Analog to Digital?

Ioannis · 8th December 2001, 11:23 PM

Let's say that I want to convert the analog audio from my tv to a digital signal and hook it up to my digital preamplifier. Can I do it?
Does anybody know a diy project for this , which of course doesn't cost a fortune to built it?

hifiZen · 9th December 2001, 04:24 AM

Sure, no problem. You can use something like CS5394 or 5396 plus an SPDIF transmitter like the CS8403/8404 or 8427. All you need is a lowpass analog filter and a couple opamps to provide the balanced signal on the input to the A/D. This should be a pretty straightforward project... Have a look at the datasheets on Cirrus' website - they provide most of the info you'll need to build the circuit, but of course I don't know how much you already know, so feel free to reply with questions!

paulb · 9th December 2001, 03:25 PM

Wouldn't your digital preamplifier already have an analog input? Or do you mean you are looking to replace its internal converter with a better one?

AudioFreak · 10th December 2001, 03:01 AM

I agree with PaulB... if your preamp has an analog input use it ... the more conversions the audio signal has to go thru the more it will be degraded ... of course if the AD converter in your preamp is not good then it might be worth considering.

Ioannis · 10th December 2001, 10:47 AM

No , my Sony ep 90 preamplifier doesn't have analog inputs.
Right now I 'm using another amplifier with analog inputs but I want to get rid of this as soon as possible (at least till the time that I 'm going to build the ADC ).
Thank all of you for your replies , I'm going to ask you a lot more as soon as I start to do the project.
Have you ever see, somewhere in the internet, a project like this posted?

Ioannis

tiroth · 11th December 2001, 07:52 PM

Like hifiZen said, all the info you really need is on Crystal's website. The CDB5535 is a complete system on a demo board which could easily be adapted to use with your project, especially since you may not need peak level detection, etc. (BTW, you can probably get this kind of info much more easily (and cheaply) with a microcontroller, rather than the PLD which their design uses).

9th December 2001, 04:24 AM	#2
hifiZen diyAudio Member Join Date: May 2001 Location: Mountain View, CA	Sure, no problem. You can use something like CS5394 or 5396 plus an SPDIF transmitter like the CS8403/8404 or 8427. All you need is a lowpass analog filter and a couple opamps to provide the balanced signal on the input to the A/D. This should be a pretty straightforward project... Have a look at the datasheets on Cirrus' website - they provide most of the info you'll need to build the circuit, but of course I don't know how much you already know, so feel free to reply with questions! __________________ - Chad.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Analog or digital?	rfarn	Solid State	0	13th February 2008 05:24 AM
Digital or analog?	xplod1236	Digital Source	1	19th May 2005 03:15 AM
Analog vs. Digital XO	Seth Smith	Multi-Way	11	1st June 2004 10:33 PM
digital or analog	electro samurai	Analogue Source	7	29th February 2004 06:23 PM
digital or analog?	electro samurai	Digital Source	0	17th February 2004 05:07 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

8th December 2001, 11:23 PM	#1
Ioannis diyAudio Member Join Date: Dec 2001 Location: Athens Greece	Let's say that I want to convert the analog audio from my tv to a digital signal and hook it up to my digital preamplifier. Can I do it? Does anybody know a diy project for this , which of course doesn't cost a fortune to built it?

9th December 2001, 03:25 PM	#3
paulb diyAudio Member Join Date: Jun 2001 Location: Calgary	Wouldn't your digital preamplifier already have an analog input? Or do you mean you are looking to replace its internal converter with a better one?

10th December 2001, 03:01 AM	#4
AudioFreak Warp Engineer On Holiday Join Date: Oct 2001 Location: Queensland, Australia	I agree with PaulB... if your preamp has an analog input use it ... the more conversions the audio signal has to go thru the more it will be degraded ... of course if the AD converter in your preamp is not good then it might be worth considering.

10th December 2001, 10:47 AM	#5
Ioannis diyAudio Member Join Date: Dec 2001 Location: Athens Greece	No , my Sony ep 90 preamplifier doesn't have analog inputs. Right now I 'm using another amplifier with analog inputs but I want to get rid of this as soon as possible (at least till the time that I 'm going to build the ADC ). Thank all of you for your replies , I'm going to ask you a lot more as soon as I start to do the project. Have you ever see, somewhere in the internet, a project like this posted? Ioannis

11th December 2001, 07:52 PM	#6
tiroth diyAudio Member Join Date: Dec 2001 Location: Pittsburgh, PA, USA	Like hifiZen said, all the info you really need is on Crystal's website. The CDB5535 is a complete system on a demo board which could easily be adapted to use with your project, especially since you may not need peak level detection, etc. (BTW, you can probably get this kind of info much more easily (and cheaply) with a microcontroller, rather than the PLD which their design uses).

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)