[LAU] : Cracking sounds

Mysth-R mysthr21 at gmail.com
Tue Oct 7 07:51:48 EDT 2008
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This is incredible !!

well, after some days googling, compiling kernel and tweaking my laptop
(set_rlimit, setpci latency_timer, rtirq, etc...) I got the same results.
But testing again and again I found that I got crackling sounds with my
firewire sound card (using freebob or ffado), and also with my usb sound
card. Tests were :

frame/period : 256  ; Period/buffer : 3 ==> bad !
Frame/period : 512 ; Period/buffer : 3  ==> bad !
Frame/period : 1024 ; Period/buffer : 3 ==> ok but with an unacceptable
latency : 64 ms...

finally I thought that it was a pd issue, and in some kind of aspect it was.
(due to too much midi messages at the same time).
But when I tried my patch with :
frame/period : 64 ; Period/buffer : 3 ==> it was ok !!!

So strange ?! Why does it works with a latency of 4ms or 64ms and does not
work for other settings ?
Well I am happy because I used to play live... so a 4ms latency is really
good for me. But I would like to understand ?!

Cheers,
Mysth-R


2008/9/27 Mysth-R <mysthr21 at gmail.com>

>
>
> 2008/9/25 Pieter Palmers <pieterp at joow.be>
>
> Mysth-R wrote:
>>
>>>
>>>
>>> 2008/9/24 Pieter Palmers <pieterp at joow.be <mailto:pieterp at joow.be>>
>>>
>>>    Mysth-R wrote:
>>>
>>>
>>>
>>>        2008/9/23 Pieter Palmers <pieterp at joow.be
>>>        <mailto:pieterp at joow.be> <mailto: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 ?
>>>
>>
>> You seem to be running a Ricoh 1394 chipset, that can be a problem. I
>> think you're experiencing a hardware issue.
>>
>
> Yes I got a ricoh but I had too much issues with it. Now I use an
> ExpressCard with firewire extension, and it has a Texas Instrument chip (see
> the two last line of the lspci result).
> Perhpas due to a rate transfer of the Express Card ....
>
>
>>
>> Also, for me the pd patch crackles without doing anything, but then again
>> I don't know how to use pd properly.
>>
>
> You can try to run pd with :
>
> $ pd -rt -jack -alsamidi
>
>
>
>
>>
>>
>> Greets,
>>
>> Pieter
>>
>>
>>
>>> 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 <http://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.
>>> *
>>> ***************************************************************************************
>>>
>>
>>
>
>
> --
> *
> ***************************************************************************************
> *  {^_^} 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.
> *
> ***************************************************************************************
>



-- 
*
***************************************************************************************
*  {^_^} 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.
*
***************************************************************************************
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