An Amplifier Chip/Module with a Built-In Equalizer
Hi
I am looking for an Amplifier chip that has a built-in Equalizer,
so one can have some control over the sound, in addition to controlling the volume.
Does such chip exist?
If there's no Amplifier chip that has this built-in,
maybe there's an Equalizer chip alone, that I can add to an Amplifier?
Thank you
Hi
I am looking for an Amplifier chip that has a built-in Equalizer,
so one can have some control over the sound, in addition to controlling the volume.
Does such chip exist?
If there's no Amplifier chip that has this built-in,
maybe there's an Equalizer chip alone, that I can add to an Amplifier?
Thank you
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Wow, really cool product, first time I hear about it..
It is definitely nice, but way over what I need for the current project..
(this is not for a big living room system, but for a small thing I build..)
I need something small, compact, and that does not cost $100...
It is definitely nice, but way over what I need for the current project..
(this is not for a big living room system, but for a small thing I build..)
I need something small, compact, and that does not cost $100...
Try some of the range from STM, for example http://www.st.com/content/ccc/resou...df/jcr:content/translations/en.CD00166760.pdf
You can get this already fixed to a PCB with ancillaries here : DC 12V 9-18V USB Sound Card/DAC Pure Digital Amplifier Board Dual Channel 20W*2 | eBay
You can get this already fixed to a PCB with ancillaries here : DC 12V 9-18V USB Sound Card/DAC Pure Digital Amplifier Board Dual Channel 20W*2 | eBay
Thank you.
This looks nice, yet it does not support analog audio input..
It expects to connect to a PC via USB, and appear as a sound card..
I need something a simple thing that has Analog In, and Analog Out..
And does not require a PC around..
This looks nice, yet it does not support analog audio input..
It expects to connect to a PC via USB, and appear as a sound card..
I need something a simple thing that has Analog In, and Analog Out..
And does not require a PC around..
Then you'll probably need two chips - an equalizer chip and and amplifier chip. How do you want to control the equalizer? Mostly they have digital kinds of controls so would require programming a microcontroller.
No problem, I am completely open for such a solution (Amp+Eq)
Either via an array of potentiometers, or Digitally (e.g. via a Microcontroller) - both solutions are find for me..
TI TAS5756M is a DAC/DSP/Class D amplifier.
A couple of products around using it - IQAudio Pi DigiAMP+, Polyvection PlainAMP.
Main issue seems to be accessing the registers to effectively control the DSP.
The only published(?!?) path is to get the TI development board and tools for several hundred Euros.
A couple of products around using it - IQAudio Pi DigiAMP+, Polyvection PlainAMP.
Main issue seems to be accessing the registers to effectively control the DSP.
The only published(?!?) path is to get the TI development board and tools for several hundred Euros.
I think it is again expecting Digital audio input, and not a simple Analog Input..
From reading about them now, it says they are combined DAC and AMP,
it unfortunately does not mention allowing any Equalizer control..
Let's try to focus on the Eq only chip, which will be connected before an Amplifier chip(or module) that I separately choose.
I need an Equalizer chip, that has Analog In and Analog Out.
From looking in google, I found this option: LA3607
It seems to do the work: it is a 7-band equalizer, and it's quite cheap even - less than 1$ in eBay:
LA3607 3607 7-Band Graphic Equalizer DIP20 Good Quality | eBay
However in its Datasheet, the test circuit looks like this:
An externally hosted image should be here but it was not working when we last tested it.
http://pdf.datasheetcatalog.com/datasheet/sanyo/ds_pdf_e/LA3607.pdf
I don't understand why so many surrounding components are needed for it..
A Potentiometer per each band - well understood,
but why are the so many capacitors? (the ones that seem to be connected per band)
(my plan was to find an Eq chip that encapsulates all the work, so I do not need to PCB Print a special board for it and add many components)
If you're only interested in treble/bass controls then something similar to the TDA7318 will do the trick for the equalizer - http://www.st.com/content/ccc/resou...df/jcr:content/translations/en.CD00000150.pdf
Terrific option.
When a 2-Band equalizer is enough, this is very nice.
I am keeping this as option #1.
Now for the case when more than a 2-Band Eq is needed..
Something like 5-Band, or 7-Band..
Either as a single Eq chip, or Amp+Eq chip combined - both options are OK
Does anyone have any comment about the LA3607 Eq Chip?
OK I think I now understood LA3607's Test Circuit.
Each band has 1 Potentiometer, and 2 Capacitors.
I was wondering why 2 capacitors are needed per band,
and it seems that the 2 capacitors per band, define the band's Frequency.
So that's how whoever uses this chip, can define the frequency for each of the 7 bands,
for example: 60Hz, 150Hz, 400Hz, 1KHz, 2.5kHz, 6KHz, 15KHz
Each band has 1 Potentiometer, and 2 Capacitors.
I was wondering why 2 capacitors are needed per band,
and it seems that the 2 capacitors per band, define the band's Frequency.
So that's how whoever uses this chip, can define the frequency for each of the 7 bands,
for example: 60Hz, 150Hz, 400Hz, 1KHz, 2.5kHz, 6KHz, 15KHz
A three-band chip is available from Mouser - http://101.96.10.61/www.mouser.com/ds/2/348/bd37534fv-e-1018368.pdf
Becareful from that URL..
Altho it has "www.mouser.com" in it, it is in the Folder part of the URL, not in the domain.
The domain is some unknown IP Address, with no domain name.
That website might have a virus..
abraxalito, I suggest that you Edit your post, and delete that URL, so no-one will accidentally click it..
Altho it has "www.mouser.com" in it, it is in the Folder part of the URL, not in the domain.
The domain is some unknown IP Address, with no domain name.
That website might have a virus..
abraxalito, I suggest that you Edit your post, and delete that URL, so no-one will accidentally click it..
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