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Thread: Car audio quality in carputers

  1. #21
    Constant Bitrate stapan's Avatar
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    would LOVE to go with a 100% computer set-up, but since sound quality is very important to me (not just the competitions, the actualy musical reproduction as well) I'm not willing to sacrifice that just to have a 100% computer in my car, as is the case with a lot of other individuals on here.
    yeah, I feel the same way... I am hoping to prove to the world that it doesn't HAVE to be a compromise. My goal is to be the first 100% carputer setup to make it to the IASCA finals. which is a hell of a lot of work. my sound card has comparable or arguably better DAC's than Alpine F#1 status, and once I mod it further with Blackgate caps, I think it will outperform F#1 status for SQ. the major problem will be lack of processing, which sucks since tuning is so important for comp, but I think I'll be able to sort it all out eventually. I'll do whatever it takes, including writing my own software sound processing if needed..

    Now when we get that Magnum SRT-8.....it's a whole different ball game....lol
    sounds interesting, is this a new project of yours?

    I'd really be interested in learning more about this project of yours. Do you have any documentation of it up online anywhere or is it just too soon to worry about any of that right now?
    haven't had time to make a web site about it, and don't really want to spill the beans on everything yet. my basic setup consists of a Datalux LMX12R monitor, Opus 150w, Pentium M 1.7 on the new aopen microatx pentium M desktop motherboard, underclocked to rediculously low power consumption (about 10 watts and still almost as fast as a p3 3ghz). Silverstone La Scala lc04 case, but not sure if I will be using that yet. MBQuart QSD series 3-way components, currently in kick pods, but considering going with image dynamics horns instead since I'll be fabricating a custom dash anyway and as a daily driver the kick pods always seem to get in my way. JL 300/4 and 500/1 but may sell and go with different amps. streetwires/esoteric/phoenix gold/stinger/ 1/0 gauge welding cable/blue sea wiring and accessories currently still working on sound deadening, right now the count is at 100 sq ft of dynamat extreme plus 30 sq ft of raammat so far going to try to save some raammat for custom enclosures and trim.

    I will definitely be posting more about the project including pics pretty soon here for people to take a look at.

  2. #22
    Variable Bitrate kamikaze2112's Avatar
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    I've been trying to figure out how to program for Media Player's built-in eq in VB6, as that's what I'm using in the frontend that I'm writing. I'm not in it for the sound comps, just my own personal preference. And as far as listening to music on CDs, that kinda defeats the purpose of a carputer a lil bit LOL. At 80km/h with the windows down, you can't tell the diff between the original recording and an mp3 ripped at 160kbps. Might make a difference to those who have air conditioning tho LOL. All of my music will be in MP3 format, except for the odd CD that someone may want to listen to in my car.


  3. #23
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    Quote Originally Posted by stapan
    some cs student,
    I think this is one of the areas in which a carputer has huge untapped potential. I am hoping to take this to the next level, currently building an all out project using a pro studio sound card which has some hardware level effects like the ones you were talking about, along with some time delays etc. its not anywhere near as versatile as an alpine processor, and I am going to look into software processing as well. I have put about 200 hours into my project so far and the carputer should be in in a few weeks, will let ya know if I find any good software processor.
    Thanks, drop me an email / PM if you find anything interesting there
    Thats the area I'm curious about, so tell me if you find anything (as I'm curious).
    Yes, carputers have a huge amount of untapped potential, after all its an entire computer, it can be programmed to do a lot of things

