image description


Daisy chained FP10's causing playback latency?
  Forum Index » Digital Audio Recording 
Author
Message
cincyfan04
Prenoob

Joined: 09/09/2010 06:19:29
Messages: 20
Offline

I have two FP10's that I have daisy chained. Recording is not an issue, but I am getting pops and crackles on playback. If I revert back to one FP10 as my asio (disable aggregate device, select FP10), the pops and crackles disappear. Any thoughts? I assume a daisy chained FP10 commands a much larger CPU load?

Hardware Overview:

Model Name: iMac
Model Identifier: iMac10,1
Processor Name: Intel Core 2 Duo
Processor Speed: 3.06 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 3 MB
Memory: 4 GB
Bus Speed: 1.07 GHz


Cubase Studio 4
Version 4.5.2.274

Presonus Firepod/FP10 - 2 daisy chained (set up as aggregate device to utilize 16 inputs)
hue
Presonic
[Avatar]

Joined: 27/08/2010 07:54:06
Messages: 227
Location: Vancouver BC, Canada
Offline

One posting should be enough. If you need to bring it to attention again just "bump" it up with your own reply.

Secondly, if no one has answered you it's probably because they either don't have an answer or they haven't had the time to read your post.

I don't think daisy chaining would cause excessively noticeable latency. If your latency was bad previous to daisy chaining, of course it will be worse with the piggy back setup. What are your buffers set at? Which unit do you have set up as master. Is there word clock involved?


Elliot Easton: "(You make me feel so bad, I wish I was back sleeping in) The Testicles Of My Dad"- Renaming the song performed by Dan Alder @ Guitar Superstar 2010
[MSN]
cincyfan04
Prenoob

Joined: 09/09/2010 06:19:29
Messages: 20
Offline

I posted under both forums because I wasn't sure which place it should go. Not because I didn't think someone had an answer.

I have and FP10 that is hooked up to a Firepod (I'm not sure which model name came first, but I bought the firepod much earlier). The firepod is connected to my iMac and the main signal is coming out of the Firepod to my studio speakers. I didn't have any noticeable latency before on playback with just one hooked up. And it goes away when I remove the second and go back to a single ASIO.

I tried to attach screenshots but for some reason the site kept giving me an error when I submitted. So I'll try to explain the settings

Under Audio Devies (iMac system preferences)
Aggregate Device
Clock Source: Nothing selected (will not give me option to select)
Presonus Firepod (1365) 10 in 10 out (resample box checked)
Presonus FP10 (1060) 10 in 10 out (resample box checked)

Under Device Setup (Cubase)
Asio Driver: Aggregate Device
Release Driver not checked
Input Latency: 0.726ms
Output Latency: 0.726ms
Sample Rate: 44100.0hz

Advanced Options:
Audio Priority: Boost
Multi processing box checked
Disk preload: 6 seconds
Adjust for record latency box checked
Record shift: 0 samples <----not sure what this should be

Thanks
hue
Presonic
[Avatar]

Joined: 27/08/2010 07:54:06
Messages: 227
Location: Vancouver BC, Canada
Offline

I don't think you want to create an aggregate device. You want to use a single ASIO and use the First FP10 as master and the second as a Slave. Master clock from the first FP10. From my understanding an aggregate device on a mac is like chaining them in parallel. You can do this with your onboard soundcard and the FP10 but when daisy chaining, allow your DAW to assign priority to your interfaces. The only setup you should need to do is within your DAW. So if OSX asks you if you want to create an aggregate device when you plug in the second FP10 you should say NO. Do the setup in your DAW and it should work fine.

