Pic driven digital audio delay

[mister_e]

So why not using a dedicated Audio delay IC instead? Some are Home theater dedicated.. but who will know?

Ti do some. A PIC/ad/memory/DA plah plah would be just too bad for that kind of task... more distortion than good results...

If you need only a few Spectrum bands, have a look to TDA7416

Sorry but, you make it much complicated that it should be...and you scrap the possible modern sound quality... wich is already soooo bad

Yeah i'm an audio purist

you could still by an audio delay processor
Lexicon, Alesis, Yamaha, etc etc etc

[skimask]

So why not using a dedicated Audio delay IC instead? Some are Home theater dedicated.. but who will know?

I have to find one first, something in less than a BGA9000 pin package! And this project is just a 'gee-whiz' box that goes in between my mp3 player and the stereo itself. Eventually, I'm going to tie it into a LOAD of leds for the spectrum analyzer instead of the graphic LCD.

Ti do some. A PIC/ad/memory/DA plah plah would be just too bad for that kind of task... more distortion than good results...

As it is, the output sounds pretty good. I don't overload the input...and if anything, I introduce noise rather than distortion (at least not the clipping kind of distortion). My sample rate on the A/D and D/A is 44.2khz (because it's a good round number that the master timing PIC produces), I know higher is better, but that would mean more need for memory in the middle.

[QUOTE}If you need only a few Spectrum bands, have a look to TDA7416[/QUOTE]
I like my 128 band per channel spectrum analyzer!

Sorry but, you make it much complicated that it should be...and you scrap the possible modern sound quality... wich is already soooo bad
Yeah i'm an audio purist

Probably, but if we didn't overcomplicate things, we wouldn't be here!

you could still by an audio delay processor
Lexicon, Alesis, Yamaha, etc etc etc

What I've got right now is fairly compact (about the size of a VCR tape) and runs off a battery pack. An external box is not in my 'Master Plan',

[mister_e]

Let's suggest an oldy but still on the market....TAS3103 could be a great suggestion...

It's the first that spring to mind. Worth to look at something like that.

I don't remind the whole option it provide.. but i remember it cost about 10$ USD in a 39TSSOP package, something even my dog can solder on a board


TI TAS DSPs are usually nice. I used them a lot.

[skimask]

Let's suggest an oldy but still on the market....TAS3103 could be a great suggestion...

It's the first that spring to mind. Worth to look at something like that.

I don't remind the whole option it provide.. but i remember it cost about 10$ USD in a 39TSSOP package, something even my dog can solder on a board


TI TAS DSPs are usually nice. I used them a lot.

I'll check into them. They might be the ticket, as long as there isn't a steep learning curve and a load of programming to figure out. I guess I just want the single chip, everything is already done, type chip.

[mister_e]

They're usually easy to use. If you want to use/set the Biquad filter... it's another story... but doable.

They just need a I2C bus, and few commands... no big deal... this is why i told you that maybe a 12F could be enough..

[mister_e]

mmm... those new Analog Device ADAU1701, ADAU1702, ADAU1401 look pretty nice too... but brand new too.

http://www.analog.com/en/subCat/0,28...0%255F,00.html

i'll ask for samples... i've just found an application for them ... mmmm

[mister_e]

Ti Tpa5050, Tpa5051