How to build. a

[jleaman]

Does any one have any information how to build a Eq display like the one on this yamaha eq. all i want_is audio Graph. that displays the audio Frequencies. Something like a Large bar Graph. I dont want the controls just the display.

[DJ]

I don't know if this will help, since you obviously know how you want to do the actual equaliser part, but if you use a TAS3103 digital audio processor from TI it already has a spectral analysis output in I2C format. It's the chip I'd use for an equaliser, because it has some very nifty features.

Check it out at:
http://focus.ti.com/docs/prod/produc...Number=TAS3103

Good luck

DJ

[davesaudio]

I seem to remember this was a popular
kit "back in the day"
opamp bandpass filters feeding individual LM3915 led bar graph drivers
IIRC

[dunderchief]

anybody have an example of a project using that chip. Looks like it might be kind of cool.

[peranders]

The magazine Elektor had this project (many years ago, 80's?) with LED's and many bandpass filters but nowadays I gather that you take a ADC and make this in software...but this is hardly something for a newbie I suppose.

[Da5id4Vz]

I think your looking for a real time audio analyzer (RTA) project.

These guys make a myriad of devices in all kinds of price ranges. I'm posting the link to give you some more background for your project.

http://www.gold-line.com/

Was it Rod Elliot who recently posted a notice to start collecting LEDs for an upcoming RTA project? I know Ive seen this notice a number of times, but cant remember where.