|
Related Topics:
| headphone sound in only one channel? - I've got a 17" iMac, 800 MHz. I recently purchased a new pair of good ones, to listen to movies, etc., on my Mac. However, I'm getting sound only out of the left ear phone. The iMac's supplied speakers work fine, sound in both. ..
value of ATI 9800XT video card - Just wondering Apple charges $320 CDN for this, but I went out and bought an X800G5 edition, so this point is probably moot any ideas on what it's worth would be thanks JB
can Airport card fry iBook? - I'm trying to help a friend with her dead iBook (G3, 700mhz, 2usb ports). A friend was setting her up with wifi. After he installed the Airport card (the original one) the iBook would not start. She got the Airport card from
SRX400 wireless + Mac PC card - I have a Linksys SRX400 Wireless router working with several PCs, I want to add a Mac to the mix. I know that built- in airport extreme card (802.11g) will work with this router, but I need the SRX range and speed. Linksys does not have any..
8800gts video card on Mac Pro - Hello, I have a two-part question a re: nVidia 8800gts card on a Mac Pro. I got the card for a PC, but I am in using it for CUDA on the Mac. So the obvious question, is there a patch..
|
|
|
Next: Mac Hardware General: Need Help understanding & setting up WDS
|
| Author |
Message |
External
Since: Aug 22, 2008
Posts: 2
|
(Msg. 46) Posted: Fri Aug 22, 2008 5:39 am
Post subject: Re: Whistle When Using Sound Card as Pass-Through [Login to view extended thread Info.]
Archived from groups: comp>sys>mac>apps, others (more info?)
|
|
|
"Michelle Steiner" <michelle DeleteThis @michelle.org> wrote in message
news:michelle-3B7634.22020121082008@news.west.cox.net...
> Even if the OP could get a reasonable SNR from his turntable
> > through the built-in interface, the RIAA equalization would be
> > a deal-breaker.
>
> True.
>
> > Of course one can easily get a USB interface, or even an
> > RIAA phono preamp with a USB interface, and the whole
> > issue would disappear.
>
> No, because he would still have that whine. he had the whine with no
> input at all, with nothing connected to the input jack.
And with the input volume cranked. If he used an RIAA preamp, he wouldn't
have the input volume cranked, and the whine would at least be reduced if
not eliminated.
Peace,
Paul |
|
| Back to top |
|
 | |
External
Since: Aug 20, 2008
Posts: 6
|
(Msg. 47) Posted: Fri Aug 22, 2008 8:55 am
Post subject: Re: Whistle When Using Sound Card as Pass-Through [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
On Thu, 21 Aug 2008 19:53:17 -0700 (PDT), "20to20.keith@gmail.com"
<20to20.keith DeleteThis @gmail.com> wrote:
>
>> I've owned laptops that managed remarkably good recordings through
>> their Line In. But I've learned not to be surprised when a laptop is
>> incapable of a clean recording, particularly when running on mains
>> power.
>
>Interesting, I had assumed that the mains in just kept topping up the
>built-in battery on my laptop and the battery was the power source and
>thus giving a 'clean' DC source.If I unplug the mains(just did that
>now),all that happens is the screen dims as it should under battery
>power.
It dims because the power scheme you have chosen tells it to when
running on battery. It may also lower the processor speed and disable
little-used ports. But all this is a matter of choice. The default
setting assumes you want maximum battery life. It's probably right,
but you can choose maximum performance. You might want to if using
the machine on battery power as a multitrack recorder.
Some laptops get very noisy with the power adapter plugged in.
Sometimes playing with the grounding can cure this, sometimes not. A
few laptops (Acer models in my experience) perform better for audio
with power plugged in but the battery REMOVED - a process to do with
battery monitoring causes glitches. |
|
| Back to top |
|
| |
External
Since: Aug 20, 2008
Posts: 13
|
(Msg. 48) Posted: Fri Aug 22, 2008 9:25 am
Post subject: Re: Whistle When Using Sound Card as Pass-Through [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
"Michelle Steiner" wrote ...