Elliot Easton: "(You make me feel so bad, I wish I was back sleeping in) The Testicles Of My Dad"- Renaming the song performed by Dan Alder @ Guitar Superstar 2010
[MSN]
cincyfan04
Prenoob

Joined: 09/09/2010 06:19:29
Messages: 20
Offline

According to the documentation provided by Presonus, in order for me to take advantage of using two FP10's at one time, I have to set them up as aggregate devices.

http://www.presonus.com/kb/default.aspx?d=^FP10%20(FirePod)^MAC-How%20do%20I%20daisy%20chain%20multiple%20FP10%20(FirePod)s%20in%20OSX.htm

(you"ll have to copy paste the link, the site cuts off the hyperlink)

I don't think there's any other way to do it. I tried using them without setting them as aggregate and I couldn't create a slave. I only tried the aggregate after I searched and realized that Presonus had the article in their knowledge base.

Maybe I'll email or call them.

This message was edited 1 time. Last update was at 09/09/2010 08:05:21

cincyfan04
Prenoob

Joined: 09/09/2010 06:19:29
Messages: 20
Offline

Still having this issue and my tech support ticket got closed - I think because I didn't register my product. Do I have to have the original documentation to register or is the info on the unit? I have moved three times since I bought my first FP10 and I've already gone looking for the original docs.
hue
Presonic
[Avatar]

Joined: 27/08/2010 07:54:06
Messages: 227
Location: Vancouver BC, Canada
Offline

Try it without creating an aggregate device. Plug your FP10s in as instructed, then in Cubase see if you can enable the vst inputs for the other Fp10. Make sure that the first of your FP10s is set as master.
Elliot Easton: "(You make me feel so bad, I wish I was back sleeping in) The Testicles Of My Dad"- Renaming the song performed by Dan Alder @ Guitar Superstar 2010
[MSN]
cincyfan04
Prenoob

Joined: 09/09/2010 06:19:29
Messages: 20
Offline

Again, I can't. I've already done that. In the Device Setup, you can only select one ASIO device. Even with both FP10's plugged in and synced (blue light), the VST Connections only allows you to select from the 10 inputs from whichever FP10 is selected on the Device Setup screen.

Per their document: "In order to take advantage of multiple FP10/FirePod(s) in OSX, you will need to use the Aggregate Device Editor, which is only available in OSX version 10.4.x or later"

hue
Presonic
[Avatar]

Joined: 27/08/2010 07:54:06
Messages: 227
Location: Vancouver BC, Canada
Offline

If both FP10s have blue lights, they must be sync'd. I'm not trying to be an ass. I just want to get this straight. You went to Options/system/audio/vst inputs and you can't select and enable the inputs on the secondary FP10? I just find this weird because, you can't create aggregate devices in Windows but you don't need to in order to chain the FP10s. You only need one ASIO driver to run them all. When you open up universal control do you see the second unit?
Elliot Easton: "(You make me feel so bad, I wish I was back sleeping in) The Testicles Of My Dad"- Renaming the song performed by Dan Alder @ Guitar Superstar 2010
[MSN]
cincyfan04
Prenoob

Joined: 09/09/2010 06:19:29
Messages: 20
Offline

I'm running a mac so it requires an aggregate device. Presonus created a document specifically for it. The only reason I know the document exists is because I originally tried to set it up the way you suggested and I could only get 10 inputs. A quick search on the knowledge base and apparently it's a common issue. Windows is apparently different. I'm not sure why both FP10's are synced, they both show up in the audio device list, maybe that's it. But I've tried hooking up the two separately into the mac (two firewire cables into two inputs) and as daisy chain. They only both work as aggregate devices hooked up together.

It could be as simple as - "hey, when you daisy chain, it drains more memory" but I'm not sure. the VST performance meter is barely even registering a work load.
talmen
Presonoid
[Avatar]

Joined: 28/07/2010 23:56:13
Messages: 3002
Offline

I would try messing with some of the advanced options settings for the aggregate device and seeing what happens (uncheck multiprocessing, etc.). Might not help, can't hurt. I would think with your rig you shouldn't be having a problem playing back.
Field Kit:
MacBook Pro 9.2 i5 2.5 GHz, 8GB RAM,
OS 10.8.5;
A & H Qu-16, AB1818VSL, Alesis IO14 / IO26,
PreSonus S1 v2.6.2.25990, Boom Recorder 8.3.2

