Linux-audio-dev October 2013

linux-audio-dev@lists.linuxaudio.org

36 participants
30 discussions

list all ALSA-devices (including virtual ones)

by IOhannes m zmoelnig

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 hi all, what's the proper way to list all alsa-devices, including those (plugin, slave,...) defined in asoundrc? e.g. on my desktop i have $ cat ~/.asoundrc pcm.jack { type jack playback_ports { 0 1 } capture_ports { 0 1 } } $ cat /proc/asound/cards 0 [MID ]: HDA-Intel - HDA Intel MID HDA Intel MID at 0xf4ff8000 irq 42 1 [Bt878 ]: Bt87x - Brooktree Bt878 Brooktree Bt878 at 0xf3fff000, irq 17 but aplay will show me: <snip> $ LANG=C aplay -L -l null Discard all samples (playback) or generate zero samples (capture) pulse PulseAudio Sound Server sysdefault:CARD=MID HDA Intel MID, VT1828S Analog Default Audio Device front:CARD=MID,DEV=0 HDA Intel MID, VT1828S Analog Front speakers surround40:CARD=MID,DEV=0 HDA Intel MID, VT1828S Analog 4.0 Surround output to Front and Rear speakers surround41:CARD=MID,DEV=0 HDA Intel MID, VT1828S Analog 4.1 Surround output to Front, Rear and Subwoofer speakers surround50:CARD=MID,DEV=0 HDA Intel MID, VT1828S Analog 5.0 Surround output to Front, Center and Rear speakers surround51:CARD=MID,DEV=0 HDA Intel MID, VT1828S Analog 5.1 Surround output to Front, Center, Rear and Subwoofer speakers surround71:CARD=MID,DEV=0 HDA Intel MID, VT1828S Analog 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers hdmi:CARD=MID,DEV=0 HDA Intel MID, VT1828S Digital HDMI Audio Output **** List of PLAYBACK Hardware Devices **** card 0: MID [HDA Intel MID], device 0: VT1828S Analog [VT1828S Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: MID [HDA Intel MID], device 2: VT1828S Alt Analog [VT1828S Alt Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: MID [HDA Intel MID], device 3: VT1828S Digital [VT1828S Digital] Subdevices: 1/1 Subdevice #0: subdevice #0 </snip> there is no mention of my 'jack' pcm, *and* there are devices that i don't know where they come from: namely 'null' and 'pulse' (pulseaudio is installed but not running, as confirmed by <snip> $ pgrep pulse $ </snip> so i figure that the extra devices come from system-configuration files in /usr/share/alsa/alsa.conf(.d/*.conf) but why does my "jack" PCM not show up? i know that i can extend my asoundrc to: <snip> pcm.jack { type jack playback_ports { 0 1 } capture_ports { 0 1 } hint { description "use jack as alsa-device" } } </snip> but i don't fully understand why i have to manually add the "hint" (of which i haven't found *any* documentation) in order to make the device show up with char**hints=NULL; snd_device_name_hint(-1, "pcm", (void***)&hints); any clues? fgasmdr IOhannes -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.15 (GNU/Linux) Comment: Using GnuPG with Icedove - http://www.enigmail.net/ iQIcBAEBCAAGBQJSbpcIAAoJELZQGcR/ejb4MdUP/jatXtJ+8OMWVCpWjREoVUqD j73W6ghI16MNHKhOI2DalmZEQM5P3XocBCR0zoG6mzbzIV5TwkvH/tRwjNbvvkoS suinC/7XFB0p0MpaMfzsMmU34ZlvynCalyWL1DBuApxxaFbTeIxHKTQ3/fF5ztpG iM0fyXVKBw7Y0PX4iubl8CeUwmwgvoZ3oV4SqwkgOk8r+cPB/lrkGFl6vrOQxUV0 lQeHdlzPWDSU/QPfuT8OUpN6A4HIjrEMQ2PMQNAOhSBE3N4WJnGxz3La6TeHU3Xu ybKTn70pslyO+bDluwvqygpaMoBRnSfdXW7+JxLfq/0j1ND2FVIRl0RL2aZADPp6 kcq92L+9py5sF48lEVIEFvbTLXEL7uUH1fxPBkbqw2Rde8CY+aPQqDgQvbnDZMTu oN7JEjySB9meJw7RBnAdMQokC6meJDdWJ/pxZuBapvx6+T0m3PaiUZbO5scPSFVt w3j/fA3NipZwZVENJhuiyWO+H1DUbq8lXHYPSSP5YjgyIkzDu36KQigRfSCuZdrb mq/aDXVmC0+j5EWF9lkDYSDwPFj5GqcsuehX86mAS1LLTyL8/IeyjYTVwbN8FjuJ Sb8g+PNFWJDIAo9OrgOEvzYkQ+qbCAf5TBVWKCWe5HdCBlChpXd8yDMKb52dtB7L GCF4kejxZn75aooUxru5 =1pxG -----END PGP SIGNATURE-----

