Future project - LED light show on car

[Mariachi]

Okay, I have an idea...

I'm sure everybody has heard of LED's before...
I'm thinking of a future project that consists of LED panels, which
include a linear or a thin array of LEDs that goes across the bottom
of your car.

Each LED would emit a different frequency of light. So say at the
rear of the array you would have red LEDs that emit a wavelength of
700 nm. And towards the front of the array, you would have blue LEDs
that emit a wavelength of 450 nm. If you have 100 LEDs per panel and
2 columns per panel, you would have 50 rows of LEDs... And put one
panel on each side of the car.

So if you had boundaries of 450nm - 700nm, and 50 LEDs per column...
your increment would be 5 nm per LED.

e.g.

450nm 455nm 460nm 465nm 470nm 475nm 480nm 485 nm ... 695nm 700nm

Here's where it becomes interesting...
You can match up sound frequencies with the frequency of light using a
semi-linear relationship

700 nm = 20 Hz
690 nm = 30 Hz
680 nm = 40 Hz
670 nm = 50 Hz
660 nm = 60 Hz
650 nm = 70 Hz
640 nm = 80 Hz
630 nm = 90 Hz
620 nm = 100 Hz
610 nm = 120 Hz
600 nm = 140 Hz
590 nm = 160 Hz
580 nm = 200 Hz
570 nm = 240 Hz
560 nm = 280 Hz
550 nm = 320 Hz
540 nm = 420 Hz
530 nm = 540 Hz
520 nm = 700 Hz
530 nm = 900 Hz
520 nm = 1,200 Hz
510 nm = 2,000 Hz
500 nm = 3,000 Hz
490 nm = 5,000 Hz
480 nm = 8,000 Hz
470 nm = 12,000 Hz
460 nm = 17,000 Hz
450 nm >=20,000 Hz

You can do this two ways... digitally or going be analog filters
(inductors/capacitors)

Digitally, I would use a labtop with a program built with LAB view to
accept incoming sound frequencies and then output to the corresponding
LEDs... And also, the louder the sound gets... the brighter the LEDs
light up...

You can put one LED array on each side for each audio channel...
therefore your left LED array would be in sync with your left audio
channel and vice versa for the right...

Any opinions?

[Mariachi]

On May 30, 7:13 pm, Mariachi <jpgarcia...@hotmail.com> wrote:
> Okay, I have an idea...
>
> I'm sure everybody has heard of LED's before...
> I'm thinking of a future project that consists of LED panels, which
> include a linear or a thin array of LEDs that goes across the bottom
> of your car.
>
> Each LED would emit a different frequency of light. So say at the
> rear of the array you would have red LEDs that emit a wavelength of
> 700 nm. And towards the front of the array, you would have blue LEDs
> that emit a wavelength of 450 nm. If you have 100 LEDs per panel and
> 2 columns per panel, you would have 50 rows of LEDs... And put one
> panel on each side of the car.
>
> So if you had boundaries of 450nm - 700nm, and 50 LEDs per column...
> your increment would be 5 nm per LED.
>
> e.g.
>
> 450nm 455nm 460nm 465nm 470nm 475nm 480nm 485 nm ... 695nm 700nm
>
> Here's where it becomes interesting...
> You can match up sound frequencies with the frequency of light using a
> semi-linear relationship
>
> 700 nm = 20 Hz
> 690 nm = 30 Hz
> 680 nm = 40 Hz
> 670 nm = 50 Hz
> 660 nm = 60 Hz
> 650 nm = 70 Hz
> 640 nm = 80 Hz
> 630 nm = 90 Hz
> 620 nm = 100 Hz
> 610 nm = 120 Hz
> 600 nm = 140 Hz
> 590 nm = 160 Hz
> 580 nm = 200 Hz
> 570 nm = 240 Hz
> 560 nm = 280 Hz
> 550 nm = 320 Hz
> 540 nm = 420 Hz
> 530 nm = 540 Hz
> 520 nm = 700 Hz
> 530 nm = 900 Hz
> 520 nm = 1,200 Hz
> 510 nm = 2,000 Hz
> 500 nm = 3,000 Hz
> 490 nm = 5,000 Hz
> 480 nm = 8,000 Hz
> 470 nm = 12,000 Hz
> 460 nm = 17,000 Hz
> 450 nm >=20,000 Hz
>
> You can do this two ways... digitally or going be analog filters
> (inductors/capacitors)
>
> Digitally, I would use a labtop with a program built with LAB view to
> accept incoming sound frequencies and then output to the corresponding
> LEDs... And also, the louder the sound gets... the brighter the LEDs
> light up...
>
> You can put one LED array on each side for each audio channel...
> therefore your left LED array would be in sync with your left audio
> channel and vice versa for the right...
>
> Any opinions?