Studio Kit:
iMac 11.3, i7 (Quad) 2.93GHz, 8 GB RAM,
OS 10.9.3,
M-Audio FW1814, PreSonus Faderport,
PreSonus S1 Pro 2.6.2.25590
hue
Presonic
[Avatar]

Joined: 27/08/2010 07:54:06
Messages: 227
Location: Vancouver BC, Canada
Offline

Okay. I haven't used Cubase in about 3 years now and that was SX1. I see that some of the setting have changed. No I don't own it. I've been trying to decipher the manual. If you go to Devices/Device Setup/VST Audio System/Asio Presonus FireStudio. At any rate, it seems to me it's time to contact tech support. I don't know why you should have to create an aggregate device. They are synced, you can see them in Devices, they should piggy back off each other using the same ASIO.

It seems to me they are trying to implement Apples Aggregate device technology, which in itself seems pointless if it worked fine in older versions of the OS.
Elliot Easton: "(You make me feel so bad, I wish I was back sleeping in) The Testicles Of My Dad"- Renaming the song performed by Dan Alder @ Guitar Superstar 2010
[MSN]
talmen
Presonoid
[Avatar]

Joined: 28/07/2010 23:56:13
Messages: 3002
Offline

AFAIK, ASIO isn't really used on Macs much, if at all. Virtually all devices I see these days take advantage of Macs CoreAudio system. Setting up as aggregate devices sounds correct to me. The software just wants to connect with something, but it can only connect with one device, and aggregate devices just allows the software to interface with the two as if it were one. I'd be surprised if tech support couldn't give you a hand with getting the appropriate settings to make it hum.
Field Kit:
MacBook Pro 9.2 i5 2.5 GHz, 8GB RAM,
OS 10.8.5;
A & H Qu-16, AB1818VSL, Alesis IO14 / IO26,
PreSonus S1 v2.6.2.25990, Boom Recorder 8.3.2

Studio Kit:
iMac 11.3, i7 (Quad) 2.93GHz, 8 GB RAM,
OS 10.9.3,
M-Audio FW1814, PreSonus Faderport,
PreSonus S1 Pro 2.6.2.25590
cincyfan04
Prenoob

Joined: 09/09/2010 06:19:29
Messages: 20
Offline

Thanks Talmen. I'm going the tech support route now. I was having the hardest time locating my serial numbers for the products. I found one of em (cause I bought it like 4 months ago) but the other is a mystery. I've had it for almost three years so it might be tough to locate in my jumbled mess of recording gear registrations. I was able to find my Faderport and TubePre registration too. Still looking for the firepod and EQ3B.
hue
Presonic
[Avatar]

Joined: 27/08/2010 07:54:06
Messages: 227
Location: Vancouver BC, Canada
Offline

Well, I used ASIO devices with my iMac. It was a while ago though and with the first generation Intel dual core cpus. OS X 10.4.1 at the time. I've owned a few macs. It seems like a bit of a workaround to me.

Just on the off chance, did you try using the Core Audio drivers instead of ASIO? It makes sense to me that if you are going to make use of the Aggregate device tech, you need to make use of the Core Audio Drivers since that is how the technology is designed.

Edit: Right so choosing the Aggregate device defaults to Core Audio I assume. Sorry. This is how I troubleshoot. It's easier if I have the same setup. But when I don't I just go through it all in my head. Sometimes my head doesn't imagine it the same way as what it is in reality. Troubleshooting is my thing. That and crossword puzzles.

This message was edited 1 time. Last update was at 22/09/2010 08:26:46

Elliot Easton: "(You make me feel so bad, I wish I was back sleeping in) The Testicles Of My Dad"- Renaming the song performed by Dan Alder @ Guitar Superstar 2010
[MSN]
 
Forum Index » Digital Audio Recording
Go to: