SYNOPSIS
cdda2wav [-c chans] [-s] [-m] [-b bits] [-r rate] [-a divider] [-t
track[+endtrack]] [-i index] [-o offset] [-d duration] [-x] [-q] [-w]
[-v optlist] [-V] [-Q] [-J] [-L cddbmode] [-R] [-P sectors] [-F] [-G]
[-T] [-e] [-p percentage] [-n sectors] [-l buffers] [-N] [-J] [-H] [-g]
[-B] [dev= device] [-A auxdevice] [-I interface] [-O audiotype] [-C
input-endianess] [-E output-endianess] [-M count] [-S speed] [-para-
noia] [-paraopts=list] [cddbp-server=servername] [cddbp-port=portnum-
ber] [filename(s) or directories]
DESCRIPTION
cdda2wav can retrieve audio tracks from CDROM drives (see README for a
list of drives) that are capable of reading audio data digitally to the
host
As cdda2wav may be directed to write the audio data to stdout, it
writes all it's informational output to stderr by default. See
out-fd=descriptor option below. (CDDA).
OPTIONS
dev=device
-D device
-device device
uses device as the source for CDDA reading. For example
/dev/cdrom for the cooked_ioctl interface and Bus,ID,Lun for the
generic_scsi interface. The device has to correspond with the
interface setting (see below).
Using the cooked_ioctl is not recommended as this makes cdda2wav
mainly depend on the audio extraction quality of the operating
system which is usually extremely bad.
The setting of the environment variable CDDA_DEVICE is overrid-
den by this option.
If no dev= option is present, or if the dev= option only con-
tains a transport specifyer but no address, cdda2wav tries to
scan the SCSI address space for CD-ROM drives. If exactly one
is found, this is used by default.
ts=# Set the maximum transfer size for a single SCSI command to #.
The syntax for the ts= option is the same as for cdrecord fs=#
or sdd bs=#.
If no ts= option has been specified, cdda2wav defaults to a
transfer size of 3 MB. If libscg gets lower values from the
operating system, the value is reduced to the maximum value that
is possible with the current operating system. Sometimes, it
may help to further reduce the transfer size or to enhance it,
out-fd=descriptor
Redirect informational output to the file descriptor named by
descriptor. The parameter descriptor specifies a UNIX file
descriptor number. Redirecting the informational output to a
different file descriptor helps gui's and other programs that
call cdda2wav via pipes.
audio-fd=descriptor
In case that the file name for the audio data file is "-", redi-
rect audio output to the file descriptor named by descriptor.
The parameter descriptor specifies a UNIX file descriptor num-
ber. Redirecting the audio output to a different file descrip-
tor helps gui's and other programs that call cdda2wav via pipes.
-c channels
-channels channels
uses 1 for mono, or 2 for stereo recording, or s for stereo
recording with both channels swapped.
-s
-stereo
sets to stereo recording.
-m
-mono sets to mono recording.
-x
-max sets maximum (CD) quality.
-b bits
-bits-per-sample bits
sets bits per sample per channel: 8, 12 or 16.
-r rate
-rate rate
sets rate in samples per second. Possible values are listed
with the -R option.
-a divider
-divider divider
sets rate to 44100Hz / divider. Possible values are listed with
the -R option.
-R
-l buffers
-buffers-in-ring buffers
uses a ring buffer with buffers total.
-t track+endtrack
-track track+endtrack
selects the start track and optionally the end track.
-i index
-index index
selects the start index.
-o offset
-offset offset
starts offset sectors behind start track (one sector equivalents
1/75 seconds).
-start-sector sector
set an absolute start sector. This option is mutually exclusive
to -track and -offset.
-O audiotype
-output-format audiotype
can be wav (for wav files) or aiff (for apple/sgi aiff files) or
aifc (for apple/sgi aifc files) or au or sun (for sun .au PCM
files) or cdr or raw (for headerless files to be used for cd
writers).
-C endianess
-cdrom-endianess endianess
sets endianess of the input samples to 'little', 'big' or
'guess' to override defaults.
-E endianess
-output-endianess endianess
sets endianess of the output samples to 'little' or 'big' to
override defaults.
-d duration
-duration duration
sets recording time in seconds or frames. Frames (sectors) are
indicated by a 'f' suffix (like 75f for 75 sectors). 0 sets the
time for whole track.
finds extrem amplitudes in samples.
