February 2008 - Alsa-devel - mailman.alsa-project.org

[alsa-devel] [ASoc] TDM over one SSC channel on AT91 possible?
by Friedrich Lobenstock 24 Jun '11

24 Jun '11

Hello! The background: I'm just designing an ATMEL AT91RM9200 based board which got two TLV320AIC33 on board. It is either possible to hook up the two TLV320AIC33 to a separate SSC (synchronous serial control) channel each or use one SSC channel and configure it for TDM (time division multiplex) mode. There is already a driver for TLV320AIC14k/TLV320AIC2k in the development tree, so adding support for the TLV320AIC33 should be feasible. What I'm not sure about is the fact if ASOC is prepared for using channels, especially SSC, in TDM mode. Is the core ASOC structure prepared to handle that? Would we be better off instantiate one drive twice each time with different parameters for the SSC channel? Thanks for any feedback. -- MfG / Regards Friedrich Lobenstock _________________________________________________________ SCOTTY Group Austria GmbH a SCOTTY Group plc company, http://www.scottygroup.com/ _________________________________________________________

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[alsa-devel] [PATCH] improved snd-aloop quality when using certain samplerates and kernel HZ
by Ahmet İnan 02 Jun '08

02 Jun '08

after using a HZ:=300 kernel for some time now and needing snd-aloop again i found out, that i either had to correct the hardcoded number, or fix the problem permanently, which couses stuttering and other problems. i also removed the SYNC on start code, not just because its more or less useless and brings problems, but ive got a nice idea how to fix this overrun/underrun problem in a much nicer way. so stay tuned for the next patch, until its implemented. this patch here is more or less experimental, id like to hear some feedback. http://www.mathematik.uni-freiburg.de/IAM/homepages/ainan/alsa-driver-1.0.1… Signed-off-by: Ahmet İnan <ainan <at> mathematik.uni-freiburg.de> please also include my email address when responding - i have no intention to enable recieving emails from the list. ahmet -- admin der abteilung für angewandte mathematik, tel. 0761-203-5626

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[alsa-devel] [RFC] virtual master control for HD-audio
by Takashi Iwai 06 May '08

06 May '08

Hi, another thing I'd like to push into the next kernel is the virtual master volume control. As I posted in earlier posts, it adds virtual controls that have several slave controls with the same types, e.g. Front, Surround, Center, LFE, etc. Then these are adjusted simultaneously via the master control. It'd be appreciated if some one can test the patches with HD-audio h/w that has no master control yet (e.g. some STAC codecs). Note that this won't add the master volumes if there are no real volume controls. Some codecs have really no volume control, and this won't help for such devices. Two (and one for driver) patches will follow after this. Takashi

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[alsa-devel] Altec Lansing FX5051 mixer
by Jeremy Nickurak 04 Apr '08

04 Apr '08

I recently purchased an Altec Lansing USB Surround speaker set. (It's a set of 5.1 speakers, with a built-in USB sound card). I've got about a week before the return policy expires and I'd have to return it. The mixer doesn't work at all w/linux kernel 2.6.22, everything is locked at 100% volume, which is pretty unhelpful, as it's the only way to adjust the volume. (no analog controls). Also, the digital control panel locks up when the speakers power up, further preventing any access to the volume controls. The device works out-of-the-box without any drivers under XP, so I have to so-far assume that alsa's usb-audio is missing something. Any thoughts as to what could be wrong? I'm more than happy to prod the device and submit any information I can extract about it, or even potentially opening the device up for remote access if a reputable developer is interested in examining it. -- Jeremy Nickurak -= Email/Jabber: atrus(a)rifetech.com =-

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[alsa-devel] ALSA driver for Native Instruments sound hardware
by Daniel Mack 23 Mar '08

23 Mar '08

Hi, some months after the last posting, we finally managed to finish a new version of the ALSA driver for Native Instruments' external USB sound cards such as "Rig Kontrol 2", "Kore Kontroller", "Audio Kontrol 1" and "Audio 8 DJ". Compared to the last release, the following things were changed: - the streaming logic was completely reworked so that multiple substreams are handled correctly - a Linux input device layer was added to support the knobs, buttons and pedals on "Rig Kontrol 2" and "AudioKontrol 1" - workqueues were entirely removed from the code - most data structures are now allocated within one big struct to avoid multiple, smaller allocations - many more cleanups according to Clemens' reply on my last posting[1] The driver was properly tested with all the mentioned hardware on both record and playback channels. The patchset should apply to the current mecurial alsa-kernel tree. Please let me know what you think. Best regards, Daniel [1] http://article.gmane.org/gmane.linux.alsa.devel/34324/ Signed-off-by: Daniel Mack <daniel(a)caiaq.org> Signed-off-by: Karsten Wiese <fzu(a)wemgehoertderstaat.de>

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[alsa-devel] HW decoding abstracted in ALSA
by Harsha priya gupta 19 Mar '08

19 Mar '08

Hi, I am new to ALSA and audio stack in Linux. I have a sound card that can do HW decoding as well. I am looking at writing an ALSA driver such that whatever may be the player or MMF above, it should use the HW decoder and not the inherit SW decoder that is available with the player. Can someone help me with some pointers or existing like-drivers? Thanks in advance, Harsha

