On Thursday 16 January 2014 09:17:58 Alexander E. Patrakov did opine: > Gene Heskett wrote: > > On Wednesday 15 January 2014 18:02:04 Alexander E. Patrakov did opine: > > > 2014/1/15 Gene Heskett <gheskett at wdtv.com>: > > > > Running an older ubuntu 10.04.4 LTS 32 bit build because a > > > > specially patched rtai kernel is mandatory for one app. However, > > > > I am booted to a 32bit 3.12.6 build ATM. > > > > > > > > The Audigy2 Value (SBO-400) card, and my amps/3way speaker all > > > > went south for the winter in a space of about 3 weeks, so I > > > > bought another amplified 3way kit and switched the audio back to > > > > the intel HDA facilities on this motherboard. > > > > > > > > Is there anyplace where I might find another 20 db of gain? Its > > > > so quiet, even a youtube video would never get me accused of > > > > disturbing the peace. > > > > > > Please post the output of alsa-info.sh > > > > > > The script is at > > > http://git.alsa-project.org/?p=alsa-driver.git;a=blob_plain;f=alsa/u > > > tils /alsa-info.sh;hb=refs/heads/build > > > > Output is huge, >60k, attached. If the server passes it. > > I have looked at the output. No smoking guns found (even with > codecgraph), but you seem to have the "independent headphones" mode > enabled for some reasons. It may well be that the output is routed > elsewhere (to non-existing headphones?) by default, and what you hear > is just some kind of leakage. > > Please run: > > alsamixer -c0 > > and report which controls affect the actual audible volume coming out of > the speakers. Master and PCM, and those are apparently not slaved to the little indicator applet that pops up with a horizontal slider at the top of the screen when I hit the mute, vol-down and vol-up buttons in the top edge of the keyboard. all 3 effect but the alsa sliders were and are now, wide open. > > > Also, we need to know whether this is a problem with speakers that > > > you want to work around (which likely won't work), or a purely > > > software problem. As you are a Certified Electronics Technician, I > > > assume that you have a digital multimeter and a cable with a 3.5mm > > > jack at one end and just three wires on the other. > > > > > > I want you to run this command: > > > > > > speaker-test -c1 -t sine > > > > > > and measure the output voltage of the card at its maximum volume in > > > three situations: with only an unloaded 3.5mm jack connected, with > > > typical 32-ohm headphones connected, and with your speakers > > > connected. I'll use my oscilloscope when I've brought it home. Possibly later today. > > I'll have to make that up when I am awake. Which I am not ATM, just > > half. And FWIW, the digital meters I own are all able to read rms by > > default. Which means their frequency response is totally in the > > toilet above 60hz. > > Here is a 60 Hz sine wave for your tools: > > speaker-test -t sine -f 60 -c 1 -p 100000 -P 4 -F S16_LE This seriously doubles in these small speakers, but is otherwise clean. Says its left front, reporting periods in values straddling 3.0, seems to run forever so I ctl+c'd it after about 90 secs. The -F S16_LE is not described in my man page, what does this do? I just woke up, but not for the day yet. This torn up knee is making it very difficult to get any real sleep (no pain-free position available) and it doesn't want to walk me around this morning without yelling about it. Thank you. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> It is the business of the future to be dangerous. -- Hawkwind A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens.
