Slow rendering - and very little CPU usage

kristianberg · Post by **kristianberg** » Wed Jan 09, 2013 4:35 pm

I run Live 8.3.4 on my new Macbook Pro 2.6GHz quad-core i7 with 8GB ram, OSX 10.8.2

When rendering on my old Dual-core, Live would use 100% of the CPU power. But with the new quad-core, Live only use about 10% CPU power, and rendering takes about the same time as on the old dual-core.
In preferences, multicore support is turned ON.

Has anyone else experienced this?

Why can't Live use more CPU power when rendering?

doom_Oo7 · Post by **doom_Oo7** » Wed Jan 09, 2013 5:06 pm

If you use outboards effects or synths live will render in real time, so it will always be the same speed.
Else, it's a bug ^_^

kristianberg · Post by **kristianberg** » Wed Jan 09, 2013 6:31 pm

Thanks for the reply.

No external hardware used. The render time follows the amount of tracks and plugins.

kristianberg · Post by **kristianberg** » Thu Jan 10, 2013 10:57 am

Just tried with the Live 8.4 Beta 9, and unfortunately it renders with the same speed.

Any more ideas what to do?

Piplodocus · Post by **Piplodocus** » Fri Jan 11, 2013 1:53 am

Depending on the project it might be limited by the hdd. My rendering seemed to get a lot faster with an ssd.

Piplodocus · Post by **Piplodocus** » Fri Jan 11, 2013 1:54 am

Piplodocus wrote:Depending on the project it might be limited by the hdd. My rendering seemed to get a lot faster with an ssd.

What does your disk usage indicator say when it's rendering?

timothyallan · Post by **timothyallan** » Fri Jan 11, 2013 2:39 am

Welcome to the world of single core rendering.

There's a thread on the Live 9 beta forums about this as well, it's still the case with Live 9.

kristianberg · Post by **kristianberg** » Fri Jan 11, 2013 10:08 am

Thanks for replays!

Just rendered a project with only Live's built-in plugins, but lots of them. CPU usage 10%, Disk usage peak 2,8MB/S...

Will check out the Live 9 thread.

timothyallan · Post by **timothyallan** » Fri Jan 11, 2013 11:18 am

Some 3rd party plugs do oversampling on render too, slowing things down, but making them sound better in the end... usually

Timbeaux · Post by **Timbeaux** » Fri Jan 11, 2013 11:23 am

same here. same speed on i72600 as on c2d 2,6 ghz. thats why its called ableton "live" narf

kristianberg · Post by **kristianberg** » Fri Jan 11, 2013 5:02 pm

Got answer from Ableton support: "Live uses only one core for rendering, even on multi-core machines".

Hope that changes in the no to far future..

Timbeaux · Post by **Timbeaux** » Sat Jan 12, 2013 3:48 pm

i got a nice experience today. when u render a song the ableton sends a midi signal in the same tempo as it is rendering. lol

Slow rendering - and very little CPU usage

Slow rendering - and very little CPU usage

Re: Slow rendering - and very little CPU usage

Re: Slow rendering - and very little CPU usage

Re: Slow rendering - and very little CPU usage

Re: Slow rendering - and very little CPU usage

Re: Slow rendering - and very little CPU usage

Re: Slow rendering - and very little CPU usage

Re: Slow rendering - and very little CPU usage

Re: Slow rendering - and very little CPU usage

Re: Slow rendering - and very little CPU usage

Re: Slow rendering - and very little CPU usage

Re: Slow rendering - and very little CPU usage