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[alsa-devel] no front speaker sound with ALC262
by Rene Dohmen 17 Mar '08

17 Mar '08

Dear List, I have a problem with an Intel HDA soundcard lspci output: ----- 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01) The sound volume is very very low when i use the headphone output. The device has integrated speakers but i don't hear any sound coming out of them (maybe because the volume is so low...). I've put all the mixer channels to the maximum values. When booted in Win XP the soundcard works correctly. Is see one line in my logs that indicate that something is wrong: hda_codec: Unknown model for ALC262, trying auto-probe from BIOS... I didn't have it working with other versions of ALSA. Tested with 1.0.14(provided with ubunty gutsy), then started reading, lots of suggestions stated that the problem would be solved in 1.0.15, so i compiled 1.0.16 from src and replaced the default alsa modules with the new ones. De device i 'm using is supplied by tangent ( http://www.tangent.com/t_all_in_one_LCDPC/vita_8000s.htm) its an all in one solution with touchscreen and speakers integrated in one small cabinet. I runned the alsa-info.sh script output and uploaded it: http://pastebin.ca/913865 I don't know if this is the correct place for getting help but all help is appreciated, Best Regards, Rene Dohmen

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[alsa-devel] Maya44 driver in the official ALSA tree
by Piotr Zaryk 15 Mar '08

15 Mar '08

Hi, When will be the next alsa-driver version released? Can't wait till maya44 support will be added to the official alsa tree. It will help with the development of the new driver. -- Piotr Zaryk

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Re: [alsa-devel] no front speaker sound with ALC262
by Takashi Iwai 14 Mar '08

14 Mar '08

At Fri, 29 Feb 2008 17:24:03 +0100, Rene Dohmen wrote: > > No I still don't know where the speakers are conencted. > I asked the support engineers at tangent to send me a detailed > blockdiagram of their sound solution and ik think i'll receive that > sooner or later. > > So, for now, I just tried passing the EAPD option to all NIDS in the > codec#0 file. > > I attached the code#0 file while working with very low volume > > When I run > sudo hda-verb/hda-verb /dev/snd/hwC0D0 0x03 SET_EAPD 0x02 > or > sudo hda-verb/hda-verb /dev/snd/hwC0D0 0x02 SET_EAPD 0x02 Doh, I actually misunderstood that your codec were ALC268 but it's ALC262. EAPD command can be issued only on widgets that support. ALC262 has no EAPD pin caps at all. so it doesn't work like that. Instead, ALC262 (and other Realtek codecs) has a special sequence with coefficients to the vendor-defined widget. Yes, it's a black magic. Try the following sequence: 0x20 SET_COEF_INDEX 0x07 0x20 SET_PROC_COEF 0x3060 0x3060 can be different numbers like 0x3070 or 0x3050. If you set a different number, reset the coef index again (i.e. always call as a pair). Takashi

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[alsa-devel] snd-hda-intel: Fix volume-wheel and microphone on Fujitsu-Siemens Amilo M3438G
by M G 10 Mar '08

10 Mar '08

Currently the default model that gets selected on this hardware is "F1734". Using this model neither the volume-wheel nor microphone (internal or external) work. The first part of my patch changes the default model to "fujitsu", this enables the volume wheel on the left side of the laptop. The second part changes the capture settings and thus makes it possible to record from microphones. Now when capturing from the external microphone I can hear myself talking but its quite quiet. I can improve this a little by raising the capture volume, but if I raise it above 40 I can no longer record anything. Questions: Is this patch any good or is there a better way to fix my problems? Why is the recording so quiet and why can't I record with capture value above 40? Patch: diff -r c4c5e6ced12f pci/hda/patch_realtek.c --- a/pci/hda/patch_realtek.c Wed Feb 06 15:48:06 2008 +0100 +++ b/pci/hda/patch_realtek.c Wed Feb 06 15:59:28 2008 +0100 @@ -2917,7 +2917,7 @@ static struct snd_pci_quirk alc880_cfg_t SND_PCI_QUIRK(0x161f, 0x203d, "W810", ALC880_W810), SND_PCI_QUIRK(0x1695, 0x400d, "EPoX", ALC880_5ST_DIG), SND_PCI_QUIRK(0x1695, 0x4012, "EPox EP-5LDA", ALC880_5ST_DIG), - SND_PCI_QUIRK(0x1734, 0x107c, "FSC F1734", ALC880_F1734), + SND_PCI_QUIRK(0x1734, 0x107c, "FSC F1734", ALC880_FUJITSU), SND_PCI_QUIRK(0x1734, 0x10ac, "FSC", ALC880_UNIWILL), SND_PCI_QUIRK(0x1734, 0x10b0, "Fujitsu", ALC880_FUJITSU), SND_PCI_QUIRK(0x1854, 0x0018, "LG LW20", ALC880_LG_LW), @@ -3161,7 +3161,7 @@ static struct alc_config_preset alc880_p .dig_out_nid = ALC880_DIGOUT_NID, .num_channel_mode = ARRAY_SIZE(alc880_2_jack_modes), .channel_mode = alc880_2_jack_modes, - .input_mux = &alc880_capture_source, + .input_mux = &alc880_6stack_capture_source, .unsol_event = alc880_uniwill_p53_unsol_event, .init_hook = alc880_uniwill_p53_hp_automute, },

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