Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

7516 discussions

[linux-audio-dev] Libs for reading/writing midis

by Will Woodruff

There have got to be some decent libraries for this, but it seems like almost every linux midi app has its own code for reading and writing midi files. What's up with that? What do you guys recommend?

20 years, 3 months

[linux-audio-dev] The Emacs saga continues: Music editing and programming

by Mario Lang

Hi. IIRC, I already told of my plans to write a midi.el for Emacs Lisp to handle MIDI file data in Emacs directly on LAD. This idea has been recently supersceeded by something much more powerful, the marriage of CommonMusic and Emacs. SLIME is the key, SLIME makes it possible! I've been recently learning CommonMusic again, and discovered that it already can nicely handle MIDI file data (and much more). So reimplementing the wheel in yet another lisp dialect doesn't seem like a very useful exercise. What I can do, actually, is bring Emacs and CM a little more together, using SLIME. This effectively means that now, I can control SC and CM from Emacs, very easily. Its all a bit of puzzlework for now, but as soon as we/I worked out some ways to make things stick more together, I think this is going to be a very powerful combination. ;; Example Emacs Lisp code: (require 'slime) (defun cm-eval (form &optional callback) "Eval FORM in the CM package. If CALLBACK is a function, pass result to it as soon as evaluation is finished (async). Otherwise, return result." (setq form `(swank:interactive-eval ,(format "%S" form))) (if callback (slime-eval-async form `(lambda (arg) (funcall ,callback (read arg))) "CM") (read (slime-eval form "CM"))))) (defun cm-get-midi-notes (filename) "Return all notes in a midi file in sequencial order." ;; Not very useful in real world, just a demonstration (cm-eval `(note (nreverse (fold-objects 'cons (events (import-events ,(expand-file-name filename)) (new seq)) () :slot 'keynum :class 'midi)))))) ;(cm-get-midi-notes "~/music/Bach_Suite_no4_BWV1006a_Prelude.mid") => ; (E2 E5 EF5 E5 B4 AF4 B4 E4 FS4 E4 EF4 E4 ...) ;(length (cm-get-midi-notes "~/music/Bach_Suite_no4_BWV1006a_Prelude.mid")) => ; 1741 >From here on, it should be fairly trivial to integrate SC and CM since both can be easily talked to from within Emacs programmatically. One thing I'd like to attempt for instance is a tree-widget based browser for CM objects. Thoughts? More code? If you are interested in this, send private mail. -- CYa, Mario

20 years, 3 months

[linux-audio-dev] jack 0.100.0 announcement

by Taybin Rutkin

Jack has finally reached version 0.100.0. In brief, more functions for getting latency statistics, better thread handling, and a more verbose way of connecting to the jackd server. This new function is jack_client_open(). From the documentation: Open an external client session with a JACK server. This interface is more complex but more powerful than jack_client_new(). With it, clients may choose which of several servers to connect, and control whether and how to start the server automatically, if it was not already running. There is also an option for JACK to generate a unique client name, when necessary. Jack-0.100.0 is available from http://jackit.sf.net, although a new website is in the works. ***CHANGES*** Rewritten coreaudio driver Switched to ALSA-1.0 API Added functions jack_client_create_thread(), jack_get_max_delayed_usecs(), jack_reset_max_delayed_usecs(), jack_internal_client_handle(), jack_internal_client_load(), jack_get_internal_client_name(), jack_internal_client_unload(), jack_get_xrun_delayed_usecs(), jack_client_open(), and jack_get_client_name(). See documentation for details. Removed functions jack_set_server_dir(), jack_create_thread() Added header file <jack/statistics.h> ALSA, OSS, and CoreAudio drivers now have -I/-O options for setting systemic latency. Added client request type RecomputeTotalLatencies Compiles and runs on MacOSX 10.4 Change the way threads get RT scheduling. it is now requested by the thread rather than assigned by the thread's parent. in cases where capabilities are used, the child is also given capabilities so that it can release + re-acquire RT scheduling as needed. Prevent watchdog from killing anything is JACK is freewheeling. And of course tons of bug fixes. Sincerely, Taybin Rutkin

20 years, 3 months

[linux-audio-dev] IO priorities

by Lee Revell

Disk IO priorities have been discussed on the list before, and they are now in the mainline kernel (search LKML for "IO priorities" for details). I think they're only supported by the CFQ scheduler. This might be fun for someone to experiment with, I'm sure any HDR application would like this feature. Lee

