[LAU] : Cracking sounds
Mysth-R
mysthr21 at gmail.com
Thu Sep 25 00:14:03 EDT 2008
2008/9/24 Pieter Palmers <pieterp at joow.be>
> Mysth-R wrote:
>
>>
>>
>> 2008/9/23 Pieter Palmers <pieterp at joow.be <mailto:pieterp at joow.be>>
>>
>> Mysth-R wrote:
>>
>> Hi,
>>
>> I've got a strange behaviour with my midi controller and/or
>> freebob/ffado.
>> I made a pure data patch, with a midi learn function. So I can
>> control everything with my midi controller.
>> When I use jack with Freebob or ffado (I tested both) and a
>> Presonus Firebox, I got cracking sounds every time I move
>> faders, pots from my Midi Controler.
>> When I use jack with alsa and a poor usb berhinger UCA202 it
>> works perfectly : no cracking sounds
>>
>>
>> Is your midi controller attached to the Presonus box or is it a USB
>> midi controller?
>>
>>
>> I tried with USB and directly attached to the Presonus. My controller is a
>> Korg microKontrol, but I tried with another controller too (an EMU I think)
>> I also tried with Jackd and Jackdmp , cause I am on Gentoo 64bits.
>>
>
> Strange...
>
>
>>
>> What settings do you use for jackd?
>>
>>
>> My settings are :
>>
>> /usr/bin/jackd -R -dfirewire -r48000 -p256 -n3
>>
>> does it happen with higher buffer sizes too?
>
> try increasing the priority of jackd to 65:
> /usr/bin/jackd -R -P65 -dfirewire -r48000 -p256 -n3
>
> I suspect that it has something to do with the kernel layer since it's
> present in both freebob and ffado.
>
Ok I have made some tests
First test :
priority : 65
frame/period : 4096
Test OK !! :)
Second test :
Priority : 65
Frame/period : 512
It cracks !
Last test :
Priority : 65
Frame / period : 1024
Test OK !!
A friend of mine just tell me that my pd patch works find with his config,
and freebob : no cracks !
What, in your mind, could be the problem ? software ? hardware ?
on my gentoo I have compiled my own kernel (2.6.25.4-rt5). But on the open
suse I took the one from Jacklab (2.6.22.13)
#################################################
Some more infos :
1- lspci
2- cat /proc/interrupts
3- rtirq
4- limit.conf
###############################################"
1- lspci :
mysthr2 at localhost ~ $ sudo lspci
00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and
945GT Express Memory Controller Hub (rev 03)
00:01.0 PCI bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and
945GT Express PCI Express Root Port (rev 03)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition
Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port
1 (rev 01)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port
2 (rev 01)
00:1c.3 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port
4 (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI
Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI
Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI
Controller #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI
Controller #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI
Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge
(rev 01)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA IDE
Controller (rev 01)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev
01)
01:00.0 VGA compatible controller: nVidia Corporation GeForce Go 7900 GS
(rev a1)
03:00.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev
02)
03:01.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller
03:01.1 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host
Adapter (rev 19)
03:01.2 System peripheral: Ricoh Co Ltd Device 0843 (rev 01)
03:01.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter
(rev 0a)
03:01.4 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 05)
0c:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network
Connection (rev 02)
0d:00.0 PCI bridge: Texas Instruments XIO2000(A)/XIO2200(A) PCI
Express-to-PCI Bridge (rev 03)
0e:00.0 FireWire (IEEE 1394): Texas Instruments XIO2200(A) IEEE-1394a-2000
Controller (PHY/Link) (rev 01)
mysthr2 at localhost ~ $
#########################################################
2- cat /proc/interrupts
CPU0 CPU1
0: 1558526 0 IO-APIC-edge timer
1: 1313 0 IO-APIC-edge i8042
8: 1 0 IO-APIC-edge rtc
9: 2 0 IO-APIC-fasteoi acpi
12: 123 0 IO-APIC-edge i8042
14: 11715 0 IO-APIC-edge ata_piix
15: 97 0 IO-APIC-edge ata_piix
16: 48553 0 IO-APIC-fasteoi nvidia
17: 1495 0 IO-APIC-fasteoi eth0
19: 83 0 IO-APIC-fasteoi ohci1394, ohci1394
20: 6296 0 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb2
21: 106 0 IO-APIC-fasteoi uhci_hcd:usb3, HDA Intel
22: 92 0 IO-APIC-fasteoi uhci_hcd:usb4
23: 0 0 IO-APIC-fasteoi uhci_hcd:usb5
NMI: 0 0 Non-maskable interrupts
LOC: 39497 1450011 Local timer interrupts
RES: 35829 46345 Rescheduling interrupts
CAL: 38 43 function call interrupts
TLB: 259 469 TLB shootdowns
TRM: 0 0 Thermal event interrupts
THR: 0 0 Threshold APIC interrupts
SPU: 0 0 Spurious interrupts
ERR: 0
##################################################
3- rtirq :
#!/bin/sh
#
# Copyright (c) 2004-2007 rncbc aka Rui Nuno Capela.
#
# /etc/conf.d/rtirq
#
# Configuration for IRQ thread tunning,
# for realtime-preempt enabled kernels.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 or later.
#
# IRQ thread service names
# (space separated list, from higher to lower priority).
RTIRQ_NAME_LIST="rtc ohci1394 i8042"
# Highest priority.
RTIRQ_PRIO_HIGH=99
# Priority decrease step.
RTIRQ_PRIO_DECR=10
# Whether to reset all IRQ threads to SCHED_OTHER.
RTIRQ_RESET_ALL=0
# On kernel configurations that support it,
# which services should be NOT threaded
# (space separated list).
RTIRQ_NON_THREADED="rtc ohci1394"
# Process names which will be forced to the
# highest realtime priority range (99-91)
# (space separated list, from highest to lower priority).
# RTIRQ_HIGH_LIST="softirq-timer"
#############################################################"
4- limits.conf
@audio - rtprio 99
@audio - nice -10
@audio - memlock 1774000
###########################################################
That's all !! :)
Cheers,
Mysth-R
--
*
***************************************************************************************
* {^_^} Mysth-R {^_^}
* <= Aide Auditive =>
*
* http://myspace.com/mysthr
* http://myspace.com/aideauditive
* http://mysthr.free.fr/Joomla => Site dédié à l'audio sous
Fedora/PlanetCCRMA.
*
***************************************************************************************
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.linuxaudio.org/pipermail/linux-audio-user/attachments/20080925/a303c0e5/attachment.htm
More information about the Linux-audio-user
mailing list