-G
-find-mono
finds if input samples are in mono.
-T
-deemphasize
undo the effect of pre-emphasis in the input samples.
-e
-echo copies audio data to sound device e.g. /dev/dsp.
sound-device=sounddevice
set an alternate sound device to use for -e.
-p percentage
-playback-realtime percentage
changes pitch of audio data copied to sound device.
-v itemlist
-verbose-level itemlist
prints verbose information about the CD. Level is a list of
comma seperated suboptions. Each suboption controls the type of
information to be reported.
center box; r | l. Suboption Description _ disable no infor-
mation is given, warnings appear however all all information is
given toc show table of contents summary show a summary of
the recording parameters indices determine and display index
offsets catalog retrieve and display the media catalog number
MCN trackid retrieve and display all Intern. Standard Record-
ing Codes ISRC sectors show the table of contents in start
sector notation titles show the table of contents with track
titles (when available)
-N
-no-write
does not write to a file, it just reads (for debugging pur-
poses).
-J
-info-only
does not write to a file, it just gives information about the
disc.
cddbp-port=portnumber
sets the port number to be used for title lookups.
-H
-no-infofile
does not write an info file and a cddb file.
-g
-gui formats the output to be better parsable by gui frontends.
-M count
-md5 count
enables calculation of MD-5 checksum for 'count' bytes from a
beginning of a track.
-S speed
-speed speed
sets the cdrom device to one of the selectable speeds for read-
ing.
-q
-quiet quiet operation, no screen output.
-V
-verbose-scsi
enable SCSI command logging to the console. This is mainly used
for debugging.
-Q
-silent-scsi
suppress SCSI command error reports to the console. This is
mainly used for guis.
-scanbus
Scan all SCSI devices on all SCSI busses and print the inquiry
strings. This option may be used to find SCSI address of the
CD/DVD-Recorder on a system. The numbers printed out as labels
are computed by: bus * 100 + target
-paranoia
use the paranoia library as a filter on top of cdda2wav's rou-
tines for reading. If the paranoia mode is used, cdda2wav dis-
plays some quality statistics for each extracted track. The
following items appear in the list:
noia options. disable disables paranoia mode. Paranoia is
still being used no-verify switches verify off, and static over-
lap on retries=amount set the number of maximum retries per sec-
tor overlap=amount set the number of sectors used for statical
paranoia overlap minoverlap=amt set the min. number of sectors
for dynamic paranoia overlap maxoverlap=amt set the max. number
of sectors for dynamic paranoia overlap
-h
-help display version of cdda2wav on standard output.
-version
display version and Copyright information.
Defaults depend on the
Makefile and environment variable settings (currently
CDDA_DEVICE ).
ENVIRONMENT VARIABLES
CDDA_DEVICE is used to set the device name. The device naming is com-
patible with Joerg Schilling's cdrecord package.
CDDBP_SERVER
is used for cddbp title lookups when supplied.
CDDBP_PORT
is used for cddbp title lookups when supplied.
RSH If the RSH environment variable is present, the remote connec-
tion will not be created via rcmd(3) but by calling the program
pointed to by RSH. Use e.g. RSH=/usr/bin/ssh to create a
secure shell connection.
Note that this forces cdda2wav to create a pipe to the rsh(1)
program and disallows cdda2wav to directly access the network
socket to the remote server. This makes it impossible to set up
performance parameters and slows down the connection compared to
a root initiated rcmd(3) connection.
RSCSI If the RSCSI environment variable is present, the remote SCSI
server will not be the program /usr/local/sbin/rscsi but the
program pointed to by RSCSI. Note that the remote SCSI server
program name will be ignored if you log in using an account that
has been created with a remote SCSI server program as login
shell.
RETURN VALUES
cdda2wav uses the following exit codes to indicate various degress of
success:
16 error in semaphore operation encountered (install / request).
17 could not get the scsi transfer buffer. 18 could not create
pipes for process communication (in forked mode).
DISCUSSION
cdda2wav is able to read parts of an audio CD or multimedia CDROM (con-
taining audio parts) directly digitally. These parts can be written to
a file, a pipe, or to a sound device.
cdda2wav stands for CDDA to WAV (where CDDA stands for compact disc
digital audio and WAV is a sound sample format introduced by MS Win-
dows). It allows copying CDDA audio data from the CDROM drive into a
file in WAV or other formats.
