Changing Buffer settings
Printed From: Lynx Studio Technology, Inc.
Category: Lynx Forum
Forum Name: Lynx Support Forum
Forum Description: Discussions about Lynx Hardware & Software
URL: https://www.lynxstudio.net/forum/forum_posts.asp?TID=5612
Printed Date: May/13/2024 at 4:06pm
Software Version: Web Wiz Forums 11.04 - http://www.webwizforums.com
Topic: Changing Buffer settings
Posted By: Sonicsix
Subject: Changing Buffer settings
Date Posted: March/24/2015 at 3:27pm
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Hi I'm having the dreaded Pro Tools error -6101 CPU overload with minimal tracks, that suggests raising the playback buffer. I usually can't go any lower than 512 for an 88.2 session without freezes. This gives noticeable latency. I'm curious if I should be adjusting the buffer settings in the Lynx mixer window to get better performance? If I try to adjust it, it doesn't change. Is this normal? Has anyone else encounter these issues? Setup is: Mac pro 2 x 2.8 quad-core processors 24 gigs of 800mhz ram 2 x Lynx aes16e cards (set to receive sync from Digital 8) 1 x Aurora 16, 1 x Aurora8 (set to receive sync via external bnc cables) 1 x UA 2192 connected via digital 8 on AES 16e ( sync set to internal and sending sync via bnc to Auroras) Lynx mixer 1.0 build56A AES16e firmware version 13.1 Aurora 16vt and Aurora 8 firmware version 28 Pro Tools 10.3 and 11 settings in PT playback engine settings: PT Aggregate h/w Buffer size 256 samples Host Processors 7 CPU usage 90% Ignore errors unchecked Delay Compensation MAx Cache 14gb Plug in Buffer Default level 2 250 ms
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Replies:
Posted By: PaulTech
Date Posted: March/30/2015 at 4:16pm
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The buffer size should be set within ProTools, not from the Lynx Mixer. That shouldn't have anything to do with the performance problems though. Your settings seem OK, you should be getting much better performance than that. Is it possible that there is a plug-in that is creating havoc? You might try instantiating them one at a time and see if any make the CPU number shoot up. Can you test with just one card (instead of using the aggregate) and see if the behavior changes? Also, with the aggregate device make sure that Drift is OFF for both devices. You can check that from Audio Midi setup. Generally drift is turned ON for the second card in an aggregate and that can cause problems. ------------- Paul Erlandson Lynx Studio Technology Support 714-545-4700 x 206 http://www.facebook.com/lynxsupport" rel="nofollow - Lynx Support and Updates on Facebook! |
Posted By: Sonicsix
Date Posted: May/29/2015 at 5:48pm
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I think this is something to do with my sync errors that I keep having. When I change sample rates for different sessions recorded at different rates I keep getting sync slipping out and the ring modulated audio sound constantly. Then after switching sync sources all around and back, it works for a little while and sometimes falls out of sync again, or sometimes works. I'm going to try to change my clock chain, before suicide. Was set up as: UA 2192 set to internal (connected audio to digital channels 31/32 on digital in 8)> bnc cables to Aurora 16 set to external, and Aurora 8 set to external> both AES 16's set to external via digital in 8 (ua2192) Now going to try: Aurora 16 internal > Aurora 8 set to external via bnc or aes?> UA2192 set to external via bnc or ads?> both AES 16e's set to external on digital 1. Does this seem like the best option?
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Posted By: Sonicsix
Date Posted: May/29/2015 at 6:20pm
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I guess since there is only 1 bnc clock out connector on the Auroras, I'll try syncing the Aurora 8 and the UA 2192 via aes. edit: OK so I have tried this and it seems to be working for the moment. An interesting thing is that on the Lynx mixer app, my preferrewd clock source digital 8 window is showing a clock sample rate of 33khz. Could it be that the clock chip is shot in my UA 2192?
