Strange Audio Glitch With Volume Adjust

When I hit the volume keys on the keyboard to adjust the volume, there is a delay that I do not get when doing the same with my desktop system. There is also an audible click on the audio when the volume is adjusted. If I go to audio preferences and then use the same keys to adjust the volume, the click and delay goes away. When I leave audio preferences the problem is still fixed for at least awhile. Rebooting brings back the annoying click and delay and I think it comes back after awhile whether the computer is rebooted or not. I have experimented with turning the audible response to volume changes on and off and this has no effect on the problem other than the problem goes away because sound preferences have been opened to make the change and not because of what the setting is. I think the problem must have to do with the sound source being opened and closed whether the audible response is set or not. When sound preferences are opened, it's as if a different routine is being used when the volume keys are pressed and it continues to be used until that piece of code gets purged from RAM memory when it hasn't been used for awhile.
I'm just curious if anyone has this issue as well.

Ah, the ever popular "feature" explanation.
I can accept that it is a result of attempting to implement a feature but the way it is working on my machine indicates that this "feature" is poorly implemented.
Well designed computer programming anticipates users actions as best as possible and makes things work as best for the current situation. Most Apple programming is a perfect example of how to do this correctly. When I hit a key to change the volume, it's reasonable to think that there's a good chance that I will hit the key again because once might not change the volume sufficiently enough. Instead, what I get is the sound channel turning on and off for every key press, no matter how quickly I press the key. This happens even if I do not have an audible response selected. Should sound be turned on when there isn't any sound to be played? I don't think this should be necessary for changing the volume if you do not have an audible response set.
Now this is how I feel this should actually work:
Sound, when running from battery should be handled like a disk drive or a screen. If it is not used for a set amount of time then it should be turned off and turned back on only if it is needed again. Hitting the volume keys when no sound is playing might set a shorter time limit before the sound is turned off but the "on" time should be sufficiently long enough to hit a volume key again without requiring the sound to be turned off and on on each press.
Remember how I mentioned that the sound problem would go away, maybe even for days if I opened the sound preferences? This would indicate to me that under this situation, the sound is not actually being turned off after a reasonable amount of time. Under certain situations, it doesn't stay on long enough and others, it stays on too long. If I am right about it happening during sound playback, then it's really messing up by turning off and then on when it clearly doesn't need to.
I am pretty sure that I have had the issue while plugged into power and at least once while iTunes was playing. Certainly when sound is already playing this shouldn't occur. For some reason, I can't seem to get the issue to surface again, but I think that it just might take some time after rebooting sometimes for it to happen again. I will post more on this when it happens again.

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No audio AND no volume adjustment available. Why?

No audio AND no volume adjustment available. Why?

Check your settings. The iPads have a small switch on the right edge. It can be used as a rotation lock to keep the screen from automatically reorienting itself as you move around, but you need to have the tablet’s settings configured properly. That same switch, right above the volume buttons, can also be set to function instead as a mute button to silence certain types of audio.
If the switch is set to work as a mute button, you can change its purpose to “screen-rotation lock” by tapping the Settings icon on the home screen. On the Settings screen, tap General on the left side, and on the right side of the screen flick down to “Use Side Switch to.” Tap to select Lock Rotation or Mute to set the button’s function. Even if you set the side switch for your preferred use, you can still mute the Mini or lock the screen. Just double-click the Home button, and when the panel of apps appears along the bottom edge of the screen, flick the row from left to right with your finger. Tap the icon on the far left side of the row to either lock the iPad’s screen or mute the iPad’s alerts, notifications and sound effects. Music, podcasts and video are not muted unless you turn the volume all the way down.
http://www.atreks.com/app-no-sound-on-ipad-4-%E2%80%93-what-to-do/
 Cheers, Tom

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Sorry, not the right answer. But thankx for taking a shot. According to
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I'm starting to actually work with iMovie now and my first real project is giving me fits. I made a slideshow in another program, including music. I exported it as DV and imported it into iMove. I added a few titles and one effect. iMovie, of course, splits the movie into clips with each of these operations. The movie plays perfectly in iMovie and also in Quicktime Player - the problem pops up when I burn the DVD in iDVD (maybe I need to post this in the iDVD forum, but see below). At every single split (beginning and end) there is an audible glitch - an interruption, if you like. The result is totally unusable, of course.
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You've imported video clips created in a different application to iMovie to join them together, then passed the iMovie project along to iDVD. Apparently something in that process is affecting iDVD's ability to encode the audio. That's not too surprising, actually. If there's a tiny audio flaw anywhere, iDVD may not be able to encode the DVD properly, causing an audible defect. (iDVD's job is convert an iMovie project to the MPEG-2 format used by DVD players. If the material we hand it isn't perfect, we might hear a burp. Interestingly, the burp may be more obvious on some DVD players than others.)
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Got it now. Thanks for taking the time to explain. Sorry to be so dense.
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Hi friends
I too have a macbook pro running 10.6.6 and an odd audio problem which has recently shown itself and although different to Luiscv's problem, may well be related.
My audio works fine through the built in speakers but gets all fruity with some but not all audio as soon as I plug in the headphones. I get crystal clear audio when playing mp3's through quicktime whether I have the headphones plugged in or not.
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What is happening, and how do I fix it?

