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Posts: 436 | Thanked: 298 times | Joined on Jan 2010 @ England
#1
Hi All,
does anyone know how to use alsamixer -c0 to permanantly increase the headset volume??
is it possible to increase the volume the speaker output sends?

the reason i want to do this is i connect my N900 to my car stereo using the headphone out jack plug on my n900 to the aux in on my car stereo... whenever i make a phone call and use the audio sent to my car speakers i have to turn my car stereo volume up from 10 to about 20 to be able to hear the person i am speaking to .... when i end the call and turn my car stereo back to 'radio' or 'cd' it blasts my ears off if i forget to turn it down first! it would also be much easier not having to turn my car stereo volume up in the first place!!!

I have tried installing BOOSTN900 http://talk.maemo.org/showthread.php...ight=boostn900 but all it seemed to do was stop my N900 recording audio when shooting video?
and I asked the question here http://talk.maemo.org/showthread.php?t=65741 which is where I was pointed towards BOOST N900 and that thread got messy.

Is there any way we can work on getting the headphone output to stay at 100% ... here are my tests/experiences in trying to find what makes alsamixer drop the volume down after you have changed it to 100%.
  • open xterminal and type alsamixer -c0 this brings up alsamixer - headphon is at 0% (obviously because headphones are not plugged in)
  • plug in my headphones - headphon is at 0% still but Line DAC fills in with colour all the way to the top
  • open media player and start playing a song - Headphon jumps up to 88%
  • I can press the up arrow on my keyboard to increase volume slightly up to 100%
  • close media player and Headphon goes back down to 0%
  • make a phone call and Headphon goes up to 48% (why only 48% when media player goes up to 88%)
  • during call i can turn Headphon all the way up to 100% (which gives me the desired volume output I want for calls)
  • if i then end call Headphon goes down to 88%
  • if i then make another call Headphon goes back up to 100%
  • take jack plug out Headfon goes down to 0%
  • put jack plug back in Headphon goes up to 88%
  • make a call headphon goes up to 100% (which proves that taking jack plug out alone doesnt reset Headphon setting0
  • close alsamixer
  • open alsamixer Headphon is at 88%
  • make a call Headphon goes up to 100% (which proves that closing alsamixer doesnt reset Headphon setting)
  • close alsamaixer and take jack plg out
  • open alsamixer and put jack plug back in Headphon is at 88%
  • make a call Headphon goes up to 100% (which proves that taking jack plug out and closing alamixer doesnt reset Headphon setting)
  • take jack plug out and make a call
  • put jack plug back in and make a call using loudspeaker Headphon goes up to 100%(which proves that making a call without jack plug in doesnt reset Headphon setting)
  • take jack plug out, close alsamixer and make a call
  • put jack plug back in, open alsamixer (at 88%) make a call Headphon is at 100% (which proves that making a call with alsamixer closed and no jack plug in doesnt reset Headphon setting)
  • close alsamixer, take jack out, open media player and play a song using loudspeaker
  • put jack in, open alsamixer, make call Headphon at 100%
  • take jack out, close alsamixer, make call using normal phone speaker
  • put jack in, open alsamixer, make call Headphon at 100%
  • restart phone: open alsamixer, make call Headphon at 100%

while doing the above testing I experienced different behaviours at different points.

What my goal is, is to have 'Headphon' set at 100% (max) all of the time when I plug something into the headphones socket (jack plug)

Does anyone know how alsamixer works and how to get the Headphon to default to 100% every time without fail?

PLEASEEEEE HELLLLPPP
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Last edited by fraaaaanka; 2011-01-08 at 12:13.
 

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