Announcement

Collapse
No announcement yet.

hiss sound from built in sound on laptop?

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • hiss sound from built in sound on laptop?

    I'm currently just researching and figuring out how I want to set up my carputer. I posted my prospective setup over in the newbie forum but I was just wondering...

    Does anyone know if I will get any background hiss or interference in my music etc if I am running off the built in sound in a laptop?

    Also, will the built in sound have enough power to send a decent voltage signal to the amp, or am I gonna have to crank up the gain?

  • #2
    My official answer is it depends.

    With some laptops, you can hear hiss and clicks and buzz, even when you just plug in headphones...

    As you turn the volume up, the music blocks out the background noise...you will have to test your machine.
    current projects

    Comment


    • #3
      Originally posted by NS98GSR
      I'm currently just researching and figuring out how I want to set up my carputer. I posted my prospective setup over in the newbie forum but I was just wondering...

      Does anyone know if I will get any background hiss or interference in my music etc if I am running off the built in sound in a laptop?

      Also, will the built in sound have enough power to send a decent voltage signal to the amp, or am I gonna have to crank up the gain?
      Hi,

      I found that if i used a AC invertor to power a laptop i got noise but i got a DC (Ciggy lighter) adapter and now get no noise at all on the audio but now get a little sometimes on the video!!??


      Regards
      blicky_1

      Comment


      • #4
        Originally posted by blicky_1
        Hi,

        I found that if i used a AC invertor to power a laptop i got noise but i got a DC (Ciggy lighter) adapter and now get no noise at all on the audio but now get a little sometimes on the video!!??


        Regards
        blicky_1
        With an inverter, it generates alot of noise in the conversion process. Unless you can find a way to ground the laptop to the same ground as your power source (the chassis of the car), its going to do that. Your direct ciggy adapter is DC to DC, so there is still noise, but it's greatly reduced. You can help eliminate some of it by adding a noise filter to the audio connection between your laptop and head unit.

        Video uses more processor power than just about anything else, so it's likely the increased draw over the power lines is helping to enhance that buzz. There's also the fact that video is generally quieter than direct mp3 or CD playback, so its possible that the noise is coming through a little more clearly because of that too.
        The ALEXIS Project
        MP3---VIDEO---GPS---REARVIEW---OBD---SKINNING
        Color Coding :
        DONE / MOSTLY DONE / BASE FEATURES / WORKING CONCEPT / NO CODE COMPLETED

        Comment


        • #5
          go to audio properties and mute everything but your main line. Sometimes you line in or mic or other stuff will be unmuted and can cause noise. Doubt it's your problem though.
          My carputer

          Comment


          • #6
            talk from experience: using a laptop (HP 4650 or something like that) with a power inverter - I get noise (using the built in sound card). When music is playing - it is not noticable. When it's not playing and you accelerate - it sound almost like a turbo

            I don't know if the sound is strong enough for the amps, but it is strong enough for my HU (Pioneer 740 or 750, who remembers) and the quality is BETTER then off mp3 CDs. So go figure.
            Current Status: For Sale

            Specs
            - 1.5Ghz Toshiba Laptop (available - no screen)
            - Indash Motorized 7" VGA TS
            - DeLorme GPS (sold)
            - Power Inverter (sold)
            - Pioneer HU (sold)

            Comment


            • #7
              I don't intend to have a head unit. Whether or not the laptop would give a strong enough signal for my amp will really make or break whether I put together a carpc. Does anyone know?

              Edit: The only way I can think to test this would be to hook my pocket pc up to my amp and see how loud the output is from that since the output volume is probably similar or less than what would come out of a line-out or headphone jack on a laptop.

              Comment


              • #8
                Originally posted by NS98GSR
                I don't intend to have a head unit. Whether or not the laptop would give a strong enough signal for my amp will really make or break whether I put together a carpc. Does anyone know?

                I have my laptop connected to my R phosgate 800a2 amp and I have absolutely no hiss. I do have video interference though, but very minimal :-)

                I bought a really thick shielded cable though (the cheapo radioshack ones might work, but i didn't want to deal with any possiblility of noise). My cable has a male headphone jack on one end and male rca cables on the other end, have it running straight to my amp in the trunk and havn't had any noice or gain issues. I have the gain on the amp not even turned up high and still plenty of clear volume.
                My carputer

                Comment


                • #9
                  Yep! Signal is signal, and if it can drive a set of headphones, it can provide a sweet source for an amp. Hell, you could plug a craptastic cassette walkman into the amp for killer sound off of nothing more than a car and a couple of AA batteries!
                  The ALEXIS Project
                  MP3---VIDEO---GPS---REARVIEW---OBD---SKINNING
                  Color Coding :
                  DONE / MOSTLY DONE / BASE FEATURES / WORKING CONCEPT / NO CODE COMPLETED

                  Comment


                  • #10
                    Thanks for the quick response. That's what I figured.

                    Comment


                    • #11
                      Originally posted by deadweasel
                      With an inverter, it generates alot of noise in the conversion process. Unless you can find a way to ground the laptop to the same ground as your power source (the chassis of the car), its going to do that. Your direct ciggy adapter is DC to DC, so there is still noise, but it's greatly reduced. You can help eliminate some of it by adding a noise filter to the audio connection between your laptop and head unit.

                      Video uses more processor power than just about anything else, so it's likely the increased draw over the power lines is helping to enhance that buzz. There's also the fact that video is generally quieter than direct mp3 or CD playback, so its possible that the noise is coming through a little more clearly because of that too.
                      Many thanks for the info, i will try a couple of things out and let you know how i get on.

                      Regards
                      blicky_1

                      Comment

                      Working...
                      X