Linux-audio-user November 2005

linux-audio-user@lists.linuxaudio.org

147 participants
156 discussions

[linux-audio-user] SysEx dumps - warning newbie alert :)

by Bungee

Hi all, my first posting here! Can anyone suggest a program for doing the 'all voice & multi' dumps on my Yamaha SY35 and TG33. I tried sysexxer (0.7) but though it seems to handle individual voices ok, it bombs on the bigger dumps. There doesn't seem to be amy development happening on it either :( -- Bungee

19 years

[linux-audio-user] software that can rip indices?

by doublehelixer＠yahoo.com

Hello all, I'm having trouble finding an audio utility for linux which can rip individual files using indices on the CD's not just tracks. I have a large library of audio CD's I need to rip, and they all use indices as they all have more than 99 tracks. Can anybody recommend a tool that can handle these? Thanks in advance, - Andy __________________________________ Yahoo! Mail - PC Magazine Editors' Choice 2005 http://mail.yahoo.com

19 years

[linux-audio-user] [ANN] rt_watchdog

by Florian Schmidt

Hi, here http://affenbande.org/~tapas/rt_watchdog.tgz you find a small program which acts as a watchdog daemon that kills runaway SCHED_FIFO tasks. It does so by setting up two threads: - one high priority (99) consumer that runs every 3 seconds - one low priority (1) producer that runs every second the producer fills a ringbuffer and the consumer drains it. When the ringbuffer runs empty a shell script will be run (via the system() function) that tries to change the scheduling policy of all threads in the system from SCHED_FIFO to SCHED_OTHER. the offending task may naturally not run at prio 99, otherwise the watchdog would never get to run. Here's a potential problem: The shell script potentially changes its own scheduling policy to SCHED_OTHER prior to chnaging the offending runaway task. Ugh! Any hint? Also all IRQ handler threads also have their policy changed. Dunno whether that's good or not. For reference i pasted the script and the c file here: unfifo_stuff.sh (the two arguments are the two thread id's of the rt_watchdog threads, as these are not supposed to have their policy changed). There's also a small test program in the tarball (compiles to test_rt) that wastes cycles SCHED_FIFO (locking the system) but exits eventually, so it's quite safe to test the watchdog with it. Maybe someone else find's it useful. Recommendations, tips, critique are all welcome.. unfifo_stuff.sh #!/bin/bash for i in $( ps -eL -o pid ); do if [ "$i" != "$1" -a "$i" != "$2" ] then chrt -o -p 0 $i fi done rt_watchdog.c: #include <pthread.h> #include <stdlib.h> #include <stdio.h> #include <unistd.h> #include <syslog.h> #include <signal.h> #include <sys/mman.h> #include <sys/stat.h> #include <sys/types.h> #include <linux/unistd.h> #include <errno.h> _syscall0(pid_t,gettid) #include "ringbuffer.h" /* how long to sleep between checks in the high prio thread */ #define SLEEPSECS 3 /* how long to sleep between writing "alive" messages to the ringbuffer from the low prio thread */ #define LP_SLEEPSECS 1 /* the priority of the high prio thread */ #define PRIO 99 /* the priority of the low prio thread */ #define LP_PRIO 1 /* the ringbuffer used to transfer "alive" messages from low prio producer to high prio consumer */ jack_ringbuffer_t *rb; pthread_t low_prio_thread; /* the thread id's for the low prio and high prio threads. these get passed to the unfifo_stuff.sh script to make sure the watchdog doesn't repolicy itself to SCHED_OTHER */ pid_t lp_tid; pid_t hp_tid; void signalled(int signal) { } volatile int thread_finish; /* this is the low prio thread. it simply writes to the ringbuffer to signal that it got to run, meaning it is still alive */ void *lp_thread_func(void *arg) { char data; struct timespec tv; lp_tid = gettid(); /* syslog(LOG_INFO, "lp tid: %i", gettid()); */ data = 0 ; while(!thread_finish) { /* we simply write stuff to the ringbuffer and go back to sleeping we can ignore the return value, cause, when it's full, it's ok the data doesn;t have any meaning. it just needs to be there running full shouldn't happen anyways */ jack_ringbuffer_write(rb, &data, sizeof(data)); /* then sleep a bit. but less than the watchdog high prio thread */ tv.tv_sec = LP_SLEEPSECS; tv.tv_nsec = 0; // sleep(LP_SLEEPSECS); nanosleep(&tv, NULL); } return 0; } int main() { pid_t pid, sid; int done; struct sched_param params; char data; int err; int consumed; int count; struct timespec tv; char unfifo_cmd[1000]; /* Fork off the parent process */ pid = fork(); if (pid < 0) { exit(EXIT_FAILURE); } /* If we got a good PID, then we can exit the parent process. */ if (pid > 0) { exit(EXIT_SUCCESS); } /* Change the file mode mask */ umask(0); /* Open any logs here */ openlog("rt_watchdog", 0, LOG_DAEMON); syslog(LOG_INFO, "started"); /* Create a new SID for the child process */ sid = setsid(); if (sid < 0) { /* Log any failure here */ syslog(LOG_INFO, "setsid failed. exiting"); exit(EXIT_FAILURE); } /* Change the current working directory */ if ((chdir("/")) < 0) { /* Log any failure here */ syslog(LOG_INFO, "chdir failed. exiting"); exit(EXIT_FAILURE); } /* Close out the standard file descriptors */ close(STDIN_FILENO); close(STDOUT_FILENO); close(STDERR_FILENO); // syslog(LOG_INFO, "closed fd's"); /* syslog(LOG_INFO, "hp tid: %i", gettid()); */ hp_tid = gettid(); /* not really nessecary, but wtf */ mlockall(MCL_FUTURE); thread_finish = 0; done = 0; /* get ourself SCHED_FIFO with prio PRIO */ params.sched_priority = PRIO; if (pthread_setschedparam(pthread_self(), SCHED_FIFO, &params)) { syslog(LOG_INFO, "couldn't set realtime prio for main thread.. exiting.."); exit(EXIT_FAILURE); } // syslog(LOG_INFO, "prio set"); /* create a ringbuffer for the low prio thread to signal it's alive */ rb = jack_ringbuffer_create(1024); // syslog(LOG_INFO, "ringbuffer created"); /* create low prio thread */ err = pthread_create(&low_prio_thread, 0, lp_thread_func, 0); if(err) { syslog(LOG_INFO, "couldn't create low prio thread, exiting.."); exit(EXIT_FAILURE); } /* dirty. we really need to wait for the lp thread to have written the lp_tid. (condition variable?) */ sleep(1); // syslog(LOG_INFO, "created low prio thread"); /* make the low prio thread sched_fifo */ params.sched_priority = LP_PRIO; if (pthread_setschedparam(low_prio_thread, SCHED_FIFO, &params)) { syslog(LOG_INFO, "couldn't set realtime prio for lower prio thread.. exiting.."); thread_finish = 1; pthread_join(low_prio_thread, NULL); exit(EXIT_FAILURE); } /* this is the main loop. we somply check whether the low prio thread got to run at all by looking into the ringbuffer. If it's empty, the low prio thread is kinda dead */ count = 0; while(!done) { tv.tv_sec = SLEEPSECS; tv.tv_nsec = 0; nanosleep(&tv, NULL); /* sleep(SLEEPSECS); */ count++; /* syslog(LOG_INFO, "count %i", count); */ /* see if our little brother got to run */ if (jack_ringbuffer_read_space(rb) == 0) { /* oh oh, it didn't */ syslog(LOG_INFO, "low prio thread seems to be starved, taking measures..."); /* we pass our own TID's to the script, so we are excluded from the scheduling policy change */ sprintf(unfifo_cmd, "unfifo_stuff.sh %i %i", lp_tid, hp_tid); syslog(LOG_INFO, "unfifo command:"); syslog(LOG_INFO, unfifo_cmd); if (system(unfifo_cmd) == -1) { syslog(LOG_INFO, "unfifo command failed"); } } else { /* consume stuff from ringbuffer */ consumed = 0; while (jack_ringbuffer_read_space(rb)) { consumed++; jack_ringbuffer_read(rb, &data, 1); } /* syslog(LOG_INFO, "lp alive: %i", consumed); */ } } thread_finish = 1; pthread_join(low_prio_thread, NULL); syslog(LOG_INFO, "exiting"); exit(EXIT_SUCCESS); } test.c: #include <pthread.h> #include <stdlib.h> #include <sys/time.h> #include <time.h> int main() { struct sched_param params; int done = 0; struct timeval tv; time_t startsec; unsigned long int loops; int outer_loops; params.sched_priority = 80; pthread_setschedparam(pthread_self(), SCHED_FIFO, &params); gettimeofday(&tv,0); startsec = tv.tv_sec; #if 0 while(!done) { gettimeofday(&tv, 0); if(tv.tv_sec - startsec > 10) done = 1; } #endif for (outer_loops = 0; outer_loops < 4; ++outer_loops) { for (loops = 0; loops < 1000000000; loops++) {done += 1;} } exit (EXIT_SUCCESS); } -- Palimm Palimm! http://tapas.affenbande.org