Forgot to mention that

700 nm ~= deep red ~ deep bass
600 nm ~ yellow ~ mid range
450 nm ~= deep violet ~ high treble

[Member02]

I personally would use the lower sprecrum for bass, but thats me.

I liike the idea, but how would you make it analog? I'd rather see it
done analog.


--
Member02

[flak_monkey]

There's an interactive video program that you could use to do this.
Similar to Maya's connections editor. You simply attach the parameter
of one item to drive the value of another item and determine output. Is
that LAB? It's been so long since video 1 I've forgotten. Doesn't have
to be video, you can use any mic. Overall, an interesting idea, sort of
an expansion on ground effects LED kits with light controllers.


--
flak_monkey

[Mariachi]

On May 30, 9:15 pm, flak_monkey <flak_monkey.2rf...@no-
mx.forum.carstereos.org> wrote:
> There's an interactive video program that you could use to do this.
> Similar to Maya's connections editor. You simply attach the parameter
> of one item to drive the value of another item and determine output. Is
> that LAB? It's been so long since video 1 I've forgotten. Doesn't have
> to be video, you can use any mic. Overall, an interesting idea, sort of
> an expansion on ground effects LED kits with light controllers.
>
> --
> flak_monkey

Correction... I meant to say "LABView"... Right now, in my internship
I am working with MATLAB and learning it at the same time. In the
future, I'll be dealing with LABView that is specifically designed for
these types of projects. Since I did a research paper on LEDs in a RC
circuit before and I like audio electronics as a hobby, I thought this
would be a neat project to do. You would have two inputs, your left
and right channel. Those inputs would come from a pre-amp signal...
Actually there would be two split pre-amp signals per channel... One
would go to the amplifier, and another would go to input controller
interface to be analyzed by LABView. In lab view, it would convert
the audio frequency to a light wavelength based on some equation. And
then, the laptop would send the signal to the output interface
controller and the controller would send a preamp signal to an dc
operational amplifier which would power the LEDs...

The main problem I would think to be is the number of outputs... both
the output interface controller and the dc operational amplifier would
have to have a ton of outputs...

One of the good things about LEDs is, they require very little power
to produce a decent amount of light... LEDs operational voltages
usually run around 1.5-3.0 volts and require very little current... I
would think with both the arrays lit, it would take about 5 amps from
the alternator/battery.

One thing I like about the digital approach is that you can specify
what wavelengths go with what... like purple for bass, or red for
bass... And also, you can increase the sensitivity in some audio
spectrum... So say you want the midrange spectrum more sensitive, the
midrange would cover a greater band of light, and leave less
sensitivity to the treble and bass. So in plain words, the midrange
would cover most of the LED array.

[Mariachi]

On May 30, 9:10 pm, Member02 <Member02.2rf...@no-
mx.forum.carstereos.org> wrote:
> I personally would use the lower sprecrum for bass, but thats me.
>
> I liike the idea, but how would you make it analog? I'd rather see it
> done analog.
>
> --
> Member02

If you do it the analog way, it would require a lot more tuning
circuits (capacitors and inductors)... Since you want each color LED
to be only lit in a certain audio spectrum... you would need to
isolate unwanted audio frequencies that are outside the audio spectrum
bandwidth... I would think it could be done... but it would require a
lot more handy work.

