memory

Hi dazheng,

??? why the trollops keep trying to hyjack our project thread ???

i think we must use the secret code to hide detail or they will copy our ideas.

Ive gone back to the playa and want better snd.

I have a pair of unused 5.1 speakers. I was using them with my pc. I want now to use them with my 'television'.
The problem to solve is: The speakers have two stereo inputs.
One for low frequencies, one for middle rage frequencies and one for hight frequencies.

I want to design an active filter that will be able to split the stereo signal from my 'tv' to this three sections of frequencies.

Many years have passed since I was designing filters and I would like your help. i think we need mcu to do it better with lot more code for better sound. If there is a schematics out there it would be great.

plz.U hv to design active filter according to the frequency response of ur speakers.
Then u will get excellent performance from ur filter.
I hv one small swollen key filter design software but unable to upload here.

i know it is need for quick. but i know you are good strong profesional guru that helps again.

Thanks mate

zuisti

Hi dazheng,

??? why the trollops keep trying to hyjack our project thread ???

i think we must use the secret code to hide detail or they will copy our ideas.

Ive gone back to the playa and want better snd.

I have a pair of unused 5.1 speakers. I was using them with my pc. I want now to use them with my 'television'.
The problem to solve is: The speakers have two stereo inputs.
One for low frequencies, one for middle rage frequencies and one for hight frequencies.

I want to design an active filter that will be able to split the stereo signal from my 'tv' to this three sections of frequencies.

Many years have passed since I was designing filters and I would like your help. i think we need mcu to do it better with lot more code for better sound. If there is a schematics out there it would be great.

plz.U hv to design active filter according to the frequency response of ur speakers.
Then u will get excellent performance from ur filter.
I hv one small swollen key filter design software but unable to upload here.

i know it is need for quick. but i know you are good strong profesional guru that helps again.

Thanks mate

zuisti

... or they will copy our ideas.
Hehe.

Hi dazheng,

sorry for disturbing your delopment but i need more help v fat plz.

I also have have a small buzzer that emits many different sounds and, also, 3 error codes:

1) Bip Bip Bip at 440Hz
2) Biiip Biiip Biip at 700Hz
3) Biiiip Biiip Biiiip at 1150Hz
4) Biiiip Bip Biiip Biiiip at 1295Hz

I want to decode these 4 error codes.
I can't touch nothing (the buzzer, the amp, the sound) than I must use a small little mic to capture the sound/code.

Besides, the buzzer is situated in a crowded place with many people that speaks, screams, cries etc.

Is it possible to do?

Thanks a lot and sorry, another time.

zuisti

the buzzer is situated in a crowded place with many people that speaks, screams, cries etc.

Where is this project going to be located?

Sounds like some sort of torture chamber!

A result of the high over-pressure in the showers.

Bip Bip Bip Biiiip Biiiip Biiiip Bip Bip Bip

"I want to design an active filter that will be able to split the
stereo signal from my 'tv' to this three sections of frequencies."

An active filter is way overkill. Your speaker wire is stranded with
a multiplicity of low, mid, and high frequency strands, each clearly
marked if you look close enough. Many redundant 3-strands, but
always a multiple of three.

Just separate out all the low frequency strands and connectorize
them, then do the same for the mid and high frequency strands. Now
you can connect your speakers accordingly.

Hi "zuisti",

i think about your err codes.very dificult for little MCU and we will need very poweful MCU with lots of speed code.

mayme you can use digital passband freq digital opamp but that is very hard.

you would appreciate links(?() to sites providing details regarding 'Multicycle Integrating Analog to Digital Converters'.

I believe these are meant for precision measurement applications requiring 20 - 24 bit precision. so i dont think 8 bit or 16 bit MCU is any good.you need 32 or more MCU bits.

maybe you need one MPU for each frequency(?) so it will cost a lot.

i am veeeery buzy now and have a lot of difficult project to complete. but i am happy to help my clever friend again.

"... i know you are good strong profesional guru ..."

This thread is proof counter to that.

"I hv one small swollen key filter design software but unable to upload here."

There are people whose profession it is to help up your load.

"frequency(?)"

Correct. A pink star for you!

"maybe you need one MPU for each frequency(?) so it will cost a lot."

To cover each frequency between 20Hz and 20,000Hz would require 19980 MCUs!

Very costly indeed!

As long as you stay avay from LARGE memory model, one MCU will manage several correlation filter - one for each detect frequency. Length of correlation filter affects band-width of each filter. Quite possible to detect frequencies below the noise level as long as the beeps have small deviations from nominal frequencies.

can iuse 1-wir eeprom to store cfg dta for signle strand?

"??? why the trollops keep trying to hyjack our project thread ???"

That brings up a really interesting question:

Why are we morons not using e-mail, blogs, social networking
websites, etc. for our idiotic project discussion?

"can iuse 1-wir eeprom to store cfg dta for signle strand?"

Absolutely! We use FPGA on source end of all the strands and clock a 1-bit
transaction on the strand when the strand's signal crosses zero.
On the other end, each strand has it's own 1-wire slave; EEPROMs, MCUs, etc.
The throughput is really pretty good overall. Obviously the higher audio
frequencies do better.

"... each strand has it's own 1-wire slave ..."

In the interest of maintaining the high quality of this thread:

s/it's/its/