19 years

[linux-audio-user] Re: Ardour mixer plugins

by Ben Loftis

Marcel, Your description makes it sound like you are running the reverb first, then distortion. That may be part of the problem. You probably want the distortion before the EQ. In Ardour the mixer plugins are connected in series, with the items at the top of the list coming "before" the lower items. I'd make a chain like this: eq->compressor->distortion->eq->reverb and then start experimenting with the settings of each. Tweaking the eq's before and after the compressor and distortion will give you lots of tones. For example, you could boost the low end with the first eq and then reduce it with the second EQ. You'll want to try several different distortions to see how they react with the EQ. -Ben > 2. Can anyone of you suggest a good rock guitar plugin setting? I'm > currently using "freeverb"+"foldover distortion" - the result is okay, > but somehow not enough. > > Thanks in advance > - Marcel Karras

19 years

[linux-audio-user] [ANN] Denemo 0.7.4 Released

by Adam Tee

Denemo is a GTK+ front end for GNU Lilypond Music Typesetter. http://denemo.sourceforge.net After a long period of time denemo 0.7.4 has been released. New features include : Help Documentation Support for exporting to Lilypond 2.6 All ornaments/articulations added Replace Mode Basic Redo/Undo Functionality for individual objects More Templates available Export to PDF (via lilypond processing) Courtesy of Jens Askengren Also, this mail serves as a call for additional contributors to the project as Lilypond is fast moving rapid development is required to keep up. A plug-in API is being developed to enable export to other file formats or automated composition tools. Any contribution will be greatly received. Adam

19 years

[linux-audio-user] [rzewnickie@rfa.org: [linux-audio-dev] digigram mixart cards in smp machine]

by Eric Dantan Rzewnicki

Sorry to any who get this twice. I meant to send to lau, not lad. ----- Forwarded message from Eric Dantan Rzewnicki <rzewnickie(a)rfa.org> ----- Date: Thu, 3 Nov 2005 15:47:37 -0500 From: Eric Dantan Rzewnicki <rzewnickie(a)rfa.org> Subject: [linux-audio-dev] digigram mixart cards in smp machine To: linux-audio-dev(a)music.columbia.edu I'm trying to get a digigram mixart8 aes/ebu working in a dual xeon box. A RME digi96 card works fine in the same box and the digigram works fine in a different uni-processor box. I don't know if it's smp related or just the box or what. booting with nosmp does not help. The symptom is that aplay fails with EINVAL when trying to open /dev/snd/pcmC0D0p (or any other device on the card). jackd fails similarly when trying to open the corresponding capture device. Elrond:~# aplay /var/snd/999999_000.wav aplay: main:533: audio open error: Invalid argument The firmware is loaded. aplay works on the same box with the RME card. This is debian sarge with 2.6.13 (also tried 2.6.14) and alsa 1.0.9. Anyone have any thoughts? ----- End forwarded message ----- -- Eric Dantan Rzewnicki | Systems Administrator Technical Operations Division | Radio Free Asia 2025 M Street, NW | Washington, DC 20036 | 202-530-4900 CONFIDENTIAL COMMUNICATION This e-mail message is intended only for the use of the addressee and may contain information that is privileged and confidential. Any unauthorized dissemination, distribution, or copying is strictly prohibited. If you receive this transmission in error, please contact network(a)rfa.org.

