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Thread: Change volume with Engine RPM

  1. #21
    FLAC ukchris's Avatar
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    Quote Originally Posted by Ninja Monkey
    This could quite easily be coded as a plugin for D3 in a couple of hours
    I did this with the D2 SDK but lost the source to a disk crash. Basically as you said I set a max and min then moved proportionally between them according to the speed. Let the user select their own rations to suit their car and driving style.

    It took me longer to figure out how to change the volume from a Delphi app than it did to tie it to the speed. Could make a nice addition to your app.

    So could logging position and speed to a GPX file...

    Chris.

  2. #22
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    The best way to change the volume would be based on the internal noise, since engine is not the only source of noise. Many cars have considerable noise coming from windows and tires. So you would need to base it off of the noise that a microphone measures. This would be the most ideal way (as well as most complicated). Also, in creating the program, one should remember that the increase is not linear but logarithmic, it might not matter if it is using the volume control of the programs, but even then the volume increase is not always linear.

  3. #23
    My Village Called 0l33l's Avatar
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    Quote Originally Posted by rushnrockt
    The best way to change the volume would be based on the internal noise, since engine is not the only source of noise. Many cars have considerable noise coming from windows and tires. So you would need to base it off of the noise that a microphone measures. This would be the most ideal way (as well as most complicated). Also, in creating the program, one should remember that the increase is not linear but logarithmic, it might not matter if it is using the volume control of the programs, but even then the volume increase is not always linear.
    Based on your idea, if some people are speaking then it will make the volume higher

  4. #24
    Maximum Bitrate grepzen's Avatar
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    ya don't want your stereo competing w/ the environmnet. (not until it can also read your mind and know when to shut up)
    so, the current philosophy is to base them off of vehicle speed which points more to road noise at highway speed. --Current cars do not sense noise for their auto leveling. It's MPH not RPM.

    MPH is available from the ECU as well as GPS (when so equiped)
    •Micke

  5. #25
    FLAC ukchris's Avatar
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    I had a car that compendated based on RPM and it worked great, the amount of compensation was adjustable and I never had a problem, so much so you don't even notice it, you just never have to adjust the volume. This was in a Vauxhall Calibra as standard.

    Later I had a WRX with a head unit that supposedly did the same based on noise sensing, it was junk, next to useless.

    I think RPM is probably the best, or maybe a combination of RPM and Speed ideally but considering it is probably easier to get to GPS data than PBD in most cases I would lean toward that.

    Chris.

  6. #26
    Stank Cheese n8scstm's Avatar
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    Quote Originally Posted by FunkDaMonkMan
    Yea.. wow.. um.. does your PC do it?

    This isn't the "stock chevy head-unit" forum...
    Yea.. wow.. um.. did I say it was the "stock chevy head-unit" forum? Don't be a d@#%-head.
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  7. #27
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    Quote Originally Posted by Focus Dan
    I have one of those, how do I get that working??
    Its only functional on the higher end ones and honestly i cant remember the model name that i actually had ( I wanna say it was the 101 model). Your owners manual she tell you if it has the feature.

  8. #28
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    Quote Originally Posted by 0l33l
    Based on your idea, if some people are speaking then it will make the volume higher
    It is always possible to have a directional microphone that will not be facing the passengers. I think if you look around, you will find a few car systems like that. Also, it is possible to distinguish difference between continuous road noise and people talking.

  9. #29
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    Quote Originally Posted by Ninja Monkey
    [*]Huge OFF button for when you realise what such an annoying 5 minute gimmick it is [/list]

    I agree.. it was cool for all of 5 mins before it became annoying having the volume switch like that.

  10. #30
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    The way the Chevys work is; there is a dial that adjusts the sensitivity to speed. At one setting 10 mph will increase volume say 5% where at a lower setting a 10 mph speed increase will only increase the volume 1%. If your gonna do it, something like that would be cool.
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