Posts with the tag Audio

Installing Pulseaudio on Mac OS X 10.7 Lion via Homebrew

The following steps didn't work for me (I could compile pulseaudio but it crashed when loading Apple's Coreaudio support or it wouldn't contain CoreAudio support). So I decided to use the Solution via Soundflower and esound described below the pulseaudio section.

As long as this pull request is not part...

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Apply a Lowpass Filter to an mp3 Audio File

A lowpass filter can be applied using the command line tool sox. It tool can be installed like this on Ubuntu:

sudo aptitude install pacpl sox

Convert the audiofile to wave first (using Perl Audio Converter as sox has no mp3 support compiled in on Ubuntu systems):

pacpl --to...

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Create an Image of a Copy Protected Audio CD Using readom

use the option -clone!

readom dev=/dev/sr0 -clone f=audio-loops.iso

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Get sound working again after Suspending on a HP nx8220 notebook

sudo alsa force-reload

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Composing Music


sudo apt-get install noteedit


commercial Windows software


FL Studio

good supplement: halion player with complete halion 3 sound database


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Text to Speech



echo "Hello world!" | festival --tts


better than recite but not excellent




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Problems on HP nx8220 with Audio Playback (I Assume its pulseaudio)

To start new with pulseaudio:

pulseaudio --kill
rm -rf ~/.pulse ~/.pulse-cookie
pulseaudio --start

Then check access to the soundcard:

sudo lsof | grep /dev/snd

which returns:

pulseaudi 5173     philipp   20u      CHR     116,10    ...

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Convert ape audio files to mp3 on the terminal

Requirements: Having the executables mac, lame and id3v2 installed.
I haven't done it myself yet, but this seems to be a nice and quick way to do a conversion and set the ID3 tags in the newly created MP3:

echo "Artist name?"
a= <span...

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Get Monkey's audio (.ape file format) binaries on Ubuntu amd64 Architecture

sudo -i
echo "deb jaunty main"  >> /etc/apt/sources.list
gpg --recv-keys FB34808D7ED779F6
gpg --export --armor FB34808D7ED779F6 | sudo apt-key add -
sudo apt-get update
sudo apt-get install mac

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M-Audio Transit USB


I took a couple of images of the hardware and put them on PicasaWeb:

The ICs used are:

  • U1 TI TAS1020A (8052 w/USB audio streaming) Stereo USB Audio Interface
  • U2 uC 24LC64 (serial EEPROM) 64 Kbit Electrically Erasable PROM
  • U3 AKM AK4584VQ (audio) 24Bit 96kHz Audio CODEC with DIT/DIR
  • U4 1117M3...

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