[Matt Ion]

Mariachi wrote:
> Okay, I have an idea...
>
> I'm sure everybody has heard of LED's before...
> I'm thinking of a future project that consists of LED panels, which
> include a linear or a thin array of LEDs that goes across the bottom
> of your car.
>
> Each LED would emit a different frequency of light. So say at the
> rear of the array you would have red LEDs that emit a wavelength of
> 700 nm. And towards the front of the array, you would have blue LEDs
> that emit a wavelength of 450 nm. If you have 100 LEDs per panel and
> 2 columns per panel, you would have 50 rows of LEDs... And put one
> panel on each side of the car.
>
> So if you had boundaries of 450nm - 700nm, and 50 LEDs per column...
> your increment would be 5 nm per LED.
>
> e.g.
>
> 450nm 455nm 460nm 465nm 470nm 475nm 480nm 485 nm ... 695nm 700nm
>
> Here's where it becomes interesting...
> You can match up sound frequencies with the frequency of light using a
> semi-linear relationship
>
> 700 nm = 20 Hz
> 690 nm = 30 Hz
> 680 nm = 40 Hz
> 670 nm = 50 Hz
> 660 nm = 60 Hz
> 650 nm = 70 Hz
> 640 nm = 80 Hz
> 630 nm = 90 Hz
> 620 nm = 100 Hz
> 610 nm = 120 Hz
> 600 nm = 140 Hz
> 590 nm = 160 Hz
> 580 nm = 200 Hz
> 570 nm = 240 Hz
> 560 nm = 280 Hz
> 550 nm = 320 Hz
> 540 nm = 420 Hz
> 530 nm = 540 Hz
> 520 nm = 700 Hz
> 530 nm = 900 Hz
> 520 nm = 1,200 Hz
> 510 nm = 2,000 Hz
> 500 nm = 3,000 Hz
> 490 nm = 5,000 Hz
> 480 nm = 8,000 Hz
> 470 nm = 12,000 Hz
> 460 nm = 17,000 Hz
> 450 nm >=20,000 Hz
>
> You can do this two ways... digitally or going be analog filters
> (inductors/capacitors)
>
> Digitally, I would use a labtop with a program built with LAB view to
> accept incoming sound frequencies and then output to the corresponding
> LEDs... And also, the louder the sound gets... the brighter the LEDs
> light up...
>
> You can put one LED array on each side for each audio channel...
> therefore your left LED array would be in sync with your left audio
> channel and vice versa for the right...
>
> Any opinions?

So essentially, you're wanting to build a big-*** spectrum analyzer.
Any decent audio recording/editing software on your computer has that
functionality built it - the code and/or libraries are out there to do
it. Driving the LED board would be a bit more of construction project.

[Mariachi]

I did a little analysis on how the actual program would run...
I came up with the following equations:

Speed of light = Wavelength * Frequency

I thought it would be best to make the independent variable the
frequency of the light
instead of the wavelength of the light to make things easier math
wise...

Your dependent variable would be the sound frequency corresponding to
fixed increments of the light...

Fixed increments meaning...
700nm 695nm 690nm 685nm 680nm 675nm 670nm... 450nm

Since frequency is directly related to wavelength by the equation:
frequency = (3.0*10^8 m/s)/(wavelength)

You would also have fixed increments of frequency:
4.28571E+14 4.31655E+14 4.34783E+14 4.37956E+14... 6.66667E
+14 [Hz]
red
violet

Basically the program is initally going to compute these sound
frequency values to match up
with the light values before any input happens... and store those
values inside an array that
has the same number of elements as the row of LEDs...

When the input signal comes through the controller interface... it
will round to the nearest
stored sound frequency and then match that sound freqency index with
the light frequency of the same index
but in a different array storing the light frequency values...

Then it would output to a certain channel based on that match:

Here where it becomes very very interesting...

In the program you can set whatever relationship you want to match up
sound frequencies to light frequencies...
So far, I have concocted up a couple of relationships that might be
useful later on.

Here would be a good place to stop reading if you don't know math or
calc for that matter...






1. A linear relationship (good for isolating a band, e.g. bass,
midrange, or treble)
The simple formula: y = mx + b
y - Sound frequency - Sf
x - light frequency - Lf
m - slope of relationship
b - minimum sound frequency utilized

m = (max sound freq used - min sound freq used)/(max light freq used -
min light freq used)
x = (light freq(variable) - min light freq used)

So if you want to only light the bass spectrum (20Hz - 200Hz)... you
would use the following
y = [(200Hz - 20Hz)/(6.66667E+14 Hz - 4.28571E+14 Hz)]*x + 20Hz
This would make 20 Hz deep red and 200 Hz deep violet

Or if you want to do midrange only (200Hz - 1000Hz)... you would use
the following
y = [(1,000Hz-200Hz)/(6.66667E+14 Hz - 4.28571E+14 Hz)]*x + 200Hz

Same thing for high treble... just use different sound frequency
parameters...







