A changelog by Daniel Mettler

Currently I am ripping some of my CDs. The problem: It takes too much time. Fortunately there’s a very good CD ripper for Linux, unspectacularly called abcde.

With abcde, ripping your CDs and encoding the wav files to mp3 files can be reduced to the following two tasks:

1) Insert a CD into your CDROM drive
2) execute “abcde -o mp3” (on the console)

That simple. abcde rips the tracks, encodes them to mp3 format (with adequate settings like 128 kbit/s data rate) and even automatically tags the whole stuff correctly, using CDDB. I’ve already tried some commercial rippers/encoders for Windows, but “abcde” beats them all in ease of use, speed and quality of the output. Amazing..

Ripping CDs still isn’t a pleasure. But if you do it, do it right.

To enable sound support on your Lex barebone (VIA Eden board), all you need to do is to compile and load the following driver:

VIA 82C686 Audio Codec (CONFIG_SOUND_VIA82CXXX)
sources: via82cxxx_audio.c
binary module: via82cxxx_audio.o

That’s it!

For playing MP3 files from the console, just

emerge mpg123

and execute

mpg123 mytrack.mp3

other variants include:

mpg123 -@ myplaylist.txt
mpg123 http://my.server.com/mp3stream

some other useful apps [TBC]:

aumix (Aumix volume/mixer control program)
bplay (No-frills command-line buffered player and recorder)
cymbaline (Smart command line Mp3 player)
cvoicecontrol (Console based speech recognition system)
darkice (IceCast live streamer delivering Ogg and mp3 streams simulatenously to multiple hosts. If you want to use your Lex as a streaming server.)
festival (Festival Text to Speech engine)
flite (Flite text to speech engine)
imp3sh (flexible playlist manipulation shell and song player/streamer)
jack-audio-connection-kit (A low-latency audio server)
mad (A high-quality MP3 decoder)
moosic (Moosic is a music player that focuses on easy playlist management)
mp32ogg (A perl script to convert MP3 files to Ogg Vorbis files)
mp3_check (MP3 consistancy checker)
mp3asm (A command line tool to clean and edit mp3 files)
mp3blaster (Command line MP3 player)
mp3c (console based mp3 ripper, with cddb support)
mp3info (An MP3 technical info viewer and ID3 1.x tag editor)
mp3splt (A command line utility to split mp3 and ogg files)
mpg321 (Free replacement for mpg123)
normalize (Audio file volume normalizer)
oggtst (A tool for calculating ogg-vorbis playing time)
ogmtools (These tools allow information about (ogminfo) or extraction from (ogmdemux) or creation of (ogmmerge) OGG media streams)
realplayer (for playing real audio/media)
saydate (A Linux shell program that talks the date and system uptime)
sidplay (C64 SID player)
soundtracker (SoundTracker is a music tracking tool for UNIX/X11 (MOD tracker))
sox (The swiss army knife of sound processing programs)
speechd (Implements /dev/speech (any text written to /dev/speech will be spoken aloud))
splay (splay is an audio player, primarily for the console)
trplayer (a console-based realplayer interface)
umix (Program for adjusting soundcard volumes)
vorbis-tools (tools for using the Ogg Vorbis sound file format)
vorbisgain (vorbisgain calculates a percieved sound level of an Ogg Vorbis file using the ReplayGain algorithm and stores it in the file header)
vsound (Sort a virtual audio loopback cable for RealAudio to wave convertions)
wavplay (A command line player/recorder for wav files)
xmp (Extended Module Player)

Average CPU load when playing MP3s is only about 5-7 %, so this clearly doesn’t hurt your servers’ normal operation. The same goes for flite and festival (two text-to-speech synthesizers)

Now you just need to write a little web app which lets you create playlists and start them on predefined dates and times :) Some ideas:

– Create your own customized raiser. There aren’t any limits regarding programmability. If you like, you can program your wake-up program years in advance ;)
– Make your server automatically create your wake-up program based on your organizer’s entries. Let it set your wake-up time based on your daily duties or let it read aloud your duties of the day!
– Use it for meditation by timing meditation music/messages
– Let your friends choose your wake-up sound via web (add an MP3 upload functionality to your app). Instead of “just” sending you e-greeting cards, they could wake you up with a happy birthday song or a personal message!
– Use your Lex as a superb answering machine. Welcome to “asynchronous telephone”..
– Couple it with your mail account. Receive e-mails with attached MP3s which are played automatically at arrival, whenever you read them or at arbitrary times.
– Let your Lex read aloud your e-mail or notify you whenever there are new important messages (use festival/mbrola or flite for speech synthesis).
– Listen to radio stations all over the world. Wake up as if you were living in Tokyo or Shanghai ;) [Limitations: Some radio stations use a proprietary Windows Media Player audio streaming format for which there aren’t any Linux decoders. Grmbl.]
– Use it as a digital sound recorder
– Use it to send voice mails
– Use speech recognition to control your server by voice-control

[TBC]

Cool, isn’t it? :)

Currently, I feed the output of the following script to a text-to-speech synthesizer (festival) every 10 minutes. Like this, I can check whether there is new important mail for me without having to switch on any of my workstations :)

#!/bin/bash

########################################################################### # # # gotmail # # # # A tiny bash-script which lists the most important headers of new mail # # messages stored in maildir format. Suitable for feeding text-to-speech # # synthesizers. # # # # Copyright (c)2003 Daniel Mettler, https://news.numlock.ch # # # # License: MIT License http://www.opensource.org/licenses/mit-license.php # # # ########################################################################### # new mail folders in maildir format (excluding the trash folder) newmessagefolders=`find ~/.maildir/ -name new | grep -v ".Trash"`; # welcome message ;) echo "Hi $USER. HAL 9001 speaking. Checking your mail now.";

for folder in $newmessagefolders; do newmessages=`find $folder/ -type f`; if [ -n "$newmessages" ]; then # folder contains new messages. how many? count=`echo $newmessages|wc -w`; # note that bash does *not* follow the regular expression syntax cutstart=`echo ${folder/*\.maildir\/\./}`; echo -e "\nYou have ${count/' '/} new messages in ${cutstart/\/new/}"; echo -e "---------------------------------------------------"; for message in $newmessages; do echo; # cat twice to make sure we always have the same order #cat $message|egrep -i "^From:"; # remove brackets for text-to-speech processors cat $message|egrep -i "^From:"|sed -e "s///"; cat $message|egrep -i "^Subject:"; done fi done

(Err.. formatting looks miserable in this posting as MT doesn’t seem to know the <pre> tag. Need to fix this later.)

/etc/crontab:
# mettlerd: make hal read aloud my new mail every 10 minutes */10 * * * * mettlerd gotmail|festival --tts

Feel free to extend and improve this idea (e.g. pull instead of push would be nice. But I would need to do some soldering to achieve this.. or wait.. actually i could “misuse” a joystick or microphone to control my server ;)

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