Originally posted by RealNC
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Ubuntu Desires Lower Audio Latency For Gaming
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Originally posted by JS987 View PostDifferent people have different needs. Onboard sound cards and my discrete sound card support 192 kHz. That $235 sound card has some crappy parts if it supports only 96 kHz.
HW mixing can be advantage in some cases, but it isn't option in many cases. If I would have to buy new sound card tomorrow I would still buy sound card without HW mixing because there is no reasonable priced card with HW mixing
which provides high quality sound to my headphones, which is most important to me. Using two sound cards is unacceptable because it isn't possible to connect one headphones to two sound cards at same time.
You can use two sound cards at the same time by passing the line output of one to the line input of the other, then your headphones into the headphone output of the second. Finally, unmute the Line In on your second sound card's mixer.
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As this is a thread about latencies, if anybody is interested in frame latencies in Doom 3, please see my thread in the Gaming section:
Frame latency analysis on Doom 3
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Originally posted by RealNC View PostNo, they cannot. You're confusing the dmix device with the hardware device.Last edited by Detructor; 06 November 2012, 04:33 AM.
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Originally posted by Detructor View Postuhm, dmix is part of ALSA. So yes, it (ALSA) can do software mixing. Also dmix is (usually) enabled by default (unless the sound card is able to do hardware mixing or you are using a very weird system with very strange options on the compiler side. I've never seen a linux system with ALSA that was not able to softwaremix without a soundserver. And I've seen quite some systems).
What on earth are you arguing about?
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If they want lower latency for games, and also less-jitter (better performance) they need to enable low-latency desktop.
That alone will improve latency to probably around 1ms. And makes games graphics so much better aswell.
With a professional firewire audiocard, I have actually run audio at 0.33ms latency with a custom kernel. This does not seem to work on standard HDA chips though, but 1ms will do. And 0.33ms latency uses a great amount of CPU. So, for the time being, until audio-subsystem is optimized for low latency, 1ms will be good enough, and if you want to ensure minimal cpu usage, just set it to 5ms latency, for normal "close" pc-speakers or monitors, and it will be fine aswell.
That does not mean I don`t want lower, but at the current time being, I would recommend that. Ultimately 0.2ms latency, should give a "close to hardware" feeling.
PS: Ubuntu might need realtime group, to a higher priority, to run 0.33ms latency.
Peace Be With You.
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