2. An biased end relationship... meaning the low end or the high end
gets most of the sensitivity of the array...
A polynomial relationship mainly for bottom(bass) end:
y = (a)*x^2 + b
a - acceleration constant
x - light freq(variable) - min light freq
b - minimum frequency
y - sound frequency

So say you want the array to have the most sensitivity in the bottom
end (bass) and little sensitivity on the treble
y = (~.5*10^(-25))*(x^2)) + 20 Hz

Wavel Light Freq Sound Freq.
700 4.28571E+14 20
695 4.31655E+14 20.47532082
690 4.34783E+14 21.92893793
685 4.37956E+14 24.40370085
680 4.41176E+14 27.94435421
675 4.44444E+14 32.59763165
670 4.47761E+14 38.41235492
665 4.51128E+14 45.4395387
660 4.54545E+14 53.73250126
655 4.58015E+14 63.34698159
650 4.61538E+14 74.34126313
645 4.65116E+14 86.7763049
640 4.6875E+14 100.7158801
635 4.72441E+14 116.2267231
630 4.7619E+14 133.3786848
625 4.8E+14 152.244898
620 4.83871E+14 172.9019516
615 4.87805E+14 195.4300768
610 4.91803E+14 219.9133435
605 4.95868E+14 246.439869
600 5E+14 275.1020408
595 5.04202E+14 305.9967516
590 5.08475E+14 339.2256506
585 5.12821E+14 374.8954098
580 5.17241E+14 413.1180082
575 5.21739E+14 454.0110335
570 5.26316E+14 497.6980044
565 5.30973E+14 544.3087132
560 5.35714E+14 593.9795918
555 5.40541E+14 646.8541018
550 5.45455E+14 703.0831506
545 5.50459E+14 762.8255369
540 5.55556E+14 826.2484253
535 5.60748E+14 893.5278547
530 5.66038E+14 964.8492818
525 5.71429E+14 1040.408163
520 5.76923E+14 1120.410578
515 5.82524E+14 1205.073898
510 5.88235E+14 1294.627498
505 5.94059E+14 1389.313533
500 6E+14 1489.387755
495 6.06061E+14 1595.120406
490 6.12245E+14 1706.797168
485 6.18557E+14 1824.720188
480 6.25E+14 1949.209184
475 6.31579E+14 2080.602634
470 6.38298E+14 2219.259061
465 6.45161E+14 2365.558411
460 6.52174E+14 2519.903553
455 6.59341E+14 2682.721893
450 6.66667E+14 2854.46712

Or you can cover the whole sound spectrum with the LED array by just
changing the acceleration constant
but still having a little bit more sensitivity on the bass end of the
sound spectrum...
y = (~4.5*10^(-25))*(x^2)) + 20 Hz


700 4.28571E+14 20
695 4.31655E+14 23.80256652
690 4.34783E+14 35.43150341
685 4.37956E+14 55.22960679
680 4.41176E+14 83.5548337
675 4.44444E+14 120.7810532
670 4.47761E+14 167.2988393
665 4.51128E+14 223.5163096
660 4.54545E+14 289.8600101
655 4.58015E+14 366.7758527
650 4.61538E+14 454.7301051
645 4.65116E+14 554.2104392
640 4.6875E+14 665.7270408
635 4.72441E+14 789.8137845
630 4.7619E+14 927.0294785
625 4.8E+14 1077.959184
620 4.83871E+14 1243.215613
615 4.87805E+14 1423.440615
610 4.91803E+14 1619.306748
605 4.95868E+14 1831.518952
600 5E+14 2060.816327
595 5.04202E+14 2307.974013
590 5.08475E+14 2573.805205
585 5.12821E+14 2859.163279
580 5.17241E+14 3164.944066
575 5.21739E+14 3492.088268
570 5.26316E+14 3841.584035
565 5.30973E+14 4214.469706
560 5.35714E+14 4611.836735
555 5.40541E+14 5034.832814
550 5.45455E+14 5484.665205
545 5.50459E+14 5962.604295
540 5.55556E+14 6469.987402
535 5.60748E+14 7008.222837
530 5.66038E+14 7578.794255
525 5.71429E+14 8183.265306
520 5.76923E+14 8823.284627
515 5.82524E+14 9500.591181
510 5.88235E+14 10217.01998
505 5.94059E+14 10974.50826
500 6E+14 11775.10204
495 6.06061E+14 12620.96325
490 6.12245E+14 13514.37734
485 6.18557E+14 14457.7615
480 6.25E+14 15453.67347
475 6.31579E+14 16504.82108
470 6.38298E+14 17614.07249
465 6.45161E+14 18784.46729
460 6.52174E+14 20019.22842
455 6.59341E+14 21321.77515
450 6.66667E+14 22695.73696


