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Slow audio rendering. P4 machine performs faster than Core i7 ?!

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Omer AydinSlow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 16, 2012 at 8:02:23 am

Recently I have upgraded to a Core i7 system with Vegas 9 (64bit), unfortunately my old P4 system (with WinXP 32bit + Vegas 6) appears to render faster than my new machine.

NEW System Config: Core i7 3370 @3.4Ghz + Win 7 SP1 64bit + Vegas 9 (64bit)

Source..........Output..........Length..........Render time..
-------------------------------------------------------------
wav.............wav.............10 min..........40 secs......
wav.............mp3(256kbit)....10 min..........41 secs......


OLD System config: Pentium 4 @3.0Ghz + Windows XP SP3 32bit + Vegas 6

Source..........Output..........Length..........Render time..
-------------------------------------------------------------
wav.............wav.............10 min..........22 secs......
wav.............mp3(256kbit)....10 min..........12 secs......


These are audio production rigs so tests are made with audio track only. Project is a 1 track 10 minute stereo 44khz 16-bit WAV file inserted in timeline and rendered with no SFX.

Any ideas why this is happening?
I'd be glad to hear any solutions. If you want more details or further tests, just ask me.

edit:
Soundforge 9 renders the same wav file into mp3 less than 3 secs.
I have tested it with Reaper also. It renders in 2 secs.
I guess it's not a audio codec issues since these apps work fine.



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Mark BartonRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 16, 2012 at 3:17:15 pm

You proved the 32bit codecs do not have a problem, but Vegas 9 64bit needs a 64bit codec. Can you test with Vegas 9 32bit to see if it is a problem with the 64bit codec?


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Omer AydinRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 16, 2012 at 5:43:21 pm

Thanks for the reply Mark.
Reaper is an 64bit application and it renders in 2 secs. I assume it uses 64 bit codecs.

I'd like to test it with Vegas 9 32 bit unfortunately, I don't have it.
I'd be glad if anyone running Vegas 9 32bit on Windows 7 could do this quick test and post the result here. It'll only take a minute or two.

Open a New project and insert an audio file (any Mp3 >128Kbit OR a WAV 44khz 16bit )in timeline, then make it 10 minutes in length, then render into a 44khz WAV file. How long does it takes to render?
Thanks in advance.



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Matt CrowleyRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 16, 2012 at 6:22:13 pm

Are you by any chance using the "real time audio render" feature, instead of the normal "render as..." ? If you have 10 mins of audio on the timeline, then the realtime render will take 10 mins (or slightly more).

A normal audio-only render should only take seconds, like Reaper and Soundforge. I use Movie Studio 10 and even on an old machine it's only a matter of seconds to render several minutes of audio out to WAV.


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Omer AydinRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 16, 2012 at 7:05:34 pm

No, Matt, I use Render as... to render.

Could you please render a 10 minute WAV file using Render As.. just to see how many seconds it takes with your version of Vegas?


BTW, I have run the same test on another machine with Core i7 960 @3ghz Win7 64bit with Vegas Pro 10 64bit and it took 27 seconds to render a 10 minutes WAV file while with SoundForge 10 and Reaper 64bit it took less than 3 seconds.

I think there is something wrong with Vegas 9 (and 10) about the way it handles audio.

I installed a Vegas 6 on the first Core i7 machine I mentioned in my initial post and it just rendered normal just like Soundforge and Reaper.



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Mike KujbidaRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 16, 2012 at 7:18:17 pm

Omer, I just tried this with Pro 10 and Pro 11 and each time it took less than one second to do the render.


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Omer AydinRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 16, 2012 at 7:59:19 pm

Thanks Mike.
Is that VP10 a 32bit or 64bit?



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Mike KujbidaRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 16, 2012 at 8:00:10 pm

Omer, it was 64 bit.


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Mark BartonRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 16, 2012 at 7:38:42 pm

It took 2 seconds with Vegas Pro 12.


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Omer AydinRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 16, 2012 at 8:07:02 pm

Thanks all for the replies.

Any Vegas 9 64/32 user..?



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Mike KujbidaRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 16, 2012 at 9:15:00 pm

15 sec. on Pro 9 32 bit with a Intel Core 2 Quad Extreme (QX6700 QuadCore).
The other tests were on an i3.


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Omer AydinRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 17, 2012 at 10:46:52 am

I guess your V9 32bit has the same issue with mine. Even your time is better than mine(~40secs), 15 secs is still too much for a simple audio render, considering that it's just a simple read/write process.



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Mike KujbidaRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 17, 2012 at 11:15:58 am

I just tried it on my home machine (32 bit) with Pro 7, 8 and 10 and they were all 15 sec. renders.


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Mark BartonRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 16, 2012 at 8:24:53 pm

Did you check the Audio Device Type under Sony Vegas Pro Preferences? Mine is set to Microsoft Sound Mapper. This setting would be specific to Vegas Pro where you are seeing the slow down.


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Omer AydinRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 17, 2012 at 10:39:18 am

I'll try that as soon as I get back to the studio.
Mine is set to audio device (M-Audio C400) directly due to some custom i/o adjustment requirements. M-audio router settings are not accessible under Sound Mapper unless you select the M-audio device driver.



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Omer AydinRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 17, 2012 at 6:27:51 pm

I have tested it on 2 systems, one with V9 (64) and the other V10 (64) but nothing changed. They still render slower than a P4 machine running V6.



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Dave HaynieRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 19, 2012 at 4:53:07 am

I rendered 10min of MP3 to a WAV output. I don't have Vegas 9 installed anymore, or any 32-bit version. The 64-bit Vegas 10 rendered it in 15seconds. The 64-bit Vegas 11 rendered it in 3 seconds, about the same as Sound Forge 10.

Vegas 12 actually refused to import the MP3 files. Ouch!

-Dave


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Mark BartonRe: Slow audio rendering. P4 machine performs faster than Core i7 ?!
by on Oct 19, 2012 at 6:56:19 am

I just tried again with version 12 and it imported my mp3 just fine and renders the wav file. Wonder why you cannot import mp3 files.


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