easily do this on a Mac or PC such as
Steinberg Nuendo/Cubase, Digital Performer, MaxTracks, etc. If you already
have 16 inputs and 16 outputs from your PC or Mac, it would be simple. Of
course, if you have to purchase this gear, it would be an expensive
solution. Can you borrow this to try.
I don't think there's enough horsepower in a BS2 to operate on the audio
directly, but it could probably sense the level of the 16 inputs and decide
when to open the proper relays or VCAs. Has anyone in the group done
anything like this?
Mike Sokol
www.modernrecording.com
mikes@m...
" One should not increase, beyond what is necessary,
the number of entities required to explain anything"...
-William of Occam-
Original Message
From: "Dave Casey" <dtcasey@c...>
To: <basicstamps@yahoogroups.com>; <d2ec@h...>
Sent: Saturday, September 27, 2003 5:04 PM
Subject: RE: [noparse][[/noparse]basicstamps] Sound filter question_ for my solo show
> In the world of audio, this piece of equipment is called a noise gate.
> We use gates in our studios to reduce air conditioning and computer
> noise through the microphones when our disc jockeys aren't talking.
> This circuit shouldn't be hard to design using some op-amps in a class-c
> mode or perhaps some schottky diodes. If you're looking for a
> prepackaged solution RDL has many different "stick-on" solutions that
> might suit your needs http://www.rdlnet.com/stgla1.htm
>
> I hope this helps,
> Dave
>
> David Casey
> dtcasey@c...
>
Original Message
> From: D2 equipo creativo [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=rrZWii7wdiANUPv8YcaWqpMuTdcb-5u6yZN9xbfsjqRktP8X9RYzBrPDw3DV-O9DShbPWO8zXlr9HBs]d2ec@h...[/url
> Sent: Saturday, September 27, 2003 10:37 AM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Sound filter question_ for my solo show
>
> Hi,
> My name is Federico Muelas, I'm an artist working with technology and
> I'm
> having a solo show in Barcelona at the end of the year titled "the sound
> of
> the chocolate smell" where I'm showing my recent installation pieces,
> you
> can check the info of the sound and more extended info about the piece
> at
> www.federicomuelas.com
>
> I Have a problem with one of the pieces named "Dripping Sounds" and I
> wonder
> if anyone have an idea to overcome this problem.
>
> Description of the piece "dripping sounds"
>
> The "dripping machine" and the "sound Screen" are the two apparatus the
> installation is comprised of. The first one, constituted by A 0,22
> gallons
> water container, a lighting and two lenses device, a ink dripping system
> and
> a microcontrolled flushing system, is in charge of the following three
> tasks; the optical projection of the enlarged image of the drop
> branching,
> the drops dispensation and the water renovation cycle of the liquid
> container where the ink is dripped. The second one translates the
> moving
> image projected over its surface into sound through the 20
> photosensitive
> independent modules installed in its back face.
>
> The modules, wired individually to 20 speakers encircling the screen,
> are
> distributed in an equidistant grid of five columns by four rows, each
> row
> comprises four elements connected in parallel; three individual modules
> and
> an electronic circuit that provides an exclusive sound. Having the same
> natural source, the five different sounds are modified in order to
> transform
> their pitch value, increasing vertically in a range from low frequency
> in
> the lower part of the screen to high in the upper one.
>
> The photocapacitor installed in each module determines the variable
> volume of the sound it broadcasts through the speaker.
> The quantity of light this device receives is inversely correspondent to
> the
> volume of the wave it emits and viceversa.
>
> Therefore the projected image of the drop, while it is growing and
> ascending from bottom to top (due to the image vertical flipping due to
> the
> combination of two concave lenses), activates the sensors installed over
> the
> screen and produces a sound that goes from low to high frequency values.
>
> Description of the circuit I have problems with in the piece:
>
> -A 20 seconds sound recording circuit sends a sound signal to a 1-watt
> amplifier.
> -The signal input of the 1-watt amplifier is connected to a photocell
> connected to ground that increases or decreases the incoming sound
> signal
> depending on the light it receiving.
> -The 1-watt amplifier is connected to a speaker that emits the sound
>
> Description of the problem:
> -Supposedly the volume of the sound emitted by the speaker should be
> inversely proportional to intensity of light reaching the photocell.
> -Therefore when the photocell is receiving light the speaker shouldn't
> emit
> any sound, but this doesn't happen, there is always a sound in the
> background and since there are in the piece 20 of these circuits the
> sound
> is really annoying.
>
> The solution I'm looking for:
> _What I need is to "cut" any sound emitted by the speaker under a
> determinate volume threshold, let's say under 18 dB.
>
> I would really appreciate any suggestion, you can e-mail me at
> d2ec@h...
>
> Thanks a lot.
>
> Federico Muelas
>
> _________________________________________________________________
> Add photos to your e-mail with MSN 8. Get 2 months FREE*.
> http://join.msn.com/?page=features/featuredemail
>
>
>
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