Or say you want the array to have the most sensitivity in the high end
and little sensitivity on the bass
y - sound frequency
b - highest frequency
x - light freq(variable) - min light freq
a - acceleration constant

y = b - (a*(x^2))
.... you would end up with something like this

700 4.28571E+14 22695
695 4.31655E+14 22691.19743
690 4.34783E+14 22679.5685
685 4.37956E+14 22659.77039
680 4.41176E+14 22631.44517
675 4.44444E+14 22594.21895
670 4.47761E+14 22547.70116
665 4.51128E+14 22491.48369
660 4.54545E+14 22425.13999
655 4.58015E+14 22348.22415
650 4.61538E+14 22260.26989
645 4.65116E+14 22160.78956
640 4.6875E+14 22049.27296
635 4.72441E+14 21925.18622
630 4.7619E+14 21787.97052
625 4.8E+14 21637.04082
620 4.83871E+14 21471.78439
615 4.87805E+14 21291.55939
610 4.91803E+14 21095.69325
605 4.95868E+14 20883.48105
600 5E+14 20654.18367
595 5.04202E+14 20407.02599
590 5.08475E+14 20141.1948
585 5.12821E+14 19855.83672
580 5.17241E+14 19550.05593
575 5.21739E+14 19222.91173
570 5.26316E+14 18873.41596
565 5.30973E+14 18500.53029
560 5.35714E+14 18103.16327
555 5.40541E+14 17680.16719
550 5.45455E+14 17230.3348
545 5.50459E+14 16752.3957
540 5.55556E+14 16245.0126
535 5.60748E+14 15706.77716
530 5.66038E+14 15136.20575
525 5.71429E+14 14531.73469
520 5.76923E+14 13891.71537
515 5.82524E+14 13214.40882
510 5.88235E+14 12497.98002
505 5.94059E+14 11740.49174
500 6E+14 10939.89796
495 6.06061E+14 10094.03675
490 6.12245E+14 9200.622657
485 6.18557E+14 8257.238499
480 6.25E+14 7261.326531
475 6.31579E+14 6210.178925
470 6.38298E+14 5100.927514
465 6.45161E+14 3930.532715
460 6.52174E+14 2695.771575
455 6.59341E+14 1393.224852
450 6.66667E+14 19.26303855





3. A combination of all them...
(especially good for the LED array to cover the midrange, but still
show some LEDs for bass and high treble)

Midrange - 200 Hz:1000Hz
Bass - 20Hz:200Hz
Treble - 1000Hz:20000Hz

For Midrange...
use the linear relationship
y = mx + b

y = {[(1000Hz - 200Hz)/(Get the difference for the light frequency
boundaries)] *(light freq(variable)-min light freq wanted)} + min
midrange freq

For Bass... use an exponential increase...

y = a*e^(-x/tc) + b

a - bandwidth - 200Hz - 20Hz = 180Hz
e = 2.718
x - (light freq(variable) - min light freq used)
tc - time constant ~~ (max light freq - min light freq)/5
b - minimum sound frequency = 20Hz

For high treble, use the polynomial relationship...(need some work on
this part)
y = a*(x^2) + b
a - acceleration constant
x - (light freq(variable) - min light freq used)
b - minimum sound frequency



Here comes the coolest part... in the program LABView you will have
calibration knobs... that will automatically adjust sound frequencies
that the LED array shows most...
Whether you want a linear relationship the just the low(bass) end...or
a biased relationship with the array showing most the bass end and a
little of the high end also..
etc... etc...