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Posted By: Sonicsix
Date Posted: May/30/2015 at 1:01pm
Ok that didn't work. I've now sync'd the Aurora 8 to the aurora 16 via bnc and will see how that works. Synchro lock seems on. Seems good so far, time to test....
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Sonicsix wrote:Posted By: PaulTech
Date Posted: June/02/2015 at 5:13pm
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Definitely keep an eye on the rate off of the 2192. If our frequency counter keeps showing errant rates like that there may be an issue with either a setting or a hardware problem to look at. Try different clock cables before going exploring to far down that road though... ------------- Paul Erlandson Lynx Studio Technology Support 714-545-4700 x 206 http://www.facebook.com/lynxsupport" rel="nofollow - Lynx Support and Updates on Facebook! |
Posted By: Sonicsix
Date Posted: June/04/2015 at 11:02am
| Thanks Paul. It appears to be randomly loosing sync and playback is gradually more ring modulated, even after I have changed the master to my Aurora 16 and have everything slaved to it. Sometimes I can get the ring modulated sync lost sound to disappear temporarily, by going into the mac audio midi setup and switching the clock source for the pro tools aggregate I/O 1: aes16e to 2: aes16e. I just changed the sample rate from 44.1 to 48k for a session and in the Lynx mixer the AES 16e card #2 is cycling a red bar under the syncrolock range. If I click preferred clock source to external ( sample rate not present) and back to Digital in 1, it locks on the sample clock screen in the mixer window. Does this seem like some sort of software switching problem? Is there any other tests I can do to check hardware or software issues? There are some gremlins here playing with me for sure. |
Posted By: Sonicsix
Date Posted: June/04/2015 at 11:04am
| I will temporarily disconnect the 2192 completely to see if it is causing any problems also. |
Posted By: Sonicsix
Date Posted: June/04/2015 at 11:17am
| Another thing I am noticing at the moment, is the 2: AES16e in the Lynx mixer's sample clock current source is set to internal and won't change. Even though the sync source is set to Digital in 1. Is this any clue? |
Posted By: PaulTech
Date Posted: June/04/2015 at 5:01pm
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That is a clue. The current source is what is actually being used. Chances are when you changed clock source, you had an audio application open. By default the card does not switch rates while open by an app. You can resolve this be either closing the app prior to changing the source, or in the Lynx Mixer you can click settings > advanced > Allow clock change if active. When this is selected, the card can change source even with an audio app open. ------------- Paul Erlandson Lynx Studio Technology Support 714-545-4700 x 206 http://www.facebook.com/lynxsupport" rel="nofollow - Lynx Support and Updates on Facebook! |
Posted By: Sonicsix
Date Posted: June/05/2015 at 9:21am
| Ok Allow clock change let me change the clock source. I am still getting a slip though. 2 minutes into a mix the ring modulated audio crept in. What is the recommended sync setup here. Should I purchase a AES16e header jumper and sync with the AES16e with the Auroras sync'd external to them? |
Posted By: Sonicsix
Date Posted: June/05/2015 at 1:09pm
| Also just noticed the second AES16e and Aurora 8 being noticeably time delayed, but without the ring modulated distortion. I cycled the clock source in Mac os's from AES16e 1 to aese 2 and back to aes1 and it is back in time. ..... |
Posted By: PaulTech
Date Posted: June/05/2015 at 5:13pm
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WHat happens if you use a single AES16e instead of the aggregate device. Any better? ------------- Paul Erlandson Lynx Studio Technology Support 714-545-4700 x 206 http://www.facebook.com/lynxsupport" rel="nofollow - Lynx Support and Updates on Facebook! |
Posted By: Sonicsix
Date Posted: June/06/2015 at 10:11am
| Yes it seems to be fine when not using aggregate device and only 1 interface. |
Posted By: Sonicsix
Date Posted: June/06/2015 at 11:41am