> hank alrich) wrote:
>> > Aren't we talking about a notebook computer here?
>> > Are there ANY notebook computers (PCs or Macs)
>> > that have *real* line inputs?
>>
>> Not to my knowledge. It's all low-voltage unbalanced miniplug stuff.
>
> What about the optical digital input on the current models of Macintosh?
A digital interface is not "analog audio". By definition.
We are discussing the issues around the OP's presenting symptoms
with his analog audio interface. If you want to change the topic to
digital interfaces, please start annother thread. Or else be prepared
to be dismissed as a troll. |
|
| Back to top |
|
| |
External
Since: Aug 30, 2005
Posts: 804
|
(Msg. 49) Posted: Fri Aug 22, 2008 10:01 am
Post subject: Re: Whistle When Using Sound Card as Pass-Through [Login to view extended thread Info.]
Imported from groups: per prev. post (more info?)
|
|
|
This message is not archived |
|
| Back to top |
|
| |
External
Since: Aug 20, 2008
Posts: 13
|
(Msg. 50) Posted: Fri Aug 22, 2008 10:33 am
Post subject: Re: Whistle When Using Sound Card as Pass-Through [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
"Michelle Steiner" wrote ...
> (hank alrich) wrote:
>> > > And indeed, it sounds exactly like digital hash to me. But that
>> > > was an easy one to guess, as all built-in sound interfaces suffer
>> > > from this problem to some degree. (Which is why I'm not
>> > > researching ways to eat hats. 
>> >
>> > And that's the reason I kept insisting that it had nothing to do
>> > with RIAA equalization.
>>
>> Yet unless you load the phono cartridge properly you are unlikely to
>> get tolerable results. Insist as you wish.
>
> That does not address the fact that he still gets that whine with
> nothing plugged in to the inputs.
Show us ANY laptop that does NOT exhibit that symptom?
Are you still in denial that all built-in sound interfaces are basically
junk? Surely you don't believe that Apple has some sort of
special dispensation exempting them from basic engineering
principles? |
|
| Back to top |
|
| |
External
Since: Aug 20, 2008
Posts: 13
|
(Msg. 51) Posted: Fri Aug 22, 2008 10:44 am
Post subject: Re: Whistle When Using Sound Card as Pass-Through [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
"Michelle Steiner" wrote ...
> "Richard Crowley" wrote:
>> If you want to change the topic to digital interfaces, please start
>> annother thread. Or else be prepared to be dismissed as a troll.
>
> Who died and made you dictator?
The court of public opinion.
Advice for free: Don't cross-post to technical newsgroups (such as
rec.audio.pro) if you don't want to be scrutinized for your technical
statements. |
|
| Back to top |
|
| |
External
Since: Aug 30, 2005
Posts: 804
|
(Msg. 52) Posted: Fri Aug 22, 2008 11:43 am
Post subject: Re: Whistle When Using Sound Card as Pass-Through [Login to view extended thread Info.]
Imported from groups: per prev. post (more info?)
|
|
|
This message is not archived |
|
| Back to top |
|
| |
External
Since: Aug 30, 2005
Posts: 804
|
(Msg. 53) Posted: Fri Aug 22, 2008 11:45 am
Post subject: Re: Whistle When Using Sound Card as Pass-Through [Login to view extended thread Info.]
Imported from groups: per prev. post (more info?)
|
|
|
This message is not archived |
|
| Back to top |
|
| |
External
Since: Aug 20, 2008
Posts: 6
|
(Msg. 54) Posted: Fri Aug 22, 2008 2:59 pm
Post subject: Re: Whistle When Using Sound Card as Pass-Through [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
Michelle Steiner <michelle RemoveThis @michelle.org> wrote:
>Let me say it again, and I'll type slowly so you can read it better: If
>the whine happens without anything plugged in to the input jacks, how
>will a phono pre amp solve the problem?
It will allow you to get a high signal level into the device, so you can
turn the gain down. With the gain turned down, the noise level will be
much more reasonable.
