Linux-audio-dev March 2005

linux-audio-dev@lists.linuxaudio.org

68 participants
63 discussions

Re: [linux-audio-dev] 3D fft analysis program

by Downer

> I'm hoping that you're thinking of a realtime display, in which the > peaks roll off to create a true waterfall effect. Baudline (http://www.baudline.com) is a fantastic viewer that does fft cascade. I've used it for a couple of years, and it is great for figuring out how different sounds "work", and it has an oscilloscope-type display as well. Cheers, Jason Downer

18 years, 4 months

[linux-audio-dev] Drum synth

by Dmitry Baikov

Hello. I finally started making my pet music project and realized I need a drum synth to make some cool sounds. psindustrializer is good but also need some tr-909-style sounds. I remeber from my old windoze days I used a nice piece of software called Stomper. Does anybody know any software for linux with comparable capabilities? Or we need to write one? Stomper does not work under wine :( Thanks.

18 years, 4 months

[linux-audio-dev] Re: Drum synth

by Juhana Sadeharju

Hello. I had a couple of articles on drum synths. Check ftp://ftp.funet.fi/pub/sci/audio/devel/lad/drumsynth/ I built the circuit in a00*.jpg at the time when this article was fresh. The article b00*jpg mentions an earlier article. I will check that out at library. Hmm.. I coded a drum synth for Commodore VIC-20 at the time. VIC provided an audio chip with three oscillators, noise, and a common volume if I remember correctly. What I did was to modulate osc pitch and volume parameters with a fast and accurate (compared to Basic) assembly code. The drum sounds were assigned to the keys. This was about 1984, inspired by Yamaha's digital RX drum synths, not by analog drums. Juhana -- http://music.columbia.edu/mailman/listinfo/linux-graphics-dev for developers of open source graphics software

18 years, 4 months

[linux-audio-dev] Re: lad design patterns

by Juhana Sadeharju

>From: "Levi D. Burton" <ldb(a)puresimplicity.net> > >does the idea of documenting various lad design patterns make >sense to anyone? Such "LAD Gems" doc would be much needed here too. (For audio dsp gems, take a look at "musicdsp.org".) I would appreciate if somebody would take a look at Ardour and document best gems found there. E.g., the GUI and audio thread separation and start up sequences. Likewise for Linuxsampler and one of its GUI frontends. Juhana -- http://music.columbia.edu/mailman/listinfo/linux-graphics-dev for developers of open source graphics software

18 years, 7 months

Re: [linux-audio-dev] impulse convolution LADSPA plugin

by Stefan Turner

Hi Steve, thanks for the reply. I will definitely look into using DSSI, looks like it could be good once as supported as LADSPA is (I'd never even heard of it before your post, although that's probably just me). Is it intended as an eventual LADSPA replacement? I never really saw the need to divide plugins into 'instruments' and 'effects', and it seems like DSSI can do both. Stefan Turner > It would be more practical to do it as a DSSI plugin, LADSPA has no way > to > indicate that you want to load files during runtime, and no UI. > > In DSSI you can load the impulse in the "UI" process, perform the FFT > on > it and send it ot hte DSP code with configure(). Once there the DSP > code > can the overlap-add/save on it. > > - Steve ___________________________________________________________ Win a castle for NYE with your mates and Yahoo! Messenger http://uk.messenger.yahoo.com

19 years, 4 months

[linux-audio-dev] XITEL INPORT

by Charles A. Crayne

I have recently acquired a XITEL INPORT device, to capture music from my stereo system, and although [as shown below] it seems to be supported by the FC3 kernel, I have not yet managed to find any way to access the USB data stream. Any clues on how I should proceed? arecord -l **** List of CAPTURE Hardware Devices **** card 0: Solo1 [ESS ES1938 (Solo-1)], device 0: es-1938-1946 [ESS Solo-1] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: Audio [USB Audio], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 /proc/asound/card1 total 0 -r--r--r-- 1 root root 0 Mar 29 17:00 id -rw-r--r-- 1 root root 0 Mar 29 17:00 oss_mixer dr-xr-xr-x 3 root root 0 Mar 29 17:00 pcm0c dr-xr-xr-x 3 root root 0 Mar 29 17:00 pcm0p -r--r--r-- 1 root root 0 Mar 29 17:00 stream0 -r--r--r-- 1 root root 0 Mar 29 17:00 usbbus -r--r--r-- 1 root root 0 Mar 29 17:00 usbid

