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Thread: Change volume with Engine RPM

  1. #1
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    Change volume with Engine RPM

    I think this would be a great feature, or standalone program. You could use an OBD II device or a mic.

    Change the volume by percentages based on the rpm of the engine. Vehicle speed could also be taken into consideration.

    up 50% at max rpm.

    Eg. (volume is set at 33%, if you rev to max rpm it is now at 50% because 33% x 150% = 50%)

    up 30% at interstate speeds.

    Eg. (volume is set at 33%, at 60mph the volume is reset to 44%, if the engine rpms are at max then it becomes 66%)

    arg.. i just need to get off my *** and program.

  2. #2
    Low Bitrate vision's Avatar
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    Mercedes release this function over microphone. Mesured sound level change audio system volume.

  3. #3
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    There are plenty of head units that use the same technology. JVC el kameleon is one. Someone could use that technology as a reference

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    Maximum Bitrate Danceheaven's Avatar
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    We are considering this by picking up on the engines tacho froma relay card a level of sensitivity could be set in the seetings in any case
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    Quote Originally Posted by Sonicxtacy02
    There are plenty of head units that use the same technology. JVC el kameleon is one. Someone could use that technology as a reference
    I have one of those, how do I get that working??

  6. #6
    FreeDrive Creator CdRsKuLL's Avatar
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    could you just not increase the volume by the speed of the car.. ie. at 60mph the volume is increased by a extra 5%.. or to make it easy an extra 1% per 10 miles an hour extra.. so if a gps is connected then thats all you need. Its more road noise, then engine rev noise I would of thought..

  7. #7
    Maximum Bitrate sfay93's Avatar
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    Speed would make more sense than RPM. Your car moves faster in higher gears at the same RPM generating more noise from the road and wind. My factory Tahoe stereo has SCV or speed controlld volume.
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    FLAC ukchris's Avatar
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    We experimented with this a while ago based on the car speed from GPS, the fundamentals are easy really.

  9. #9
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    Quote Originally Posted by FunkDaMonkMan
    I think this would be a great feature, or standalone program. You could use an OBD II device or a mic.

    Change the volume by percentages based on the rpm of the engine. Vehicle speed could also be taken into consideration.

    up 50% at max rpm.

    Eg. (volume is set at 33%, if you rev to max rpm it is now at 50% because 33% x 150% = 50%)

    up 30% at interstate speeds.

    Eg. (volume is set at 33%, at 60mph the volume is reset to 44%, if the engine rpms are at max then it becomes 66%)

    arg.. i just need to get off my *** and program.
    That big of a change in volume would be annoying and sound wierd you would have to make much smaller changes i think. My stock headunit in my chevy does this (using speed not rpm), the trick is gettin it to change gradually so you dont notice, also rpm def. wouldnt work, every time you shif the volume would drop and it would just not work. At least that's my opinion.
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  10. #10
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    Chevy's have been doing this for 15 years now. This is nothing new.
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