Hi-jack surround receiver DSP - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level

Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

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
Reply
 
Thread Tools Search this Thread
Old 27th March 2010, 10:12 AM   #1
Kth is offline Kth  Denmark
diyAudio Member
 
Join Date: Oct 2005
Default Hi-jack surround receiver DSP

Hi,
Does anyone have experiences with "hi-jacking" a surround receiver and inserting their own DSP code?
Many surround receivers today come with a RS232 or similar connection making it possible to software upgrade them so I assume that it should be possible somehow to upload some of your own DSP code. Maybe there is already surround receivers on the market allowing the customers to insert their own DSP software?

I want to create a good and simple solution to a poor mans digital crossover. I need some basic filter routines for FIR and IIR filters, and also a delay. If the DSP chip for instance is ARM based I could write the routines myself. The problem as I see it is not to write the filter routines but more how to get your own code up and running on the receiver and get an overview of what addresses are used for what.
Another not so important but nice thing could be to remove all the DSP crap that you never use such as audio presets ("Rock", "Classic".."Stadium" etc.).

There is propably a lot of threads about this already but unfortunately I failed to find them when searching for it.

/Kim
  Reply With Quote
Old 28th March 2010, 03:41 PM   #2
Kth is offline Kth  Denmark
diyAudio Member
 
Join Date: Oct 2005
Does the lack of response mean that no one has experience with this?
Or is the question unclear or somehow stupid?
If it is because there is already a lot of threads about this it would be very helpfull to me if someone could point me in the right direction and give me a link.

/Kim
  Reply With Quote
Old 28th March 2010, 07:41 PM   #3
diyAudio Member
 
Join Date: Oct 2001
Location: .
Perhaps it would be useful to find out just how cheap is the cheapest receiver with non mask-programmed DSP chip.
  Reply With Quote
Old 28th March 2010, 08:35 PM   #4
diyAudio Member
 
Join Date: Jan 2008
Location: Virginia
Both of my receivers had an EEPROM chip that contain the code. You would need a regular EEPROM reader/programmer and to disasamlbly the code.
  Reply With Quote
Old 29th March 2010, 04:02 PM   #5
Kth is offline Kth  Denmark
diyAudio Member
 
Join Date: Oct 2005
rfbrw:
I think that for instance Nad T743 (which is reasonably cheap) has a RS-232 port that can be used to perform software updates. I assume these software updates involves changing the DSP code but I don't know for sure.

SoNic_real_one:
I can see it is quite up-hill if you do not have anything else than the assembly code. Do you know if the user input and display functionality is typically performed at another chip or is it the same DSP chip handling everything? And what kind of DSP chips was used in your receivers?
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
FS: Yamaha DSP-AX620 surround sound amp DavidJE Swap Meet 0 21st April 2009 11:57 AM
IR Receiver - 3.5mm jack for Home theater Processor JRace Parts 5 30th March 2009 03:57 AM
Yamaha surround receiver questions daring Chip Amps 6 6th July 2008 09:28 PM
Connecting EQ to Surround Receiver sdclc126 Multi-Way 7 28th February 2005 07:15 PM
Surround sound from an integrated stereo receiver ? fireman Everything Else 4 20th January 2004 01:39 PM


New To Site? Need Help?

All times are GMT. The time now is 07:59 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2