SD2 – MacBook Pro – Reaper Latency issue

[Matthew Kudirka]

I just purchased a 2014 13″ MacBook Pro with 2.6 ghz, 16 gb RAM.
running thru a Roland TD15 as the interface usb to Macbook.

Loaded SD2.4 and all my SDX pacs. Loaded Reaper. All works the way it should for the most part. I start off getting excellent Latency. Reaper shows me getting 3.0 ms latency. Excellent and totally un noticable.

If I practice for an extended amount of time. Seems to be about 30 minutes, all of a sudden, I’ll get a glitch, and then the latency is very noticable. Reaper still shows 3.0ms, but it’s not. it feels like 50.0ms. If I shut down Reaper and restart it, it’s fine. Even if I made changes and save the changes. It starts right up and Latency is excellent again. Then 30 minutes(give or take), the glitch happens again and I need to shut it down.

I just swtiched to the MacBook from an old Windows 7 machine(recently upgraded to windows 10) and I never had this issue. and I would have SD2/Reaper open for hours upon hours. I always had 3.7ms latecny and the glitch never happened. not even once.

I thought it might be Reaper, but it happens with Toontrack Solo as well.

any ideas where to start. I’d like to keep the latency as low as possible.

Topic

[John]

Hi,

if it’s not host dependent, I’d start with checking with Roland and the driver. I see that the latest system is 1.14 and the latest driver is 1.0.1 for Mac OS X.
Which exact OS version are you on?

John Rammelt - Toontrack
Technical Advisor

[Matthew Kudirka]

OS is El Capitan. fully updated.
My TD15 is updated to 1.14 and driver is 1.0.1.

I dont understand all the buffering and Block settings. I’ve set my Block size to 128. that gives me 3.0 ms latency. I had it set to 64 and that gave me 1.7ms latency. I thought that may be the problem but it didn’t help. I may move it back to 64.

[John]

Block Size?
Are those separate Buffer and Block Size settings for your driver?
What is the Latency Buffer set to in Toontrack solo under ‘Options’

John Rammelt - Toontrack
Technical Advisor

[Matthew Kudirka]

it seams that in Reaper for my Mac it’s called Block Size. which I now have set to 128.(this may have fixed it) not sure as I was away the past weekend. So I haven’t sat with it much I hope to get some time in this week.

in TT Solo it’s still called Buffer and I have it set to 64.

I really don’t use Solo, I prefer to use Reaper so I can just start recording when I want to.

[John]

Ok,

you get back if you keep having problems.

John Rammelt - Toontrack
Technical Advisor

[Author]

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