| Today while switching from 44.1k to 88.2k (still set as master to Aurora 16 interface), the Lynx mixer doesn't change the sample rate in rate select. If i cycle the preferred clock source in the Lynx mixer, from internal on 1: AES16e (Digital 1 on 2:AES16e) to external and back it changes the rate to 88.2. Not sure what is hanging up here |
Posted By: PaulTech
Date Posted: June/08/2015 at 3:45pm
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Are you sure that Rate Lock is OFF in the Lynx Mixer for both cards? It should be Also, for your aggregate device make sure that card #1 is listed first and that Drift is turned OFF for both devices. ------------- Paul Erlandson Lynx Studio Technology Support 714-545-4700 x 206 http://www.facebook.com/lynxsupport" rel="nofollow - Lynx Support and Updates on Facebook! |
Posted By: Sonicsix
Date Posted: June/16/2015 at 11:47am
| Yes, Rate Lock is off, Card 1 is listed first, and Drift is off. It has been acting up a bunch the last few days. I've connected the 2192 back up as a master clock only (no AES connections) and it seems to be cooperating at the moment. man this is frustrating. |
Posted By: PaulTech
Date Posted: June/16/2015 at 4:40pm
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You also might have a corrupted aggregate device. You might consider trashing your aggregate and starting over (remember to keep Drift OFF) You also might consider getting the ICC cable so you can explore another clock option. With the ICc cable you could do: AES16e #1 - Internal AES16e #2 - Header Auroras - AES A Also, are you certain that the ring modulation does not improve when you increase the buffer size? Lastly, open Console from Utilities. Set to show "all messages". Do a search for ">>>" . This will reveal any messages sent up from the Lynx driver. Copy a range where the problem happened and email those to support@lynxstudio.com, referencing this forum thread. There may be a clue there. Also, since card #1 worked by itself, what about trying card #2 by itself? Have the card on Internal and its connected Aurora on AES A. It would be good to know if there is a hardware problem and this step could narrow it down. ------------- Paul Erlandson Lynx Studio Technology Support 714-545-4700 x 206 http://www.facebook.com/lynxsupport" rel="nofollow - Lynx Support and Updates on Facebook! |
Posted By: Sonicsix
Date Posted: June/18/2015 at 9:25am
| Thanks for all the Help Paul. I've deleted the Aggregrate, and haven't had a problem with sync dropping yet so far. I will keep working and see if this does it! |
Posted By: PaulTech
Date Posted: June/18/2015 at 12:45pm
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Ah, good news!
------------- Paul Erlandson Lynx Studio Technology Support 714-545-4700 x 206 http://www.facebook.com/lynxsupport" rel="nofollow - Lynx Support and Updates on Facebook! |
Posted By: Sonicsix
Date Posted: June/20/2015 at 11:07am
| This is back using the 2192 as a master. At the moment it is without the aes hooked up on the 2192. As soon as I get caught up on sessions I'll try to hook up the AES connectors and see how thing work. |
Posted By: Sonicsix
Date Posted: June/24/2015 at 5:21pm
| Ok, so I'm noticing that in the Lynx mixer that the external source (bnc?) sample rate isn't showing anything present, when I have the 2192 set as a master and feeding sync through bnc. Is this a problem? The Sample rate on the lynx mixer window for the digital 8 on aes16e 2 (2192 AES connection) is showing up as the correct sample rate now after deleting the PT aggregate.. In this arrangement, should the syncro lock be turned on? |
Posted By: Sonicsix
Date Posted: June/25/2015 at 3:59pm
| Ok, as soon as I switched from 44.1 to 88.2 it went haywire again. I'm taking the 2192 out of the chain again and will try to see if I can get it to sync with the Aurora Lynx16 being the master. I also ordered an ICC cable to try to sync via AES16e like you mentioned. I will post a follow up after it arrives. |
Posted By: PaulTech
Date Posted: June/26/2015 at 4:07pm
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EXt not showing a rate is definitely a problem. Are you sure that the cable set that the 2192 wordclock is connected to is on Port A (digital in 1-4)? ------------- Paul Erlandson Lynx Studio Technology Support 714-545-4700 x 206 http://www.facebook.com/lynxsupport" rel="nofollow - Lynx Support and Updates on Facebook! |
