Sound issue
in [UK Mac]
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From: gavsko on 21 Dec 2009 19:20 I run itunes from a G4 quicksilver through an amp to provide music for the whole house. All the vocal sound now appears as if it is in the background (for CDs aswell). I thought it may be the amp blowing a channel but I tested it using a friend's machine and it's fine. Is the headphone socket (from where the phonos run) or hardware damaged or could it be (hopefully) a software issue? (10.4.11 OSX)
From: Jaimie Vandenbergh on 21 Dec 2009 20:48 On Mon, 21 Dec 2009 16:20:43 -0800 (PST), gavsko <gcrosswell(a)aol.com> wrote: >I run itunes from a G4 quicksilver through an amp to provide music for >the whole house. All the vocal sound now appears as if it is in the >background (for CDs aswell). I thought it may be the amp blowing a >channel but I tested it using a friend's machine and it's fine. Is the >headphone socket (from where the phonos run) or hardware damaged or >could it be (hopefully) a software issue? (10.4.11 OSX) Is the wiring set up such that you could possibly have one of your stereo channels crosswired? You get odd audio effects like that if you miswire one of the speaker cables. Cheers - Jaimie -- 'Rings! Rings! Wherever they may be I am the Lord of the Rings,' said he 'And I'll find them all, wherever they may be And I'll bind them all in the dark,' said he -- Kevin Ahearn
From: Rowland McDonnell on 22 Dec 2009 00:20 gavsko <gcrosswell(a)aol.com> wrote: > I run itunes from a G4 quicksilver through an amp to provide music for > the whole house. All the vocal sound now appears as if it is in the > background (for CDs aswell). I thought it may be the amp blowing a > channel but I tested it using a friend's machine and it's fine. Is the > headphone socket (from where the phonos run) or hardware damaged or > could it be (hopefully) a software issue? (10.4.11 OSX) Software issue? If it's turned up all of a sudden and there's been no hardware fiddling, that'd be my bet. I've had a similar problem with screen brightness that was fixed with PRAM zapping (also a 10.4 G4). Have you tried creating a new user account? If so, does the sound problem afflict it? If not - well, it'll be a prefs problem or similar (first guess, anyway): I've got: ~/Library/Preferences/com.apple.systemsound.plist Look for any other sound preferences as well, and try trashing them and rebooting (yeah, I know what they say, but I'm paranoid). If that's NBG, I'd continue with Applejack <http://applejack.sourceforge.net/>, and use it thus: applejack AUTO - telling it to do its worst. Then after rebooting twice before logging on (don't ask me why, but I find that avoids oddness after cache trashing), see if yer Mac's okay. Also If it's still not okay, there's PRAM zapping to try - reboot holding down ctrl-opt-p-r. Umm. There's a power manager reset to try, too - not sure of the method on your particular Mac, but the Web will know... Can anyone think of anything else to try? Rowland. -- Remove the animal for email address: rowland.mcdonnell(a)dog.physics.org Sorry - the spam got to me http://www.mag-uk.org http://www.bmf.co.uk UK biker? Join MAG and the BMF and stop the Eurocrats banning biking
From: Jim on 22 Dec 2009 01:16 Rowland McDonnell <real-address-in-sig(a)flur.bltigibbet.invalid> wrote: > There's a power manager reset to try, too - not sure of the method on > your particular Mac, but the Web will know... > > Can anyone think of anything else to try? Somewhere in the /Applications/Utilities folder there's a "Audio MIDI Setup" app - might be worth loading that and see if everything's as it should be. Jim -- "Microsoft admitted its Vista operating system was a 'less good product' in what IT experts have described as the most ambitious understatement since the captain of the Titanic reported some slightly damp tablecloths." http://www.thedailymash.co.uk/
From: J. J. Lodder on 22 Dec 2009 05:26
Rowland McDonnell <real-address-in-sig(a)flur.bltigibbet.invalid> wrote: > Jaimie Vandenbergh <jaimie(a)sometimes.sessile.org> wrote: > > > gavsko <gcrosswell(a)aol.com> wrote: > > > > >I run itunes from a G4 quicksilver through an amp to provide music for > > >the whole house. All the vocal sound now appears as if it is in the > > >background (for CDs aswell). I thought it may be the amp blowing a > > >channel but I tested it using a friend's machine and it's fine. Is the > > >headphone socket (from where the phonos run) or hardware damaged or > > >could it be (hopefully) a software issue? (10.4.11 OSX) > > > > Is the wiring set up such that you could possibly have one of your > > stereo channels crosswired? You get odd audio effects like that if you > > miswire one of the speaker cables. > > It does sound like phase reversal on one channel to me - at least, if > it's the case that the only part of the signal that's common to both > channels is `vocals' and only the vocals are so affected. Reversing the phase on both channels surely makes it worse still. Seriously though, a phase reversal doesn't afffect the vocals. It's the basses, below about 400 Hz, that sufffer, Jan |