The latest versions try to get higher real-time scheduling priorities
to ensure smooth (uninterrupted) operation. These priorities are avail-
able for super users and are higher than those of 'normal' processes.
Thus delays are minimized.
If your CDROM is on device DEV and it is loaded with an audio CD, you
may simply invoke cdda2wav dev=DEV and it will create the sound file
audio.wav recording the whole track beginning with track 1 in stereo at
16 bit at 44100 Hz sample rate, if your file system has enough space
free. Otherwise recording time will be limited. For details see files
README and README.INSTALL
HINTS ON OPTIONS
Options
Most of the options are used to control the format of the WAV
file. In the following text all of them are described.
Select Device
-D device selects the CDROM drive device to be used. The speci-
fier given should correspond to the selected interface (see
below). CHANGE! For the cooked_ioctl interface this is the
cdrom device descriptor as before. The SCSI devices used with
the generic SCSI interface however are now addressed with their
SCSI-Bus, SCSI-Id, and SCSI-Lun instead of the generic SCSI
device descriptor!!! One example for a SCSI CDROM drive on bus
0 with SCSI ID 3 and lun 0 is -D0,3,0.
Select Auxiliary device
-A auxdevice is necessary for CD-Extra handling. For Non-SCSI-
CDROM drives this is the same device as given by -D (see above).
For SCSI-CDROM drives it is the CDROM drive (SCSI) device (i.e.
/dev/sr0 ) corresponding to the SCSI device (i.e. 0,3,0 ). It
has to match the device used for sampling.
Select Interface
-I interface selects the CDROM drive interface. For SCSI drives
use generic_scsi (cooked_ioctl may not yet be available for all
devices): generic_scsi and cooked_ioctl. The first uses the
used).
Change pitch of echoed audio
-p percentage changes the pitch of all audio echoed to a sound
card. Only the copy to the soundcard is affected, the recorded
audio samples in a file remain the same. Normal pitch, which is
the default, is given by 100%. Lower percentages correspond to
lower pitches, i.e. -p 50 transposes the audio output one
octave lower. See also the script pitchplay as an example. This
option was contributed by Raul Sobon.
Select mono or stereo recording
-m or -c 1 selects mono recording (both stereo channels are
mixed), -s or -c 2 or -c s selects stereo recording. Parameter s
will swap both sound channels.
Select maximum quality
-x will set stereo, 16 bits per sample at 44.1 KHz (full CD
quality). Note that other format options given later can change
this setting.
Select sample quality
-b 8 specifies 8 bit (1 Byte) for each sample in each channel;
-b 12 specifies 12 bit (2 Byte) for each sample in each channel;
-b 16 specifies 16 bit (2 Byte) for each sample in each channel
(Ensure that your sample player or sound card is capable of
playing 12-bit or 16-bit samples). Selecting 12 or 16 bits dou-
bles file size. 12-bit samples are aligned to 16-bit samples,
so they waste some disk space.
Select sample rate
-r samplerate selects a sample rate. samplerate can be in a
range between 44100 and 900. Option -R lists all available
rates.
Select sample rate divider
-a divider selects a sample rate divider. divider can be mini-
mally 1 and maximally 50.5 and everything between in steps of
0.5. Option -R lists all available rates.
To make the sound smoother at lower sampling rates, cdda2wav
sums over n samples (where n is the specific dividend). So for
22050 Hertz output we have to sum over 2 samples, for 900 Hertz
we have to sum over 49 samples. This cancels higher frequen-
cies. Standard sector size of an audio CD (ignoring additional
information) is 2352 Bytes. In order to finish summing for an
output sample at sector boundaries the rates above have to be
choosen. Arbitrary sampling rates in high quality would require
some interpolation scheme, which needs much more sophisticated
programming.
List a table of all sampling rates
than 1 will invoke the index scanner, which will take some time
to find the correct start position. An offset may be given addi-
tionally (see below).
Set recording time
-d n sets recording time to n seconds or set recording time for
whole track if n is zero. In order to specify the duration in
frames (sectors) also, the argument can have an appended 'f'.
Then the numerical argument is to be taken as frames (sectors)
rather than seconds. Please note that if track ranges are being
used they define the recording time as well thus overriding any
-d option specified times.
