Tag Archive for 'audio'

Ardour, the free digital audio workstation

Ever played with Ardour? They have just released version 2.8.4 for Linux and OS X.

* Unlimited audio tracks and buses
* Non-destructive, non-linear editing with unlimited undo
* Anything-to-anywhere signal routing
* Unlimited pre- and post-fader plugins
* 32 bit floating point audio path
* Automatic track delay compensation
* Sample accurate automation
* Standard file formats (BWF, WAV, WAV64, AIFF, CAF & more …)
* Full AudioUnit plugin support on OS X
* More than 200 LADSPA & LV2 plugins freely available
* Support for Windows VST plugins available
* MIDI CC control with 1 click
* Level 2 MIDI Machine Control
* MIDI Timecode (MTC) Master or Slave
* Full integration with all JACK applications
* Video-synced playback, pull up/pull down
* No copy-protection
* Distributed, world-wide development
* Released under the GPL
* Source code for everyone
* Open XML session file format
* On OS X, works with any CoreAudio supported audio hardware
* On Linux, works with any ALSA/FFADO-supported audio hardware
* Network audio (full fidelity over local network or long haul with CELT) via NetJack

Sounds good to me! (Excuse the pun.)

Karmic upgrade, broken sound. Workaround.

Upgrading to Karmic on a Dell Optiplex 755 desktop resulted in broken sound.

It’s a very basic and extremely common card:
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 02)

GNOME has no sound, but opening up the mixer shows the device (analogue stereo output) and indeed when I play a sound I can see it come up on the “applications” section of the mixer.

The problem is that not only does no sound come out, but any application (from Totem to aplay) which tries to play audio hangs.

In Jaunty the sound preferences utility was much more powerful. You could choose between Pulseaudio, Alsa, ESD and OSS for various types of sound, everything was much more configurable. Now in Karmic, that’s replaced entirely and no longer possible – it appears to be Pulseaudio or nothing.

So, the “fix” is to purge pulseaudio and utils, leaving only Alsa. Reboot and magically sound works, but we’re not out of the woods yet!

Problem now is that we have no mixer under GNOME because unlike in Jaunty, it can only talk to Pulseaudio. Starting up the mixer from the command line shows it “waiting for server.” Not only that, but Totem still can’t play sound, presumably because it too is waiting for Pulseaudio.

So, what to do next? Install VLC.

This isn’t even a fix, in fact it’s hardly a decent workaround, but it is sufficient for now. How the average user is supposed to deal with this is beyond me. It’s a pity there is no longer the ability to switch between sound servers..

Update: Looks like this has been an unresolved problem for the last three months.

ffmpeg Cheat Sheet

Came across this useful cheat sheet for ffmpeg, for anyone wanting to easily manipulate audio visual material.