20 years, 3 months

[linux-audio-dev] [ANN] E-Radium V0.61d

by Kjetil Svalastog Matheussen <k.s.matheussen＠notam02.no>

http://www.notam02.no/radium/ INTRODUCTION ------------ E-radium is Radium and a special version of E-UAE. Radium is a midi music editor for the amiga and E-Uae is an amiga emulator. CHANGES ------- 0.61c -> 0.6d: -Increased amount of Z3-memory from 32 to 64. Also increased the amount of chip-mem from 2 to 8 to let there be more time to quit/save after getting a warning about too little memory. For now, this seems to work... -Lowered the keyboard repeat rate a bit. -Fixed make install -Use standard mouse pointer. -Upgraded Radium from 0.61c to 0.61d: -Added scroll-mouse support. Scrolling up is exactly the same as pressing arrow up, and scrolling down is exactly the same as pressing arrow down.

20 years, 3 months

[linux-audio-dev] [OT] 2-D slider widget?

by James McDermott

Has anyone written code for, or even just seen, a 2-D slider widget? What toolkit was it in? Do people around here prefer QT to GTK+, or vice versa, and does anyone use FLTK, or something else? I think the ideal widget would allow the user to click or click-and-drag a cursor around the 2-D area, returning x and y coordinates of course; and would allow a bitmap to be displayed underneath the cursor; and would allow some way to constrain the cursor movements (eg within a circular area inside the widget). Such a thing would be great for lots of audio applications, like controlling filter cutoff and resonance at the same time. That's what I'll be doing, only a bit more complicated..!

20 years, 3 months

[linux-audio-dev] [a bit OT] scroll and zoom conventions

by Alfons Adriaensen

Hello all, I'm trying to clear up my mind as to what conventions to follow in a GUI for the actions of zooming in and out e.g. a spectrum or an impulse response window. It's not the intention to launch a debate about this, just to collect other people's ideas. The accepted model for scrolling is that the user 'moves' a *clipbox* that determines what part of the *content* is visible. For example, when you drag a scrollbar to the right, the clipbox moves to the right. What actually happens of course is just the opposite: the clipbox remains static on the screen, and the content moves to the left. The other model is used as well, for example Acrobat Reader lets you drag the content directly. Now my question: what about zooming ? For keyboard shortcuts, Ardour uses '+' to zoom out and '-' to zoom in. This is consistent with the idea that the user modifies the clipbox. But I still have to think before using it, each time, and I could easily imagine using '+' to zoom in. In fact I have no clear preference. Then there's the questions of icons. If in addition to the arrows in a scrollbar you would also have small buttons to zoom in and out, what should they look like ? Zoom in Zoom out - + -><- <-> or the inverse ??? -- FA

20 years, 3 months

[linux-audio-dev] Gamepad as midi controller?

by Jens M Andreasen

Hi! Today I went downtown to the big store, to buy a few things I need for other purposes. They sell computer related stuff as well, and I picked up a gamepad which had an analogue mini joystick buildin. I've always thoght that gamepads are glorified arrow keys, but that mini analogue joystick left me wondering ... Anybody here have had any luck using something like that under Linux? For the price of only slightly more than a scrollwheel mouse I think it's a bargain. Could find good use for balancing out parameters in a 2d space. It has quite a few buttons also that could be useful for selecting modes. It is a USB device (great), but the box says only that it works with all versions of Windows known to mankind ... It looks like this: http://www.clasohlson.se/images/products/S/hi/B/326344_X_2004-08-09_121320.… So, could this be an answer to the budget synthesists need for hands on control of his linux based softsynths? mvh // Jens M Andreasen

20 years, 3 months

[linux-audio-dev] gcc4 patch for swh plugins

by Doug McLain

Here is a patch that got swh plugins built for me on FC4 gcc version 4.0.0 20050519 (Red Hat 4.0.0-8) the original fails on gcc4 for both use of a removed optimize option -fmove-all-movables and for declaring an already defined non-static variable as static. More on the removed optimization flag here: http://gcc.gnu.org/gcc-4.0/changes.html The options |-freduce-all-givs| and |-fmove-all-movables| have been discontinued. They were used to circumvent a shortcoming in the heuristics of the old loop optimization code with respect to common Fortran constructs. The new (tree) loop optimizer works differently and doesn't need those work-arounds. -- http://nostar.net/

20 years, 3 months

[linux-audio-dev] AI Composer Competition

by Leonard "paniq" Ritter

http://www.paniq.org/index.php/AI_Composer_Competition -- -- leonard "paniq" ritter -- http://www.paniq.org -- http://www.mjoo.org

20 years, 3 months

Jump to page:

2025

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