The reason the noise is so high is that the gain is cranked to an insane
level. The reason the gain is cranked so high is because there is no
preamp being used.
I hope this explains the matter more clearly.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis." |
|
| Back to top |
|
| |
External
Since: Feb 18, 2008
Posts: 16
|
(Msg. 55) Posted: Fri Aug 22, 2008 4:34 pm
Post subject: Re: Whistle When Using Sound Card as Pass-Through [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
In article <michelle-6E48E4.10031422082008.TakeThisOut@news.west.cox.net>,
Michelle Steiner <michelle.TakeThisOut@michelle.org> wrote:
>
>That does not address the fact that he still gets that whine with
>nothing plugged in to the inputs.
It's because has the gain all the way up; he's amplifying system noise.
--
There's no such thing as a free lunch, but certain accounting practices can
result in a fully-depreciated one. |
|
| Back to top |
|
| |
External
Since: Aug 22, 2008
Posts: 2
|
(Msg. 56) Posted: Fri Aug 22, 2008 8:45 pm
Post subject: Re: Whistle When Using Sound Card as Pass-Through [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
"Michelle Steiner" <michelle.TakeThisOut@michelle.org> wrote in message
news:michelle-357C10.11454722082008@news.west.cox.net...
> Do you have a reading-comprehension problem? I'm not saying anything
> for or about the symptom; I'm referring to the bogus cure being posited.
>
> Let me say it again, and I'll type slowly so you can read it better: If
> the whine happens without anything plugged in to the input jacks, how
> will a phono pre amp solve the problem?
And I'll type equally slowly so you can read it and maybe comprehend it. The
whine happens with nothing plugged in and the input volume cranked way, way
high. Use a preamp, which boosts the signal level, and you can then turn the
volume down, and the while will either go away or be much, much lower.
What part of that don't you understand?
Peace,
Paul |
|
| Back to top |
|
| |
External
Since: Aug 20, 2008
Posts: 6
|
(Msg. 57) Posted: Fri Aug 22, 2008 9:49 pm
Post subject: Re: Whistle When Using Sound Card as Pass-Through [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
On Fri, 22 Aug 2008 20:45:28 GMT, "Paul Stamler"
<pstamlerhell DeleteThis @pobox.com> wrote:
>> Let me say it again, and I'll type slowly so you can read it better: If
>> the whine happens without anything plugged in to the input jacks, how
>> will a phono pre amp solve the problem?
>
>And I'll type equally slowly so you can read it and maybe comprehend it. The
>whine happens with nothing plugged in and the input volume cranked way, way
>high. Use a preamp, which boosts the signal level, and you can then turn the
>volume down, and the while will either go away or be much, much lower.
>
>What part of that don't you understand?
Does this laptop HAVE any analogue amplification before the ADC where
the signal can be "cranked up"? |
|
| Back to top |
|
| |
External
Since: Aug 20, 2008
Posts: 13
|
(Msg. 58) Posted: Fri Aug 22, 2008 9:49 pm
Post subject: Re: Whistle When Using Sound Card as Pass-Through [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
"Laurence Payne" wrote ...
> Does this laptop HAVE any analogue amplification before the ADC where
> the signal can be "cranked up"?
I cannot recall when (if ever?) I last saw an analog input which
did NOT have a level/gain/sensitivity adjustment of some kind on
the input. Frequently a separate control on EACH input.
Clearly the unit in question has one, because the OP said that
he had to turn it to max to get even a slight signal out of it. And
the sample would appear to confirm that the gain staging at one
(or more) points is dramatically outside the design conditions.
This is supported by the statement that the OP is attempting to
feed a phono cartridge into the computer sound input. |
|
| Back to top |
|
| |
|
|
You can post new topics in this forum
You can reply to topics in this forum
You can edit your posts in this forum
You can delete your posts in this forum
You can vote in polls in this forum
|
|
|
|
FAQ
Search
Profile
Private Messages
Log in/Register/Password
Mac Forums
RSS | Data
Feeds | Advertise | Submit | Bookmark | Newsletter | Contact