Posted By: PaulTech
Date Posted: June/26/2015 at 4:08pm
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You also might check if it can successfully slave to the 2192 digital input signal, rather than wordclock... ------------- Paul Erlandson Lynx Studio Technology Support 714-545-4700 x 206 http://www.facebook.com/lynxsupport" rel="nofollow - Lynx Support and Updates on Facebook! |
Posted By: Sonicsix
Date Posted: June/28/2015 at 4:48pm
| Yes I was using AES A as digital in sync, but the 2192 is connected and showing up on AES16e 2 Digital in 8. |
Posted By: Sonicsix
Date Posted: July/06/2015 at 1:15pm
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The ICC cable showed up today and I have it installed and set up as: AES16e 1 master (internal sync), AES16e 2 slave (Header sync), both Aurora's set to AES A sync, and UA 2192 set to Word clock in (bnc from AES16e 1) Everything seems to be switching sample rates pretty smoothly so far. I had tried running 2192 to sync with AES in sync and It was showing up as incorrect sample rate in the Lynx Mixer Digital in window, seems good on BNC though. I'll test drive some more, but really happy that years of sync weirdness may have come to an end!!
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Posted By: PaulTech
Date Posted: July/07/2015 at 12:35pm
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If that setup doesn't work, I suspect some piece of hardware is malfunctioning. Good luck ------------- Paul Erlandson Lynx Studio Technology Support 714-545-4700 x 206 http://www.facebook.com/lynxsupport" rel="nofollow - Lynx Support and Updates on Facebook! |
Posted By: Sonicsix
Date Posted: September/04/2015 at 5:02pm
| Ok so after things haves settled around here, I can report back. I am getting errors still after I change sample rate. It seems that when I check "allow sample rate change" in the mixer settings, It doesn't stay selected after a reboot. Could this possibly be a clue? |
Posted By: Sonicsix
Date Posted: September/06/2015 at 1:24pm
| Ok, I have just seen that there are updates available. When I get some down time, I will install Core audio 58 and AES16e build 14. I will see if these will work and if I can get this to cooperate! |
Posted By: PaulTech
Date Posted: September/08/2015 at 5:18pm
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There was a change to driver build 58 that may be pertinent here, do give it a try. Make sure and update your firmware as well... ------------- Paul Erlandson Lynx Studio Technology Support 714-545-4700 x 206 http://www.facebook.com/lynxsupport" rel="nofollow - Lynx Support and Updates on Facebook! |
Posted By: Sonicsix
Date Posted: September/18/2015 at 1:48pm
| Updated Firmware and Core Audio to build 58 and The "allow time sync change" stays selected now. I'm assuming "Disable cpu power management" is supposed to be selected? I am still getting errors and digital ring modulated noise after changing sample rate......ugh. Is there any other ways to trouble shoot this? |
Posted By: PaulTech
Date Posted: September/18/2015 at 4:52pm
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Instead of using the aggregate, what if you just use one card. Same behavior? Does it help to increase the buffer size? You have the AES16e #1 on Internal, #2 on Header and the converters syncing to their digital inputs? ------------- Paul Erlandson Lynx Studio Technology Support 714-545-4700 x 206 http://www.facebook.com/lynxsupport" rel="nofollow - Lynx Support and Updates on Facebook! |
Posted By: Sonicsix
Date Posted: September/19/2015 at 4:39pm
I've tried switching to just 1 card/ Aurora and it still has ring modulation sound, sometimes on Aurora 1 and sometimes on #2. It seems to be worse now with the updated firmware and Audi driver. I have it sync'd with pcie #1 on internal, and pcie #2 on header within the Lynx mixer. I've tried the auroura's set to #1 internal, or aes sync source and Autora #2 set to aes sync. |
Posted By: Sonicsix
Date Posted: September/24/2015 at 12:05pm
