rosegarden MIDI app needs RT kernel?
I've been playing around with music software on RPi 4B, rosegarden seems to be working OK for MIDI sequencing, but I noticed it has been displaying a warning about timer resolution and it suggests switching to a RT kernel. I assume they are talking about a kernel built with the rt-preempt option. Is a pre-built RT kernel package available for Buster/Pi4?
Re: rosegarden MIDI app needs RT kernel?
Same question about an RT kernel or other solution to the low resolution timer problem.
I needed a way to make sequences for practicing physical instruments. A simple percussion track and a bass track over which I can play/practice stringed instruments. Rosegarden works, but I see the warning and have wondered the same thing.
I've only started to work with Rosegarden, so I've not had a chance to get something laid down and listen to it for jitter or bad timing. Can someone say how bad it is?
I needed a way to make sequences for practicing physical instruments. A simple percussion track and a bass track over which I can play/practice stringed instruments. Rosegarden works, but I see the warning and have wondered the same thing.
I've only started to work with Rosegarden, so I've not had a chance to get something laid down and listen to it for jitter or bad timing. Can someone say how bad it is?
Re: rosegarden MIDI app needs RT kernel?
I've had a day or two to use Rosegarden running under Raspbian to make practice loops on a Pi4B 8G, ondemand overclock to 2000 MHz, USB HDD root filesystem.
Perhaps I'm not that exacting about precise tempo settings, but I didn't experience anything I would call off or wrong. The beats I hear sound accurately placed, so I'm very happy with Rosegarden running under Raspbian buster with it's standard kernel.
My internet readings claimed a timer frequency of 100 Hz from one source and another claimed 250 Hz. I have no clue which is correct, but the timer's low frequency is said to be the cause of the low resolution.
Perhaps I'm not that exacting about precise tempo settings, but I didn't experience anything I would call off or wrong. The beats I hear sound accurately placed, so I'm very happy with Rosegarden running under Raspbian buster with it's standard kernel.
My internet readings claimed a timer frequency of 100 Hz from one source and another claimed 250 Hz. I have no clue which is correct, but the timer's low frequency is said to be the cause of the low resolution.
Re: rosegarden MIDI app needs RT kernel?
I have started using MusE instead of Rosegarden. No problems detected yet. I built the latest MusE 3.11 from github source. MusE seems a bit more "light weight" and more suitable for my purposes. Running on a 4GB Pi4 with USB SSD, standard clocks.