19 years

[linux-audio-user] Cheesetracker patch

by james＠dis-dot-dat.net

I've written a simple patch to add info on the real-time capabilities of LADSPA plugins in CheeseTracker. I know I seem to be the only CheeseTracker user on the lists, but just in case... http://blog.dis-dot-dat.net/2005/10/cheesetracker-patch.html -- "I'd crawl over an acre of 'Visual This++' and 'Integrated Development That' to get to gcc, Emacs, and gdb. Thank you." (By Vance Petree, Virginia Power)

19 years

[linux-audio-user] song info needed

by Dave Phillips

Greetings: Who wrote & recorded the song Burningbai that's on the LAM list ? Is the song in Chinese ? I really like that song, would also like to know what they're saying. :) Best, dp

19 years

Re: [linux-audio-user] AudioTrak Maya 44 USB

by Sampo Savolainen

Quoting Lukas Zapletal <lukas.zapletal(a)linuxexpres.cz>: > Dne Wed, 02 Nov 2005 13:34:13 -0500 > Paul Davis <paul(a)linuxaudiosystems.com> napsal(a): > > > aplay -N -D plughw:1 /home/lzap/.openoffice/user/gallery/type.wav > > > > i suspect you have another process using your audio interface, and > that > > both alsaplayer and aplay are waiting for it to be released. the -N > > argument to aplay tells it not to wait but to report an error. > > Well it hangs. I will send the outputs. Seems you are not giving up, me > neither! Thanks for your help... > > ps - no audio process is running Just to be sure, let's verify that you have no audio processes running. Tell us what this command outputs: lsof /dev/snd/* Sampo Savolainen

19 years

[linux-audio-user] AudioTrak Maya 44 USB [LONG]