| I've even tried it in PT11,....still does it. It is worse now that I've updated firmware and Audio drivers. This is maddening. Nothing like tracking a band and playback is distorted and ring modulated while you are charging them. Does anyone know how to test generated clock sync to tell where this issue is coming from?! I'm about to start pricing alternative working equipment before I get blacklisted in the local recording community |
Posted By: PaulTech
Date Posted: September/24/2015 at 4:18pm
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There is something seriously off here. Might I suggest we expedite the solution by getting me remote access to your computer. I should be able to get to the bottom of this pretty quick that way. Call during our business hours or email a good time and I'll get you the log in information. support@lynxstudio.com Phone # in sig ------------- Paul Erlandson Lynx Studio Technology Support 714-545-4700 x 206 http://www.facebook.com/lynxsupport" rel="nofollow - Lynx Support and Updates on Facebook! |
Posted By: Sonicsix
Date Posted: September/24/2015 at 6:37pm
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OK thanks. I will make sure it is acting up and call or email asap. Thanks Paul |
Posted By: Sonicsix
Date Posted: September/26/2015 at 10:34am
| Thanks for the help Paul. Today I opened up the same session, again with distortion happening. First thing that I noticed, is that the "Allow clock change if active" option was unchecked on both AES16e cards in the lynx mixer. Why is this not saving? Maybe since we reset the mixer last night? Anyway, I reselected them and quit Pro Tools. I deleted the PT Aggregate and re launched PT. It seems to have cleaned things up now. I have a short vocal tracking session and I will see how it responds. |
Posted By: Sonicsix
Date Posted: October/30/2015 at 10:10am
| A little update on distortion/ ring modulated sync dropouts....I am still getting them. Works fine sometimes and drops out at others. I'm at a loss here. |
Posted By: David A Hoatson
Date Posted: October/30/2015 at 10:20am
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Paul is at the AES show until Monday. Please let me know what firmware you are currently using. ------------- Thank you, David A. Hoatson Lynx Studio Technology, Inc. Co-founder, Chief Software Engineer |
Posted By: Sonicsix
Date Posted: November/02/2015 at 3:11pm
| Hi David. AES 16e's are both at firmware 14, both auroras are at firmware 28. Lynx mixer 1.0 build 58, driver version 1 build 58. OS X 10.9.5 |
Posted By: David A Hoatson
Date Posted: November/02/2015 at 4:53pm
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I would recommend dropping back to firmware 13.2 on both of the AES16e's and see if that helps. ------------- Thank you, David A. Hoatson Lynx Studio Technology, Inc. Co-founder, Chief Software Engineer |
Posted By: Sonicsix
Date Posted: November/03/2015 at 9:48am
| Ok David, I down graded firmware to 13.2 on bothe aes16e's I have sessions all day today so we will see how it reacts. Thanks. |
Posted By: Sonicsix
Date Posted: November/12/2015 at 3:51pm
| OK, so reporting back, After down grading to firmware 13.2 on the AES!6e's, it seems to have changed some things. It now is giving me the random cpu error, but without any ring modulated distortion accompanying it. Is it possible that the first firmware 14 upgrade was an incomplete install? Should I try to upgrade to it again? |
Posted By: David A Hoatson
Date Posted: November/12/2015 at 3:56pm
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There is no way to do an 'incomplete install' of firmware. It either is done successfully, or it fails and the card won't boot. Seems like it would be best to just call Paul @ 714-545-4700 x 206 and have him go over a few things to make sure everything is setup correctly. ------------- Thank you, David A. Hoatson Lynx Studio Technology, Inc. Co-founder, Chief Software Engineer |
Posted By: Sonicsix
Date Posted: November/19/2015 at 11:55am
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Thanks David, I had Paul do a team viewer to double check my setup a few months ago, and it seemed everything was setup correctly. I have recently noticed that when I change sample rates and weirdness was happening, My syncroclock light is flashing on my second Aurora ( like it is trying to sync again) but it isn't showing being unlocked in the Lynx mixer on AES16e card to that Aurora. Could this be a clue?