  4. #24
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    Quote Originally Posted by stapan
    sounds interesting, is this a new project of yours?
    Were waiting for the SRT-8 version to make it to market first. Once that happens we will pretty much be doing everything in our power to get one. The supercharger (noivi 2000) will be coming off of the Dakota R/T and will be shoehorned off in the engine bay of the magnum (once bracketry is avaliable)....then a full computer and system will go in (actually the system and computer will probably happen first while we wait for Paxton to design a kit for the SRT-8)

    but, nothing will happen until they release the car...=]
    Jan Bennett
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  5. #25
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    Quote Originally Posted by kamikaze2112
    I've been trying to figure out how to program for Media Player's built-in eq in VB6, as that's what I'm using in the frontend that I'm writing. I'm not in it for the sound comps, just my own personal preference. And as far as listening to music on CDs, that kinda defeats the purpose of a carputer a lil bit LOL. At 80km/h with the windows down, you can't tell the diff between the original recording and an mp3 ripped at 160kbps. Might make a difference to those who have air conditioning tho LOL. All of my music will be in MP3 format, except for the odd CD that someone may want to listen to in my car.
    I agree, CDs are pointless on a car computer, but when you want to compete you have to accept their rules

    and A/C is a MUST for those of us over here in texas, where it's 7:30 am and already 89 degrees outside...but it doesn't really make it any quieter, you have the sound of the a/c blowing instead of the air....no difference really
    Jan Bennett
    FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

    Please post on the forums! Chances are, someone else has or will have the same questions as you!

  6. #26
    Constant Bitrate Pathos's Avatar
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    Quote Originally Posted by ALonDonThinG
    If this is as good as it,s made out to be, who knows what is possible using a Carpc
    " http://www.soundblaster.com/products/x-fi/technology/ "
    personally i cant wait.

    Creative makes some nice soundcards but i wonder what all their grandiose promises will sound like,tampering with sound only goes so far

  7. #27
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    that's exactly what I'm saying...lol

    you can mess witht he sound only so much, it's still going to be recorded in the same format as it was before you started messing with it...hehe
    Jan Bennett
    FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

    Please post on the forums! Chances are, someone else has or will have the same questions as you!

  8. #28
    Constant Bitrate 00christian00's Avatar
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    Look what i just found :
    http://www.mp3car.com/vbulletin/show...600#post560600
    I think that will satisfy most of your hunger for software audio elaboration.

  9. #29
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    Low Bitrate CAA's Avatar
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    I went down a slightly different approach. I didn't put a carpc in for the bulk of music available at my fingertips. I wanted it for the functionality, but running a national sound quality competition format (CAASQ) here in Australia I wanted to not lose any of the sound quality I previously had.

    I used a motherboard with digital output, and from there into a Precision Power DAC (digital - analog convertor) then RCA's into an Audiocontrol MVC (Master Volume Control) which allows me to control volume from the dashboard.

    From there I use TREO Engineering amplifiers, Veritas 8" midbass and Horns and CSX Subwoofer (12").

    Media wise I don't use MP3 but WMA, in lossless bitrate. Each song is around 45 Mb, but with 120Gb to play with, I can still fit all my favorite albums on the HDD.
    Australia's Largest CARPUTER Discussion
    www.carputer.net.au

  10. #30
    Constant Bitrate coffeejolts's Avatar
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    Quote Originally Posted by some_cs_student
    It was all curiosity, I'm not bent on improving sound quality. I was just curious, when headunits boast so many forms of enhancements to the sound quality (its probably just marketing though) do people build in similar features to carputer software?
    Hello from a fellow cs student. Basically, any DSP that can be done in hardware can be done in software. The only limits are those imposed by the underlying system (processor speed, memory, noise, etc.) I didn't check the software you listed. Maybe it works, maybe it doesn't.

    I don't know what your programming level is, but it sounds like you're curious enough to put some work into this. You could start by checking the backgrounds of your professors. Find one who has done work with dsp- this can be image processing or sound processing- because many of the concepts spill over. If a course is offered in dsp, take it- you'll learn more that you ever wanted to about Fourier. My prof actually had us write our own FFT for 2d images. It sucked, but I learned a great deal.

    If you're wanting to just get into the coding and not worry about how it all works, you could check out FMOD. It's a nice package, and it's free for educational work.

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