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efferent 2012-11-15 05:18

latency while recording
i'm using my keyboard as a midi controller at the moment and find it works quite well. The response is good when playing various midi instruments. I've recently started a tune that isn't overloaded with stuff and the dsp looks like the load is fine, but as soon as i hit record my response on the keyboard goes for sh1t and is delayed. its definitely only when recording and is stuffing up workflow.

i'm running a macbook core duo2 with 2.4ghz processor and 4 gigs of ram, projectmix i/o soundcard which should be fine. i've run alot smaller machines in the past and had no probs.

any ideas.

deankay 2012-11-15 08:03

As far as I know there shouldn't be any difference in latency when you hit record vs just playing.
What's your buffer size at? Generally people use a smaller buffer size when recording and on playback you can increase the buffer to take the load off your cpu.

djfm1983 2012-11-17 07:30

Yeah recording and playing shouldn't change any latency numbers.

Rejunky 2012-11-18 10:30


Originally Posted by djphathead (Post 1179684)
Yeah recording and playing shouldn't change any latency numbers.

i have the same problem with my macbook air 11" with only on Instrument in a song file. Playing with the Computerkeys live runs very good until i press the record Button in Reason. I wrote a message to the props....

efferent 2012-11-20 00:59

i figured as much.. shouldn't make a difference. i need to go through a process of elimination to work out if its all instruments and under what circumstances this happens.. pain in the arse.. i just want to get on with making tunes.

Rejunky 2012-11-22 23:59


i have check my tasks in the Backend (German called Aktive Prozesse) - one of my Helper Task in the Background of a Cleaner Software was the Reason for the delay while REASON 6.x Recording :-)

skatebird 2012-11-23 08:20

We have tried reproducing this at the PH office but haven't been able to. Please try Rejunky's tip of checking if there are some other processes that interfere with Reason.

The input from the computer keyboard is handled by the same thread (≈process) that handles the GUI, and not by the thread that handles the audio. The GUI-thread always has lower priority than the audio thread, which means that if the computer is working hard, the GUI (and computer keyboard input) might fall behind a bit. This is a design decision, but it might be the cause of the problems that you are experiencing.

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