11 years, 2 months

raspberry pi audio in

by Robert Jonsson

Hi guys, As those interested know the raspberry pi lacks an audio input. Now, I came across this some days ago: http://www.noiseisgood.co.nz/?p=365 Apparently it is possible to wire an i2c adc/dac to the raspberry pi and utilize some already available alsa driver. Just thought I would share and ask if anyone has tried anything similar? Regards, Robert

11 years, 2 months

Looking for library to categorise audio

by Philipp Überbacher

Hi there, I'm looking for a library that I could use to categorise audio. Relatively simple categories would be sufficient, for example silence, music, speech, noise. It would be preferable if I could use it from a general purpose language over a specialised one (rather java or C than pd). Do you know or even have experience with such a library? Thanks in advance, Philipp

11 years, 3 months

Gain in dB

by André Garnier Coutinho

Hey guys, Which definition do you use when you want to do a gain control in dB? GdB = 20log(Out/In) ?

11 years, 3 months

LV2 Oscilloscope

by Aurélien Leblond

>> problem is get_supplied_options() returns 0 options when called from the UI. >> > get_supplied_options() should work fine both in UIs and Plugins. My guess > is the host only gives the sampleRate option to the Plugin and not the UI. > Which host are you working with? I'm using Ingen - I sent a ticket to David Robillard onto http://dev.drobilla.net/timeline and will wait for his advise. In the meant time I'll try and debug Ingen itself and see if I can create a patch. > Also, you can compile the UI with a -DLVTK_DEBUG=1, and the console will > print the validation status for any features passed in by the host. > > You could also from the UI send a patch get message and make sure the > Plugin knows how to respond appropriately. Thanks for the ideas - I'll give those a try. Aurélien

11 years, 3 months

Re: [LAD] html5 audio filters

by Patrick Shirkey

On Mon, October 14, 2013 4:08 am, Markus Seeber wrote: > Hi, > i'm not sure, but you could have a look at what he is doing: > > http://mohayonao.github.io/timbre.js/reverb.html > > That is quite a large JavaScript framework, but maybe the right place to > start? > Looks interesting but it doesn't have support for ogg afaict. However I might be able to do something with the examples. Anyone else have any other suggestions? > > Am 10/13/2013 06:58 PM, schrieb Patrick Shirkey: >> Hi, >> >> Can anyone point me to an example for echo/delay/reverb filters using >> html5 audio? >> >> -- Patrick Shirkey Boost Hardware Ltd

