Looking for advice on DSPs - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 31st December 2013, 08:14 AM   #1
diyAudio Member
Join Date: Jan 2013
Default Looking for advice on DSPs

Firstly, I note that there is no DSP specific forum area, and hope that this is the right place to post this.

I'm wanting to learn to make a digital crossover, as tbh I don't like the idea of using one without knowing the mathematics behind it, as ideally I'd like to be in control of them (i.e. turn on, off, process, raw process etc)

At this point I'm trying to get my head around how frequencies can be identified and divided up on a mathematical level, using basic mathematical functions (i.e. no strict calculus).

Can anybody point me in the direction of a good textbook/resource?

Will almost everything I do revolve around fourier series or are there other options available?

  Reply With Quote
Old 31st December 2013, 10:14 AM   #2
chaparK is offline chaparK  Luxembourg
diyAudio Member
Join Date: Apr 2010
Location: Luxembourg
Hi Nannoo,

I think it's a great project you have here.

I'm not going to recommend you a textbook because I don't know how familiar you're with DSP concepts.

What I'd like to recommend is that you pick a platform first. I suppose you want real-time processing. Can be a DSP evaluation board or a programming environment on your PC that connects to your soundcard. Can also be a system based on the Raspberry Pi (like this one: DSP for the Raspberry Pi).
I'd say the important first step is that you make sure you get the incoming samples from the input and that you're able to send samples to the output - otherwise you're going to loose your head with readings and miss your goal, which is about achieving something real, right?

It doesn't matter if you don't pick the proper platform for your project in the beginning: what you will learn can be transposed later on any other platform.

Once that you have control over the flow of numbers that represent the samples in your system, you can start implementing the basic blocks: gains and delays.

If you get that far, shout again and I'll help you implementing more complex blocks.


Najda DSP
  Reply With Quote
Old 31st December 2013, 04:15 PM   #3
diyAudio Member
Join Date: Jun 2009
Given nannoo's thinking STFT and is apparently unaware of IIR and FIR filters I suspect most any intro DSP text would be fine. I'm not current on texts but it's easy enough to look up a few courses to see what they're using and check reviews at Amazon or wherever.

Currently available SoCs tend not to be particularly good choices for XO. Details and some low cost embedded alternatives in pages 49 to 55 of this thread. On the PC probably the easiest real-time path would be to reimplement Reaper's ReaEQ plugin. There's plenty of codebases which can be leveraged for that. Cross Time DSP and rePhase are both written by DIYA folks, though pos isn't distributing source.
  Reply With Quote
Old 4th January 2014, 11:42 PM   #4
diyAudio Member
nigelwright7557's Avatar
Join Date: Apr 2008
Location: Carlisle, England
You might want to consider the PIC DSP.
There is a lot of info and help on the Microchip Technology Inc site.
Murton-Pike Systems PCBCAD51 pcb design software. http://www.murtonpikesystems.co.uk
  Reply With Quote


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
Need some advice where to install LED, also power socket advice. Mull3t Construction Tips 14 28th May 2012 04:32 PM
Small SMPS's for preamps/DSPs fb Power Supplies 0 28th December 2010 03:10 AM
Free: Analog Devices ADSP-2101 16-bit fixed point DSPs Evan Shultz Swap Meet 0 6th April 2005 04:14 AM
Poster in Musical Instrument forum needs bridging advice on BrianGT 4780 advice moving_electron Chip Amps 0 16th February 2005 12:37 AM

New To Site? Need Help?

All times are GMT. The time now is 08:12 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2