19 years, 6 months

[linux-audio-dev] jack and alsa design issue

by Hans Fugal

I'm writing an application that will use alsa in the common case, but be jack-capable. I'm faced with the following design question: Do I wrap the jack part to emulate the read/write of alsa, or do I wrap the alsa part to emulate the callback style of jack? In other words, do I push or pull from the audio segment of the program? As I understand it, alsa can be asynchronous but it requires using SIGIO which doesn't excite me. So I'd have to create another thread that selects and fills a ringbuffer. To adapt jack, I'd have a ringbuffer which is drained when the program pulls the audio. Adapting Jack seems the easier thing to do, but what do you think? -- .O. Hans Fugal | De gustibus non disputandum est. ..O http://hans.fugal.net | Debian, vim, mutt, ruby, text, gpg OOO | WindowMaker, gaim, UTF-8, RISC, JS Bach --------------------------------------------------------------------- GnuPG Fingerprint: 6940 87C5 6610 567F 1E95 CB5E FC98 E8CD E0AA D460

19 years, 6 months

[linux-audio-dev] [PATCH] liblo & pattern matching callback

by Martin Habets

Hi Steve, Was testing this scenario today, which may look familiar to you: - I created a server with some methods: '/ping/documentation' and '/osc-schema/documentation', both of which use the same handler 'doc'. - I send query '/*/documentation' to the server. - 'doc' got called twice with path '/*/documentation'. The unexpanded path makes it impossible for the handler to determine what container was intended. In my interpretation the OSC spec is not completely explicit on this point, but I think the intention was to send the expanded path to the handler. The spec is specific in stating that '*' is invalid in an OSC method, and it talks about the "OSC Address of a OSC Method". Initially I hacked liblo to always send the expanded path. However, the result was also that the generic method handler (oh, I used that too :) got called with a NULL path. Since that is useless to that handler it seems best to me to use the unexpanded path for this case. The resulting patch is applied. Please let me know your view on this. Cheers, -- Martin --------------------------------------------------------------------------- Index: liblo/src/server.c =================================================================== --- liblo.orig/src/server.c 2005-03-02 19:15:47.000000000 +0000 +++ liblo/src/server.c 2005-03-26 11:33:41.000000000 +0000 @@ -463,6 +463,7 @@ lo_address src = lo_address_new(NULL, NULL); char hostname[LO_HOST_SIZE]; char portname[32]; + const char *pptr; free(msg->types); msg->types = types; @@ -542,7 +543,13 @@ } } - ret = it->handler(path, types, argv, argc, msg, + /* Send wildcard path to generic handler, expanded path + to others. + */ + pptr = path; + if (it->path) pptr = it->path; + + ret = it->handler(pptr, types, argv, argc, msg, it->user_data); } else if (lo_can_coerce_spec(types, it->typespec)) { @@ -572,7 +579,13 @@ } endian_fixed = 1; - ret = it->handler(path, it->typespec, argv, argc, msg, + /* Send wildcard path to generic handler, expanded path + to others. + */ + pptr = path; + if (it->path) pptr = it->path; + + ret = it->handler(pptr, it->typespec, argv, argc, msg, it->user_data); free(argv); free(data_co);

19 years, 6 months

[linux-audio-dev] [OT] Linux soundapps site updated

by Dave Phillips

Greetings: If you don't know the drill: http://linux-sound.org (USA) http://linuxsound.atnet.at (Europe) http://linuxsound.jp (Japan) As usual the Japanese site will update later this evening. Please note that my old Bright.net addresses and pages are gone now. If you have a page containing a link to the old Bright.net site for these pages please update it to one of the new URLs. Note too that my email address is also no longer at Bright.net, please update your address book as necessary. Best, dp

19 years, 6 months

[linux-audio-dev] More music

by james＠dis-dot-dat.net

http://www.dis-dot-dat.net/music/jolly_192.mp3 Used: Cheesetracker, jack-rack and timemachine. Style: Downbeaty-kind-of-thing -- "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, 6 months

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

Linux-audio-dev March 2005