You can also switch red for bass and violet for bass pretty easily...
All you would have to do invert the matrixes using for loop techniques

[Christopher Ott]

"Mariachi" <jpgarcia153@hotmail.com> wrote in message
news:1180566783.930251.24490@w5g2000hsg.googlegrou ps.com...
> Okay, I have an idea...
>
> I'm sure everybody has heard of LED's before...
> I'm thinking of a future project that consists of LED panels, which
> include a linear or a thin array of LEDs that goes across the bottom
> of your car.
>
> Each LED would emit a different frequency of light. So say at the
> rear of the array you would have red LEDs that emit a wavelength of
> 700 nm. And towards the front of the array, you would have blue LEDs
> that emit a wavelength of 450 nm. If you have 100 LEDs per panel and
> 2 columns per panel, you would have 50 rows of LEDs... And put one
> panel on each side of the car.
>
> So if you had boundaries of 450nm - 700nm, and 50 LEDs per column...
> your increment would be 5 nm per LED.
>
> e.g.
>
> 450nm 455nm 460nm 465nm 470nm 475nm 480nm 485 nm ... 695nm 700nm
>
> Here's where it becomes interesting...
> You can match up sound frequencies with the frequency of light using a
> semi-linear relationship
>
> 700 nm = 20 Hz
> 690 nm = 30 Hz
> 680 nm = 40 Hz
> 670 nm = 50 Hz
> 660 nm = 60 Hz
> 650 nm = 70 Hz
> 640 nm = 80 Hz
> 630 nm = 90 Hz
> 620 nm = 100 Hz
> 610 nm = 120 Hz
> 600 nm = 140 Hz
> 590 nm = 160 Hz
> 580 nm = 200 Hz
> 570 nm = 240 Hz
> 560 nm = 280 Hz
> 550 nm = 320 Hz
> 540 nm = 420 Hz
> 530 nm = 540 Hz
> 520 nm = 700 Hz
> 530 nm = 900 Hz
> 520 nm = 1,200 Hz
> 510 nm = 2,000 Hz
> 500 nm = 3,000 Hz
> 490 nm = 5,000 Hz
> 480 nm = 8,000 Hz
> 470 nm = 12,000 Hz
> 460 nm = 17,000 Hz
> 450 nm >=20,000 Hz
>
> You can do this two ways... digitally or going be analog filters
> (inductors/capacitors)
>
> Digitally, I would use a labtop with a program built with LAB view to
> accept incoming sound frequencies and then output to the corresponding
> LEDs... And also, the louder the sound gets... the brighter the LEDs
> light up...
>
> You can put one LED array on each side for each audio channel...
> therefore your left LED array would be in sync with your left audio
> channel and vice versa for the right...
>
> Any opinions?


If I'm reading this correctly, you're suggesting a function similar to a
spectrum analyzer with a single LED for each band being displayed. Each LED
(a different color for each band) would vary its brightness dependant on the
amplitude of the incoming signal in each band?

The first tripping point is the assumption that standard LED's are available
in 5nm increments from 450nm - 700nm. LED's from the same lot can vary by
5nm. You would really need to go with RGB LED's to have any chance of
keeping the display looking consistent from one end to the other. This
requires 3 independently controlled current sources (LED's are by design
current controlled, not voltage controlled) per RGB array. So your 200 LED's
are now requiring 600 independent current sources.

Your second major problem is the absurd cost. You are looking at a dedicated
PC (using LabView correct?), and some custom driver circuitry for these
LEDs. Then there's the RGB LED's themselves, and serial interface from PC to
600 channels. Remember each RGB has three independent LED's which must have
at least 5 bits of variable control (PWM or direct current control) to
achieve the color depth you're after.

The good news, is that the basic concept of what you're after is quite
common and is widely available. Google the phrase "Color Organ". Do the same
on Youtube (there's even a guy who hooked up the taillights on his Delorian!

So ditch the PC/Labview arrangement and build from a kit like everyone else
fer' Christ's sakes...

Chris

[GregS]

In article <1180671697.689289.326770@k79g2000hse.googlegroups. com>, Mariachi <jpgarcia153@hotmail.com> wrote:
>I did a little analysis on how the actual program would run...
>I came up with the following equations:
>
>Speed of light = Wavelength * Frequency
>
>I thought it would be best to make the independent variable the
>frequency of the light
>instead of the wavelength of the light to make things easier math

When I built displays, I used what color seemed best, not just follow the spectrum.
For the highest freqs I wanted yellow. I used purple for the lowest freqs.
How the display is organized is just as important as how it functions.
Sharp frequency transitions are really neat in the midrange. You can
almost see the notes being played.

greg

[GregS]

If you'll relate Katherine's wall with breakdowns, it'll safely
act the allocation. It can welcome dependent worships apart from the
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