Hardware :: Tweeters Blown Up By Large Volume Level Audio Files
Dec 12, 2010
I am concerned about my tweeters in relation to signal coming from the computer. I have machine LINE OUT fed into my preamplifier (hardware audio component) all the time. The max levels of tuner, tape recorder, turntable, etcetera are all "equalized". That is, they all more or less deliver the same output level to the preamp. The difference between a CDDA level and that of another one is always minimal. The same goes for vinyls (not "so minimal"). As to radio broadcasts, one may be xmiting with great power and make differences larger, but still no harm for the tweeters, relatively speaking. Mine are 50w four-way loudspeaker systems (forgive the word, I used to call them baffles).
The power amplifier is 30w per channel so, theoretically, it cannot damage the speakers. But the preamp (Yamaha C-2) can deliver a very large signal. When this signal is unduly large, the woofer and mid-range speakers won't suffer. But the enormous resultant distortion can damage the tweeters. Some audio files have the signal recorded at very high levels. And I could launch aplayer, play or mplayer, or any GUI player, or I could receive an email audible notification when amixer's output controls are near the top and put my tweeters in danger. I think the core of the problem is the huge variation in level between different audio files.
My volume control seems to have only three settings: TOO LOUD, VERY QUIET, OFF. If I adjust the Master volume slider from the Panel, only about the right 1/8th has any effect and if I slide it past about the 95% mark, I get no sound at all. At the far-right end of the volume control, I get total volume. It's basically like the slider only has any impact in the top 5% of it's space. Below 95% of the slide, there is zero volume.
It's so drastic, that one tap down of the volume button on my keyboard kills the sound (because it nudges the slider past that 95% mark). This happens in the Audio settings, etc., system-wide. If I adjust the volume for an individual app from within the app (MPlayer, for example) it behaves exactly as expected (that is, app volume works smoothly, it's just master volume that has this issue). I have run through most of the "obvious" things-- I'm wondering if I broke something by installing the extra KDE packages to get Amarok to work.
I had to reinstall 10.04 today and after installation I have found the volume level to be very low. I have to move the slider to max to get a normal listening level. It was not like this previously before reinstalling.
Running Suse 10.0 on a lenovo idea pad and I am having a problem getting the volume set high enough to hear any music, dialogue!. I have set the volume control up as far as it will go but can hardly hear anything. Had this problem running Ubuntu on a Sony laptop but managed to resolve the problem but cannot remember what I done.
I have the audio out of the media machine passed into the line in on my workstation. It's just handly to have the audio pass in this way so that i can manage the volume or headphones or whatever from one machine.
This worked, and worked well, for a very long time. I recently reinstalled the workstion, FC14 still. After the reinstall, my passthrough doesn't work.
If i start up some media on the media machine, and then open up the volume control on the workstation, i can see the volume meter moving along with the audio, but nothing plays out of my speakers.
Whenever I play streaming videos, (mpg, wmv, etc), the volume will move from where it's set to maximum level. Then I have to adjust the sound. If I play another streaming video it will do it again. I'm using F11 with Gnome. How to stop it from happening? No matter how I adjust player's volume, it starts off at maximum level. This is my sound info I'm using: Audio device: nVidia Corporation MCP73 High Definition Audio (rev a1)
After login is always volume level set on 100%. Alsactl store and restore works properly. Manually run: sudo /etc/init.d/alsasound reload reset volume level into proper level, but after login to Gnome is always volume level 100%,Here are some logs:
I am running Debian Lenny 2.6.26-2-amd64 and I have the following setup: 3 Raid6-Volumes each 19TB size (md0,md1,md2) I would like to join the three of them to one large LV (of 57TB) formatted with a jfs fs.
I installed: jfs_mkfs version 1.1.14, 06-Apr-2009 lvm version LVM version: 2.02.39 (2008-06-27) Library version: 1.02.27 (2008-06-25) Driver version: 4.13.0
Prerequisite: the md are assembled and have synched: Code: cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] .....
I used jfs_mkfs on each of the three mds and mounted the drives to run some checks and they worked without a problem. I am pretty sure the drives/raids are OK. Then I created the VG "pod" with the three drives as members: ..... Then I created a 40TB LV for testing Code: lvcreate -L 40T pod which gave me this Code: lvscan ACTIVE '/dev/pod/lvol0' [40.00 TB] inherit
Then I went on formatting the drive using Code: jfs_mkfs /dev/pod/lvol0 Still - everything fine.
When trying to check the partition with jfs_fsck I get: Code: ujfs_rw_diskblocks: disk_count is 0 Unrecoverable error writing M to /dev/pod/lvol0. Cannot Continue.