dominicandsumi wrote:
Thanks tjk, I tried that but it did not help. However over these last 2 days I noticed something more.
When I go to the keyboard setting, the 'use all f1 keys..." was off (as it was supposed to be) and then I click to turn it on and then off again and then the keys are ok and working perfectly till...
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I am experiencing a strange audio issue with my Intel-HDA ICH7:
# lspci -v
00:1b.0 Class 0403: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
Subsystem: Hewlett-Packard Company Unknown device 30a5
Flags: bus master, fast devsel, latency 0, IRQ 22
Memory at d2400000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access>
when I installed Arch linux the first time a mounth ago on this computer, I had a sound problem that was solved in a very strange way.
Everything worked fine until a week or so (I believe from Alsa 1.0.12). Now sometimes sound works and sometimes it doesn't. For example sometime I boot the computer and have no sound, then I reboot it without doing anything, and then sound works.
I have tried messing with the modprobe.conf:
# /etc/modprobe.conf (for v2.6 kernels)
# --- BEGIN: Generated by ALSACONF, do not edit. ---
# --- ALSACONF version 1.0.11 ---
#alias snd-card-0 snd-hda-intel
#alias sound-slot-0 snd-hda-intel
# --- END: Generated by ALSACONF, do not edit. ---
#options snd-hda-intel model=F1734
options snd-hda-intel model=z71v
options snd-hda-intel position_fix=1
but it was useless. If I put back the modules in rc.conf everything is worse: sound doesn't work at all.
A diff between lsmod in a "working boot" and a "without sound boot" showed that the same modules where in kernel memory.
A diff between dmesg showed this difference:
< hda_intel: azx_get_response timeout, switching to single_cmd mode...
was present in the not working boot. This line is absent in a working boot dmesg.
The only way to make the sound card working everytime is to remove the snd* modules load from the boot sequence and load the modules "by hand" after the login.
Any ideas?
PS : If something is unclear due to my poor English please tell my and I'll try to explain it better.

phrakture wrote:snd-hda-intel is screwed up - on my thinkpad I had to go into the bios and enable the modem for sound to work. Oddly enough, the modem was off by default.
Also, mine has no PCM listed, I need to use "front" as my PCM level... not to mention the UI is way off with 'tpb' (if you have a thinkpad)
Yes it's not an Arch Linux related problem: I had problems with Debian (Etch and Sid based distros like ubuntu) too (but there I had no modprobe issue on the init sequence. Maybe is a problem of shared IRQs, but I have to study the existing documentation as I am a newbie). The difference is that Arch is simple enought for me to try something like modprobing "by hand" in the init sequence. PCM seems to work, however the volume is very low and I have found no way to make the mic work. Under Mepis I was able to make it work only if I plugged it in windows xp and then reboot into Linux. But I can't try it with Arch as I have erased the windows partition...
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I'm having a strange audio problem with USB microphones and headsets. The issue with my Logitech H650e is shown in this screencast I recorded. In the first part of the screencast, I am not speaking into the mic—yet you can see the levels fluctuating as if there is static playing (not in a natural pattern that you'd see when someone is speaking). In the next part of the video I demonstrate that selecting the built-in iMac mic for input, and then re-selecting the Logitech headset temporarily solves the problem. You can see the input start to fluctuate normally as it should when I am speaking. But at 0:31 in the screencast, you can see the input levels freeze and stop registering anything. I continued to speak until the end of the screencast, but no input was detected. For this screencast, I was on a Go To Webinar call, but the problem occurs regardless of whether I'm using Skype, Go To Webinar, GarageBand or any other software.
The problem with my Blue Yeti USB microphone is also different. In that case, the input does not freeze as it does with the Logitech headset. The levels appear as you would expect, and it seems to work. However, the person on the other end can hear static in the background, even though I don't hear it in my own headphones. I learned this because I just tried to do a Skype interview with the Blue Yeti, and the interviewer told me they could hear static. We closed Skype and called each other back twice, but the problem persisted. Then, suspecting the problem was related to what I described above with the Logitech, I unplugged the Yeti and then plugged it into my Macbook Air 2013 (also running Mavericks). Lo and behold the static completely disappeared.
My Griffin iMic and Audio Technica lavalier mic (attached to the iMic) behaves similarly to the Yeti, except in this case I can hear the static when I speak with my monitoring headphones. The input works but I get a lot of cracking and static in the background. This was confirmed by calling the Skype Test Call number and recording a message, which is then played back.
Here are the facts:
All 3 of my USB audio microphones/headsets do not work with my 2013 iMac running Mavericks
All 3 of these microphones/headsets worked fine with my 2008 Mac Pro running Mountain Lion
All 3 of these microphones/headsets work fine with my 2013 Macbook Air running Mavericks
In this other thread, several people are reporting similar issues with the iMac 2013 and Mavericks. At least two people did not have the issue when the iMac 2013 was running Mountain Lion. This of course suggests the issue is the combination of the iMac 2013 and Mavericks.

Apple>About This Mac>More Info>Service
Please read the warranty paperwork that came w/your computer.
You have 14 days to return the computer w/no questions asked.
You have 90 days of FREE phone tech support on top of your standard 1 year warranty unless you also purchased AppleCare which gives you an additional 2 years of coverage plus FREE phone support.
Strongly suggest that you take FULL advantage of the above before it runs out. Let Apple deal w/the problems.

Strange Audio Glitch With Volume Adjust

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