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Posted By: Sonicsix
Date Posted: November/19/2015 at 2:22pm
| I also got ring modulation distortion after switching sample rates on firmware 13.2. It does seem more stable when not switching sample rates. Once I get it to sync it seems to stay a little better than on firmware 14. However v14 didn't give me the cpu error alert. |
Posted By: Mike N
Date Posted: November/20/2015 at 11:01am
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Hi, I was looking at your clocking setup: 2 x Lynx aes16e cards (set to receive sync from Digital 8) 1 x Aurora 16, 1 x Aurora8 (set to receive sync via external bnc cables) 1 x UA 2192 connected via digital 8 on AES 16e ( sync set to internal and sending sync via bnc to Auroras) I am assuming that the UA2192 is connected to Port B of one of the AES16e cards (with Aurora 8 on Port A)? What is the Sync Source of the other AES16e set to? ------------- Michael Nicoletti Lynx Studio Technology Sales & Support Coordinator 714-545-4700 Ext. 211 |
Posted By: Sonicsix
Date Posted: November/22/2015 at 5:02pm
Honestly I can't remember completely as I have been trying multiple clock master settings to no avail. I had the UA2192 connected to the AES xlr connectors that showed up on channels 31 ( digital channel 8 on the 2nd AES cable) I have since added a header sync cable, and have been trying to lose the idea of having the master clock be the 2192 now, to just get a stable setup. Now I am using AES16e 1 as master, AES 16e 2 set to Header, Bothe Lynx's set to AES A, and 2192 set to bnc/ word clock from the clock cable headed to the AES16e 1 card. Any suggestions would be welcomed. Thanks
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Posted By: Mike N
Date Posted: November/23/2015 at 1:46pm
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That looks like a good setup....How are the results? ------------- Michael Nicoletti Lynx Studio Technology Sales & Support Coordinator 714-545-4700 Ext. 211 |
Posted By: Sonicsix
Date Posted: November/24/2015 at 9:44am
| Well, it sometimes works when NOT changing sample rates on different sessions. With firmware 13.2 I am back getting buffer under run errors. If I change sample rates I get distortion / ring modulation on audio. I then have to quit pro tools and open Lynx mixer, switch sync on second Aes 16e, from header to digital, and back to header. This seems to send second Aurora into searching and relocking syncrolock. This sometimes works and I can continue. Still not ideal. |
Posted By: Sonicsix
Date Posted: November/24/2015 at 9:53am
| While I was reading the Aurora manual I noticed that the Aes sync "grabs sync from first available sync source from digital connection". I did have my UA 2192 in the last (digital 8 aes) position, and an Eventide Orville before it. Maybe this was causing some chaos. I still have these units connected via aes, however I'm pretty sure I've tried it with both of them disconnected also. |
Posted By: PaulTech
Date Posted: November/24/2015 at 3:00pm
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Very odd. And you have "Drift" turned off for both devices in the aggregate device in Audio MIDI Setup? When the sample rate change induced ring modulation thing happens, could you go to the Console for OSX (under Utilities). Look at the system log and do a search for: >>. This will bring up messages from the Lynx driver. The entries are time stamped. Copy and paste the ones from around the time of the problem and email them to me at support@lynxstudio.com. Thanks ------------- Paul Erlandson Lynx Studio Technology Support 714-545-4700 x 206 http://www.facebook.com/lynxsupport" rel="nofollow - Lynx Support and Updates on Facebook! |
Posted By: Sonicsix
Date Posted: November/30/2015 at 11:54am
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Thanks Paul, Yes Drift is unchecked. I emailed an error code just now. I wasn't getting ring modulation distortion, but was getting error codes about playback buffer. |