The really funny thing is that I don't seem to get the error if I try to run the thing with a 25TB LV everything looks fine: There is nothing in syslog that would point to the source of this error. Also - if I try to mount the 40TB partition, everything is fine - but when I try to write to it, the whole system hangs and there is no way to recover.
I'm asking for an advice about the setup of a large volume: I have 2 disks of 1 Tb each and I want to merge them in a single volume/partition. I am in doubt about setting up a LVM, a RAID0 device or both. I know that RAID0 has no redundancy but I will manage a backup on other media, so that I can take advantage of the stripe feature in terms of I/O performance. On the other hand LVM let me to easily manage and expand the volume in a near future. Am I correct? Anyway I don't know if I can ever setup both and in which order. First LVM then RAID, I suppose.
I just upgraded to Fedora 12 and I am now having some sound issues. On Fedora 11 if I set my volume below about 45% I couldn't hear anything. However 45% gave me a comfortable listening level. Now if I set my volume below about 20% I cannot hear anything, however 20% is very loud. And by loud I mean approximately equivalent to 80% under Fedora 11.
How-To set the mixer volume level at system startup or login. A funny story that led up to this how-to first...
I made the obvious mistake of leaving my volume level set to nearly maximum. Of course, Ubuntu's default behavior is to restore the mixer to its last known state - a point of much irritation at that moment. This had been a problem in the past as well, and today was the last straw. So, I did some research, for quite some time I might add, and decided to be a good community member and share my findings. It seems that there are all sorts of opinions around the web. The dominant opinion is that a mixer should always be restored to its last known state, that this is all well and good, and why would you ever want it to work any other way. Lots of people suggested that the startup sound be disabled, which was not a terrible solution, but was still a work-around as it means that the next sound bite to be played is the alarming one.
Needless to say, I wanted to find out what I would call the "proper" way to set the mixer level at startup. As my laptop uses PulseAudio, and my office desktop uses ALSA audio, the methods were different. My focus was for PulseAudio as that was the original purpose. I note here that my method for ALSA is less detailed as it is not the default for Ubuntu audio these days. So, if you are using ALSA, you might have to be a little creative to make my ALSA note fit your needs. I have attached 2 files to this post, one for ALSA and one for PulseAudio.
I have a acer aspire 8735G-6502 this bad boy [URL]: Acer Aspire 8735G-6502 18.4-Inch Widescreen Laptop: Computer & Accessories I am trying to figure out how to configure the touch sensitive volume level control. It works somewhat, but only increasing volume. Xev does a strange job detecting the key codes, and assigning keyboard short cuts does the same thing. In fact when moving ones finger in a downward, volume decreasing motion it picks up only strange upward finger motion.
We had to reboot a server in the middle of a production day due to 99% iowait (lots of processes in deep sleep waiting for disk iops). That's never happened to us before. It had been 363 days since the last fsck, so it started automatically on reboot. It hung at 4.8% on a 2TB LVM2 volume for about an hour. I killed the fsck and rebooted the server. The second time, it went past that point and is currently at about 62%. First, what causes e2fsck to hang like that? Second, is there any danger in killing e2fsck, rebooting, and starting it again?
I have an Echo Mia soundcard that I had working in Ubuntu 9.04 fine but just upgraded today to 10.04. I got the card working fine with the Medibuntu respository Alsa Firmware. However, every time I boot up the volume is insanely loud (I use studio monitors with a set volume). As soon as I click to change the volume it suddenly kicks in down to the correctly set volume but I need it to not boot at max. I remember I had to do something in 9.04 to resolve this and had the Echo Mixer in the panel as a launcher but I can't remember what I did to get it to initialize the volume correctly. I've tried everything I could think of to no avail.
Anyone have any ideas? Even if I could just use a script to set the volume to initialize to a specific level I'd be fine with raising it after.
When someone is speaking into the mic, I'd like a "level meter" such as the one that comes with gnome sound recorder, that flashes up and down when a sound is made or somebody talks.This will be done in Javascript, using the brand new "Rainbow API", i.e. inside the browser.I know nothing about audio programming, so - where would I get *started* with something like this? Could anyone tell me at least WHAT to Google?
This is a Lenovo L512 laptop with Intel HD Audio (Realtek ALC269 / Intel G45 DEVIBX) which was recently upgraded to Squeeze. I've been having trouble using the headphones on this machine, as the speakers continued to play while the headphones were connected. I normally use KDE, and the available mixer only offers one channel. I thought I might be able to manually silence the speakers by using the command line tool alsamixer. Unfortunately, alsamixer has a channel for the headphones, but it doesn't do anything, only master volume is controllable. By luck I decided to play around with Gnome today and to my great surprise, System -> Preferences -> Sound offers complete control over all functions of the audio hardware. Does anyone know how I could get these features working under KDE?
