Thank you coders
now I can use Linux to make music
Regarding to 'nobody does report success, just bugs are reported' I guess NO MIDI JITTER is worth a crossposting.
$ uname -a
Linux edubuntu 126.96.36.199-rt31 #1 SMP PREEMPT RT Tue Apr 26 15:05:31 CEST 2011 i686 GNU/Linux
jackd 1.9.8 I guess svn 4290 or earlier
Qtractor 0.4.8.69 svn 1978
jackd --sync -Xalsarawmidi -dalsa -r48000 -p256
snd-hrtimer loaded and used as ALSA seq timer source, unfortunately there aren't enough timers to be used with JACK clients, when using the "-c" switch.
With Ardour (synced to Qtractor by JACK transport) I recorded
- Yoshimi, JACK MIDI
- Hydrogen (as sample player only, not using it's pattern sequencer)and
DSSI plugins hosted by Qtractor, ALSA MIDI
- via PCI Envy24 MPU an Oberheim Matrix-1000, Yamaha DX7, Yamaha TG33
connected by a MIDI thru chain
I didn't record all instruments at the same time, but one after the other and sync is perfect, no audible jitter.
Unfortunately I couldn't use -Xalsarawmidi for recording MIDI events on MIDI tracks, because there's no bridge.
FWIW, Ardours latency compensation is ok too. Ardour just isn't restoring the SMPTE offset, which isn't a big deal, because I don't use it now and manually setting it does work.
My machine is a
$ hwinfo --cpu
Model: 15.107.2 "AMD Athlon(tm) X2 Dual Core Processor BE-2350"
Clock: 2100 MHz
$ hwinfo --memory
Memory Size: 4 GB
When building the kernel I set
'echo "CONFIG_HIGHMEM4G is not set" >> .config' and
'echo "CONFIG_HIGHMEM64G=y" >> .config' and btw.
'echo "CONFIG_MK8=y" >> .config' too.
The distro is Edubuntu 10.10 Maverick 32-bit + Ubuntu Studio meta packages. Using the FLOSS nv driver for a NVIDIA GeForce 7200 GS on an ASUS M2A-VM HDMI motherboard. The two PCI sound cards are not used as one virtual sound card. Both are active, but I only did use one of the cards. I didn't use any USB device, but e.g. a PS/2 mouse and keyboard. PPPoE and screen saver were enabled, CPU frequency scaling was set to performance.
Still one issue left. Any recommendations for a sound card with good audio qualitiy
? I guess I could spend around 700,- EUR and I need minimal 2 or better 4 analog IOs, mic pre amps etc. aren't needed, I'm using a mixing console.
At the moment I 've got two TerraTec EWX 24/96 PCI cards, which cause a muddy bass sound.
Thank you very much for the good work again,
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