by Lukas Zapletal

Hello, I am trying to get this card working. It seems Maya does not complain USB standard. The ALSA subsystem detect it, it wake up but the mixers are not configured properly (since this card has 2+2 stereo inputs/outputs). What to do? Do I have chances to get it working? Thanks for help ps - sorry for the long post, see the output of lsusb and the error message - what this does mean? teepee card1 # pwd /proc/asound/card1 teepee card1 # cat stream0 AUDIOTRAK MAYA44 USB at usb-0000:00:1d.1-2, full speed : USB Audio Playback: Status: Stop Interface 1 Altset 1 Format: S16_LE Channels: 4 Endpoint: 1 OUT (ADAPTIVE) Rates: 44100, 48000 Capture: Status: Stop Interface 2 Altset 1 Format: S16_LE Channels: 4 Endpoint: 2 IN (SYNC) Rates: 44100, 48000 alsaplayer -o alsa -d default=hw:1,0 test.mp3 ALSA lib pcm.c:2090:(snd_pcm_open_noupdate) Unknown PCM default=hw:1,0 snd_pcm_open: file not found (default=hw:1,0) Failed to initialize plugin! teepee card1 # amixer -c1 Simple mixer control 'Speaker',0 Capabilities: pvolume pswitch pswitch-joined Playback channels: Front Left - Front Right Limits: Playback 0 - 255 Front Left: Playback 207 [81%] [off] Front Right: Playback 207 [81%] [off] Simple mixer control 'Speaker',1 Capabilities: pvolume pswitch pswitch-joined Playback channels: Front Left - Front Right Limits: Playback 0 - 255 Front Left: Playback 211 [83%] [off] Front Right: Playback 211 [83%] [off] Simple mixer control 'Speaker',2 Capabilities: pvolume pswitch pswitch-joined Playback channels: Front Left - Front Right Limits: Playback 0 - 255 Front Left: Playback 230 [90%] [on] Front Right: Playback 230 [90%] [on] teepee card1 # amixer -c1 controls numid=1,iface=MIXER,name='Speaker Playback Switch' numid=3,iface=MIXER,name='Speaker Playback Switch',index=1 numid=5,iface=MIXER,name='Speaker Playback Switch',index=2 numid=2,iface=MIXER,name='Speaker Playback Volume' numid=4,iface=MIXER,name='Speaker Playback Volume',index=1 numid=6,iface=MIXER,name='Speaker Playback Volume',index=2 teepee card1 # amixer -c1 contents numid=1,iface=MIXER,name='Speaker Playback Switch' ; type=BOOLEAN,access=rw---,values=1 : values=off numid=3,iface=MIXER,name='Speaker Playback Switch',index=1 ; type=BOOLEAN,access=rw---,values=1 : values=off numid=5,iface=MIXER,name='Speaker Playback Switch',index=2 ; type=BOOLEAN,access=rw---,values=1 : values=on numid=2,iface=MIXER,name='Speaker Playback Volume' ; type=INTEGER,access=rw---,values=2,min=0,max=255,step=0 : values=207,207 numid=4,iface=MIXER,name='Speaker Playback Volume',index=1 ; type=INTEGER,access=rw---,values=2,min=0,max=255,step=0 : values=211,211 numid=6,iface=MIXER,name='Speaker Playback Volume',index=2 ; type=INTEGER,access=rw---,values=2,min=0,max=255,step=0 Bus 002 Device 004: ID 0a92:0091 EGO SYStems, Inc. Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 1.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 8 idVendor 0x0a92 EGO SYStems, Inc. idProduct 0x0091 bcdDevice 1.00 iManufacturer 1 AUDIOTRAK iProduct 2 MAYA44 USB iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 295 bNumInterfaces 4 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x00 MaxPower 250mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 1 Audio bInterfaceSubClass 1 Control Device bInterfaceProtocol 0 iInterface 0 AudioControl Interface Descriptor: bLength 10 bDescriptorType 36 bDescriptorSubtype 1 (HEADER) bcdADC 1.00 wTotalLength 142 bInCollection 2 baInterfaceNr( 0) 1 baInterfaceNr( 1) 2 AudioControl Interface Descriptor: bLength 12 bDescriptorType 36 bDescriptorSubtype 2 (INPUT_TERMINAL) bTerminalID 5 wTerminalType 0x0101 USB Streaming bAssocTerminal 0 bNrChannels 2 wChannelConfig 0x0003 Left Front (L) Right Front (R) iChannelNames 0 iTerminal 0 AudioControl Interface Descriptor: bLength 12 bDescriptorType 36 bDescriptorSubtype 2 (INPUT_TERMINAL) bTerminalID 3 wTerminalType 0x0603 Line Connector bAssocTerminal 0 bNrChannels 2 wChannelConfig 0x0003 Left Front (L) Right Front (R) iChannelNames 0 iTerminal 0 AudioControl Interface Descriptor: bLength 10 bDescriptorType 36 bDescriptorSubtype 6 (FEATURE_UNIT) bUnitID 4 bSourceID 3 bControlSize 1 bmaControls( 0) 0x01 Mute bmaControls( 0) 0x02 Volume bmaControls( 0) 0x02 Volume iFeature 0 AudioControl Interface Descriptor: bLength 12 bDescriptorType 36 bDescriptorSubtype 2 (INPUT_TERMINAL) bTerminalID 1 wTerminalType 0x0603 Line Connector bAssocTerminal 9 bNrChannels 2 wChannelConfig 0x0003 Left Front (L) Right Front (R) iChannelNames 0 iTerminal 0 AudioControl Interface Descriptor: bLength 10 bDescriptorType 36 bDescriptorSubtype 6 (FEATURE_UNIT) bUnitID 2 bSourceID 1 bControlSize 1 bmaControls( 0) 0x01 Mute bmaControls( 0) 0x02 Volume bmaControls( 0) 0x02 Volume iFeature 0 