I am looking for a tool that will tell me, in less than half a second, if the microphone is picking up any sound above a certain threshold. (I plan to then mute the Master channel with another command line tool, like amixer.)
In playback application i guess "snd_pcm_lib_write1" is the function call used to write the audio data to sound card at kernel level.If that is true. how can i send the same audio data at kernel level to other system connected over LAN.
I am using the diff command with the -r option, to compare a large number of files and files in subdirectories. My main interest is to find out which files have been changed, and not what the actual changes are, and since a lot of files has been changed, it would be a lot easier to view the file names only. Is there and option for diff that might do this, or does there exist a similar tool/command that could do the job?
I've discovered that Dolphin seems to lose random files when copying many large folders.
I first noticed this a few months ago when I tried to copy my music library from one folder to another on the same HDD. It consisted of around 600 folders and 6500 files. During the copy there were no errors but after the copy I found that some of the newly copied folders were missing files. I put it down to human error or a glitch.
Yesterday I tried to copy 13 folders containing rips of some of my DVDs. Each folder basically had one film of either 700MB or 1.4GB. Again no errors showed up during the copy but I found 3 of the newly copied folders were empty.
It's not so critical with music or films but I can't afford to lose work data like this.
Has anyone experienced or seen a similar problem with Dolphin? I'm going to have to do some more extensive testing but this is not good.
The first time I noticed the problem I was running KDE4.3.4 (I think) and now the latest was with KDE4.4.0.
I has ubuntu 10.15, which i used a flash drive to load into this
netbook asus 1000HA
While trying to use the monitor GUI in preferences to adjust the resolution to an external monitor I lost the video and found out that the xorg.conf file was gone. I copied a xorg.conf.failsafe to make a new xorg.conf but this left the 640X480 res. I found in a forum sum settings in another xorg.conf and using those I got to 800x600. So
I have noticed that the latest version of SUSE 11.3 is supposed to come with a Netbook addition. During install I did not see this feature. Instead I did the default install with full blown KDE.
I'm currently viewing all my video and DVD stuff on two different desktops (CentOS and Kubuntu), each with a combination of MPlayer and VLC. Now I'm considering doing everything only with an "MPlayer-on-steroids" build for Slackware 13.37. Basically, I like the one-app-per-task approach. But first things first.
1) I'm basically using this script here as a starting point for my build: [URL] What libs (from slackbuilds.org) would be reasonable to include before the build to support playback of the most common - and the odd exotic - video formats? The thing with MPlayer is that ./configure --help spits out a gazillion of options
2) Until now I've only used the no-GUI version of MPlayer, since the default interface seems to me almost unusable. Now I understand there are several new frontends available for MPlayer. Is there one that works OK for DVD playback, e. g. enables you to select chapters, languages and subtitles without having to jump through burning loops?
I have a dual boot and my windows plays audio fine.My ubuntu plays audio fine as well however when I click on the Volume Control icon on the panel it gives me this error:No volume control GStreamer plugins and/or devices found.and I am still unable to control volume. I have alsamixer installed and it can control my system sound fine but all this time I've been able to use the controls on my HP Pavilion dv5250ca laptop's keyboard controls to control the volume and I'd like to be able to continue doing that- I haven't been able to for the last 2 days.
When I go into Sound Preferences I can crank up the output volume above 100%, making it audible from my monitor's built in speakers.
(this is for a kiosk that doesn't have room for extra powered speakers) Every time I reboot it resets output volume to 100%. Is there a way to change the volume back to 125% or whatever max is so the general public can hear the video that is played after a reboot? (this is to be a permanent installation that won't even have a keyboard or mouse attached, so automating this is a must)
I'm having a problem with sound. No audio from speakers (multi boot system, audio works on other os). Plug in logitech headset, and very low audio volume (skype is not usable). Pandora is no output. lspci gives me 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
When I hit the Pulse Audio Device Chooser icon and then click on 'Volume Control' the volume control GUI flashes on for long enough for me to realise it has flashed on and then is gone again! If I run the chooser as root from a terminal (sudo padevchooser) I get this response when I hit the error:
Strange thing is, I have spent a lot of time working on my wife's laptop and Pulse Audio was working great (after many brain twisting, hair ripping hours of working on it) and indeed is still working despite the lack of GUI. This is all good except I want to change the output device for ringing in Skype and this is where I need to 'Move Stream ...' and can't get to it.
I achieved to create a stream of the audio output of my sound card. ices2 and icecast2. I receive it with an internet radio device (NOXON). Works alright, but the volume is far too low.
