Mac g5 no sound output
But why do you need iTunes to be messing with the EQ when you've got a home theater receiver that has a full fledged DSP chip that will likely do a far better job than iTunes could ever hope to? That might even be part of your problem, is that the receiver is expecting the output to be the nominal signal, no post-processing, then it does it's own post-processing, and things don't go so well. Whatever the case, screw iTunes' EQ, let your receiver work its magic. The resulting audio will likely be considerably better. And if you can do optical to and from, as you apparently can, even better, because then you have less signal loss from electrical resistance along the length of the cable like you have with analog cables pushing a signal over a copper wire.
The amount of signal lost over optical should be virtually zero. Even better than that, is it's a digital delivery system. So you don't have the signal being converted from digital to analog, sent over the wire, then converted back to digital from analog, just to be converted to analog again as it goes to the individual speakers. It can stay in a purely digital form until it gets sent to the speakers. Every conversion results in a little quality loss, and so the more data the receiver has to work with, the better the resulting sound.
You shouldn't need to be a big audiophile to detect a subtle difference between the two. Having worked in the the music industry for over 25 years as sound engineer in live production. Don't bother with ebay. And Monoprice's cables are pretty high quality.
Which DAC with Mac G5 tower as source, to Woo Audio 3 to AKG701s?
Let some other sucker pay about 3X too much. Yeah had a look at that site. Ah, yes, I sometimes forget that Canada, Australia, and I believe New Zealand, among a few other small African nations, use the same currency symbol. In any case, I'd still be a bit leery of buying something off someone on ebay. Most of the time, the deals really are too good to be true. You may pay a bit more buying it somewhere else, but you're generally assured that if it's a piece of junk, you can take it back. Discussion is locked. Follow Follow this discussion and email me when there are updates Stop following this discussion.
The 7. If samples are clocked using the internal clock, the data is run through the sample-rate converter on the digital circuitry.
Everything works fine except no sound?
Developers of applications that need this capability will need to provide access to the input clock recovery control. Audio signals from the audio input jack are converted to digital data internally. Audio data is converted to analog form for output to the internal speaker, the headphones, line output jacks, or external speakers. The Power Mac G5 computer also has the ability to lock its internal audio hardware to the incoming audio stream to synchronize the audio subsystem to an external device supplying the audio stream.
This function allows audio and video to play in sync with the external audio or video device. The external clock must be stable enough to be locked onto, otherwise the digital circuit will signal an error and the driver will fall back to using the internal clock. Incoming digital audio is automatically sample-rate converted to the selected output sample rate using the sample rate converter in the audio chip. The sample rate converter is high quality and does not use CPU bandwidth for audio conversion.
Based on playback of a 1 kHz, -1dBFS bit sine wave playback, bit The Power Mac G5 has a stereo audio line-in jack on the back panel. The audio inputs are designed to accept high-level audio signals: 2. The output level of some consumer audio devices is lower, often 0. Jonathan K, who had success with removing devices, writes:. The basic test ran and allowed me to look at the test results. However, the intermediate tests, quit at the end and automatically restarted. Since I was running from the CD, all reports were lost.
g5 audio input - Genius Bar Discussions on AppleInsider Forums
Some users who have been running into problems while optimizing volumes with TechTool Pro 4. Once optimization is finished, journaling can be turned back on with the same tool. Reader Markus Altendorff has also posted a few excellent demo sound files, and provided a few informative comments:. After installing the CHUD tools Apple, Developer software , disabling "CPU Napping" some sort of power-down mode during idle clock cycles makes the chirping go away see below for more details - the chirping does not disappear completely.
How audio streaming works
My guess and backed by a friend of mine, former electronics pro and now IT Since disabling CPU napping results in the CPUs consuming a fairly constant current, the vibrations stop the magnetic fields in the coils remain constant. The bad thing about this is that the chirping also shows at the USB and Firewire ports, causing trouble when you try to use this computer in a recording studio - the thread at Apple Discussions contains quite a few complaints about how the G5 is barely usable for audio production because of this.
What makes these issues more than just annoying for some users is that some of the noises are transferred via USB and FireWire connections, and some are amplified by connected audio equipment -- reader Catherine Vibert reports that a "whining" noise is actually transmitted to the DIGI in Pro Tools via Firewire. These issues make affected G5 computers unusable for digital audio work. Unfortunately, it's difficult for us to correlate noises with potential solutions because many people who have sent reports to MacFixIt have been vague about which noise their particular G5 is producing.
There are clearly different problems and different solutions. If you send us email on this issue, please state which of the above "noises" your Power Mac G5 is producing and which, if any, technique reduces which noise. Full-blown fans We've also received a number of additional reports of an issue where putting the G5 to sleep results in the fans revving up to full speed which is startlingly loud if you've never heard it.
Sometimes the situation can be resolved by waking the G5 up and then putting it back to sleep; however, sometimes the G5 will refuse to wake up, requiring a restart. We had this happen once to our G5 here at MacFixIt. It appears that Apple technical support is recommending a PMU power management unit reset to some customers who are having fan irregularity problems. We've also managed to scrounge up a few unorthodox workarounds, including placing a thick pad of paper underneath the G5 to prevent vibration:. MacFixIt reader Paul Burton is one of the handful of G5 owners who experienced a problem where the system goes to sleep, the fans rev to full speed, and the G5 cannot be woken.
Of course, it was the first time he had heard of such an issue with a G5. That said he suggested resetting the PMU pressing a button on the logic board inside the tower:. Meanwhile, Stan Goldberg found that putting a thick pad of paper under his G5 - which started making excessive noise after a few days of quiet operation - helped to dampen the vibration of the G5's case against his desk, eliminating one source of unwanted noise:. I was amazed how silent it was. Then after the loud rev up upon sleep occurred after about five days the front fan seems to have come on and makes a consistent humming fan noise and won't turn off.
There is also high pitch sounds that come and go and seem to be due to vibration. Putting thick paper pads under the lower supports helped with the vibration transmission to my wooden desk.
If Processor Performance is turned to Automatic or Reduced, the noise is quieter, but still noticeable to some discriminating ears. Oddly or perhaps not the problem disappears when iTunes' visualizer is turned on for many users.
A thread on Apple's discussion boards pertaining to this issue contains nearly posts. Apple has be unable to offer any solution other than to replace the power supply, with no guarantee that the replacement will solve the problem. The only way to stop them is to hold the power button for 5 seconds to shut off the computer. The most widely reported successful repair procedure involves replacing the G5's power supply unit.
Customers have been hit-or-miss in their success obtaining this repair from Apple. There are pops, clicks, sound dropout and something that I can only describe as digital 'wow and flutter' - I thought that had been consigned to history with the vinyl disc.
However, as previously noted, this workaround only muffles the artifacts to an inaudible level in some set-ups. In highly sensitive, amplified sound environments, the chirps, beeps, and other strange noises are still noticeable. Most reports indicate that the audio problems become worse after the G5 has been on for several minutes, or a processor intensive operation is taking place.
I have two at work identical that don't exhibit that behavior, and when I ran the Extended Hardware Test, it worked fine. Boy, do the fans get loud during those tests It booted and ran fine with the door removed.
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Apple Knowledge Base article holds the solution.