AudioControl Interface Descriptor: bLength 15 bDescriptorType 36 bDescriptorSubtype 4 (MIXER_UNIT) bUnitID 6 bNrInPins 3 baSourceID( 0) 5 baSourceID( 1) 4 baSourceID( 2) 2 bNrChannels 2 wChannelConfig 0x0003 Left Front (L) Right Front (R) iChannelNames 0 bmControls 0x00 iMixer 0 junk at descriptor end: 00 AudioControl Interface Descriptor: bLength 10 bDescriptorType 36 bDescriptorSubtype 6 (FEATURE_UNIT) bUnitID 7 bSourceID 6 bControlSize 1 bmaControls( 0) 0x01 Mute bmaControls( 0) 0x02 Volume bmaControls( 0) 0x02 Volume iFeature 0 AudioControl Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 3 (OUTPUT_TERMINAL) bTerminalID 8 wTerminalType 0x0301 Speaker bAssocTerminal 0 bSourceID 7 iTerminal 0 AudioControl Interface Descriptor: bLength 12 bDescriptorType 36 bDescriptorSubtype 2 (INPUT_TERMINAL) bTerminalID 9 wTerminalType 0x0603 Line Connector bAssocTerminal 1 bNrChannels 2 wChannelConfig 0x0003 Left Front (L) Right Front (R) iChannelNames 0 iTerminal 0 AudioControl Interface Descriptor: bLength 10 bDescriptorType 36 bDescriptorSubtype 6 (FEATURE_UNIT) bUnitID 10 bSourceID 9 bControlSize 1 bmaControls( 0) 0x01 Mute bmaControls( 0) 0x02 Volume bmaControls( 0) 0x02 Volume iFeature 0 AudioControl Interface Descriptor: bLength 11 bDescriptorType 36 bDescriptorSubtype 4 (MIXER_UNIT) cannot get string descriptor 9, error = Broken pipe(32) << HERE Warning: Descriptor too short bUnitID 11 bNrInPins 1 baSourceID( 0) 10 bNrChannels 2 wChannelConfig 0x0003 Left Front (L) Right Front (R) iChannelNames 0 bmControls 0x00 iMixer 9 AudioControl Interface Descriptor: bLength 9 bDescriptorType 36 bDescriptorSubtype 3 (OUTPUT_TERMINAL) bTerminalID 12 wTerminalType 0x0101 USB Streaming bAssocTerminal 0 bSourceID 11 iTerminal 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 1 Audio bInterfaceSubClass 2 Streaming bInterfaceProtocol 0 iInterface 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 1 bNumEndpoints 1 bInterfaceClass 1 Audio bInterfaceSubClass 2 Streaming bInterfaceProtocol 0 iInterface 0 AudioControl Interface Descriptor: bLength 7 bDescriptorType 36 bDescriptorSubtype 1 (AS_GENERAL) bTerminalLink 5 bDelay 1 frames wFormatTag 1 PCM AudioControl Interface Descriptor: bLength 14 bDescriptorType 36 bDescriptorSubtype 2 (FORMAT_TYPE) bFormatType 1 (FORMAT_TYPE_I) bNrChannels 4 bSubframeSize 2 bBitResolution 16 bSamFreqType 2 Discrete tSamFreq[ 0] 44100 tSamFreq[ 1] 48000 Endpoint Descriptor: bLength 9 bDescriptorType 5 bEndpointAddress 0x01 EP 1 OUT bmAttributes 9 Transfer Type Isochronous Synch Type Adaptive wMaxPacketSize 384 bInterval 1 bRefresh 0 bSynchAddress 0 AudioControl Endpoint Descriptor: bLength 7 bDescriptorType 37 bDescriptorSubtype 1 (EP_GENERAL) bmAttributes 0x01 Sampling Frequency bLockDelayUnits 0 Undefined wLockDelay 0 Undefined Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 2 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 1 Audio bInterfaceSubClass 2 Streaming bInterfaceProtocol 0 iInterface 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 2 bAlternateSetting 1 bNumEndpoints 1 bInterfaceClass 1 Audio bInterfaceSubClass 2 Streaming bInterfaceProtocol 0 iInterface 0 AudioControl Interface Descriptor: bLength 7 bDescriptorType 36 bDescriptorSubtype 1 (AS_GENERAL) bTerminalLink 12 bDelay 1 frames wFormatTag 1 PCM AudioControl Interface Descriptor: bLength 14 bDescriptorType 36 bDescriptorSubtype 2 (FORMAT_TYPE) bFormatType 1 (FORMAT_TYPE_I) bNrChannels 4 bSubframeSize 2 bBitResolution 16 bSamFreqType 2 Discrete tSamFreq[ 0] 44100 tSamFreq[ 1] 48000 Endpoint Descriptor: bLength 9 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 13 Transfer Type Isochronous Synch Type Synchronous wMaxPacketSize 384 bInterval 1 bRefresh 0 bSynchAddress 0 AudioControl Endpoint Descriptor: bLength 7 bDescriptorType 37 bDescriptorSubtype 1 (EP_GENERAL) bmAttributes 0x01 Sampling Frequency bLockDelayUnits 0 Undefined wLockDelay 0 Undefined Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 3 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 3 Human Interface Devices bInterfaceSubClass 0 No Subclass bInterfaceProtocol 0 None iInterface 0 HID Device Descriptor: bLength 9 bDescriptorType 33 bcdHID 1.00 bCountryCode 0 bNumDescriptors 1 bDescriptorType 34 Report wDescriptorLength 52 cannot get report descriptor Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x83 EP 3 IN bmAttributes 3 Transfer Type Interrupt Synch Type none wMaxPacketSize 8 bInterval 16 Language IDs: (length=4) 0409 English(US) -- S pozdravem / Best regards Lukas Zapletal sefredaktor / Editor-In-Chief LinuxEXPRES - opravdovy linuxovy magazin www.LinuxEXPRES.cz tel.: +420 777 003 843

19 years

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Linux-audio-user November 2005