11 years, 3 months

Call for testing: ALSA driver for Fireworks/BeBoB based devices

by Takashi Sakamoto

Hi all, This is a call for testing my ALSA driver for Fireworks/BeBoB based devices. Please test 'snd-fireworks' for Fireworks and 'snd-bebob' for BeBoB if you have some devices listed in the end of this mail. Status: - still under development - Without snd-dice and Clemens' development (I must do this later) Functionality: - playback/capturing (full duplex) with PCM/MIDI interface - hardware metering for some devices with CONTROL interface - switching clock source/digital interface/digital mode with CONTROL interface - print hardware status with PROC interface Note: - Don't use simultaneously 'ALSA PCM/MIDI playback/capture' and 'jackd with Firewire (FFADO) backend'. Both of them try connecting to the device when another is running. - I add much modification into snd-firewire-lib for full duplex synchronization of receive/transmit AMDTP stream. Requirement: - Linux kernel 3.11 or later because of Juju (nickname of Firewire stack) changing its API. - Dynamic Kernel Module Support (DKMS) is reccomended for safely installing/uninstalling (I work with Ubuntu 13.10) Bug report: - report with /proc/asound/cardX/#XXX - please send your experiences to me with the output How to install (DKMS): 1. $ git clone https://github.com/takaswie/snd-firewire-improve.git 2. $ ln -s $(pwd)/snd-firewire-improve/ /usr/src/alsa-firewire-3.11 (superuser) 3. $ dkms install snd-firewire/3.11 (superuser) How to uninstall (DKMS): 1. $ modprobe -r snd-bebob snd-fireworks snd-firewire-lib (superuser) 2. $ dkms remove ans-firewire/3.11 --all (superuser) 3. $ rm /usr/src/alsa-firewire-3.11 (superuser) 4. $ rm snd-firewire-improve How to install (Manual): 1. $ git clone https://github.com/takaswie/snd-firewire-improve.git 2. $ cd snd-firewire-improve 3. $ make 4, backup system snd-firewire-lib/snd-firewire-speakers/snd-isight (superuser) 5. install snd-firewire-lib/snd-firewire-speakers/snd-isight/snd-fireworks/snd-bebob (superuser) 6. depmod -a (superuser) How to uninstall (Manual) 1. modprobe -r snd-firewire-lib snd-firewire-speakers snd-isight snd-fireworks snd-bebob (superuser) 2. remove snd-firewire-lib/snd-firewire-speakers/snd-isight/snd-fireworks/snd-bebob (superuser) 3. recover snd-firewire-lib/snd-firewire-speakers/snd-isight (superuser) 4. depmod -a (superuser) Confirmed to work: - AudioFire4 - AudioFirePre8 - Ozonic - Firewire Solo - Firewire Audiophile - Firewire 410 == Fireworks based devices [Echo Audio] AudioFire2 AudioFire4 AudioFirePre8 AudioFire8 (till 2009) AudioFire8 (since 2009) AudioFire12 [Gibson] RIP [Mackie] Onyx 400F Onyx 1200F == BeBoB based devices [Yamaha] GO44 GO46 [M-Audio] (to control mixer channels please use FFADO upstream) Ozonic Firewire 410 Firewire Audiophile Firewire Solo NRV10 ProFireLightbridge [Focusrite] SaffirePro 26 I/O SaffirePro 10 I/O Saffire(LE) [Edirol] FA-66 FA-101 [TerraTecElectronic GmbH] Phase88FW PhaseX24FW [PreSonus] FireBox FirePod [Mackie] OnyxFirewire [Tascam] IF-FW/DM [Behringer] X32 [ApogeeElectronics] Rosetta200 [ESI] Quatafire610 Regards Takashi Sakamoto o-takashi(a)sakamocchi.jp

11 years, 3 months

LV2 Oscilloscope

by Aurélien Leblond

> I would just bypass the LV2 host altogether and use shared memory to get > the audio data to the GUI. > ...and use the same mechanism to send the sample rate. That's through Instance-Access right? That's exactly what I want to avoid - this plugin is meant to be used in Ingen and Ingen doesn't support this. > LV2 UIs can get the sample-rate using the options extension. > Hosts will set the appropriate option lv2param:sampleRate which the UI > can get on initialization. I tried that but without success. I'm using the LVTK library to develop this plugin. My approach is to: - use the get_supplied_options() method to access the host supplied options - iterate until I find SampleRate problem is get_supplied_options() returns 0 options when called from the UI. Any advice? Aurélien

11 years, 3 months

html5 audio filters

by Patrick Shirkey

Hi, Can anyone point me to an example for echo/delay/reverb filters using html5 audio? -- Patrick Shirkey Boost Hardware Ltd

11 years, 3 months

Some proposals for fluidsynth and qsynth

by Zlobin Nikita

Hello community. First, have to note, that i'm not sure, what fluidsynth backend is best today, as first time i got it, was several years ago when i tried ubuntustudio (even simpler - just installed pro-media software to Ubuntu 7.04) and when ubuntu 10.04 released and even 12.04, i still suppose using of qsynth, since i don't now others with such full amount of settings. Now proposals. 1 - optional feature (i.e. with switch to disable it) to publish fluidsynth engines as dbus or other kind of services, exactly like what jack already has. If such option is enabled by default, then even when engine is loaded via linked library, as done in MuseScore, it still may be controlled by external gui like QSynth. Also, another example of such way is linuxsampler way (limited, because qsampler only allowes to change backend addess in settings, but hope it is to be fixed). 2 - only about gui at all, not only qsynth: i read one time somewhere, that fluidsynth supports microtonality (scale tuning), but only few months ago could try it in action, controlling manually standalone fluidsynth, started in terminal. It would be great to add in qsynth panel like in zyn/yoshimi for scale tuning. Also interested, is there some gui, where scale tuning is implemented (hard even to hope when even most featureful gui doesn't have it).

11 years, 3 months

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Linux-audio-dev October 2013