Recording time is defined as the time the generated sample will
play (at the defined sample rate). Since it's related to the
amount of generated samples, it's not the time of the sampling
process itself (which can be less or more). It's neither
strictly coupled with the time information on the audio CD
(shown by your hifi CD player). Differences can occur by the
usage of the -o option (see below). Notice that recording time
will be shortened, unless enough disk space exists. Recording
can be aborted at anytime by pressing the break character (sig-
nal SIGQUIT).
Record all tracks of a complete audio CD in seperate files
-B copies each track into a seperate file. A base name can be
given. File names have an appended track number and an extension
corresponding to the audio format. To record all audio tracks of
a CD, use a sufficient high duration (i.e. -d99999).
Set start sector offset
-o sectors increments start sector of the track by sectors. By
this option you are able to skip a certain amount at the begin-
ning of a track so you can pick exactly the part you want. Each
sector runs for 1/75 seconds, so you have very fine control. If
your offset is so high that it would not fit into the current
track, a warning message is issued and the offset is ignored.
Recording time is not reduced. (To skip introductory quiet pas-
sages automagically, use the -w option see below.)
Wait for signal option
-w Turning on this option will suppress all silent output at
startup, reducing possibly file size. cdda2wav will watch for
any signal in the output signal and switches on writing to file.
Find extrem samples
-F Turning on this option will display the most negative and the
most positive sample value found during recording for both chan-
nels. This can be useful for readjusting the volume. The values
shown are not reset at track boundaries, they cover the complete
sampling process. They are taken from the original samples and
have the same format (i.e. they are independent of the selected
scanner will be started, which reads the q-subchannel of each
track. If pre-emphasis is indicated in the q-subchannel of a
track, but not in the TOC, pre-emphasis will be assumed to be
present, and subsequently a reverse filtering is done for this
track before the samples are written into the audio file.
Set audio format
-O audiotype can be wav (for wav files) or au or sun (for sun
PCM files) or cdr or raw (for headerless files to be used for cd
writers). All file samples are coded in linear pulse code modu-
lation (as done in the audio compact disc format). This holds
for all audio formats. Wav files are compatible to Wind*ws
sound files, they have lsb,msb byte order as being used on the
audio cd. The default filename extension is '.wav'. Sun type
files are not like the older common logarithmically coded .au
files, but instead as mentioned above linear PCM is used. The
byte order is msb,lsb to be compatible. The default filename
extension is '.au'. The AIFF and the newer variant AIFC from
the Apple/SGI world store their samples in bigendian format
(msb,lsb). In AIFC no compression is used. Finally the easiest
'format', the cdr aka raw format. It is done per default in
msb,lsb byte order to satisfy the order wanted by most cd writ-
ers. Since there is no header information in this format, the
sample parameters can only be identified by playing the samples
on a soundcard or similiar. The default filename extension is
'.cdr' or '.raw'.
Select cdrom drive reading speed
-S speed allows to switch the cdrom drive to a certain level of
speed in order to reduce read errors. The argument is transfered
verbatim to the drive. Details depend very much on the cdrom
drives. An argument of 0 for example is often the default speed
of the drive, a value of 1 often selects single speed.
Enable MD5 checksums
-M count enables calculation of MD-5 checksum for 'count' bytes
from the beginning of a track. This was introduced for quick
comparisons of tracks.
Use Monty's libparanoia for reading of sectors
-paranoia selects an alternate way of extracting audio sectors.
Monty's library is used with the following default options:
PARANOIA_MODE_FULL, but without PARANOIA_MODE_NEVERSKIP
for details see Monty's libparanoia documentation. In this case
the option -P has no effect.
Do linear or overlapping reading of sectors
(This applies unless option -paranoia is used.) -P sectors
sets the given number of sectors for initial overlap sampling
for jitter correction. Two cases are to be distinguished. For
Set the transfer size
-n sectors will set the transfer size to the specified sectors
per request.
Set number of ring buffer elements
-l buffers will allocate the specified number of ring buffer
elements.
Set endianess of input samples
-C endianess will override the default settings of the input
format. Endianess can be set explicitly to "little" or "big" or
to the automatic endianess detection based on voting with
"guess".
Set endianess of output samples
-E endianess (endianess can be "little" or "big") will override
the default settings of the output format.
Verbose option
-v itemlist prints more information. A list allows selection of
different information items.
disable keeps quiet
toc displays the table of contents
summary displays a summary of recording parameters
indices invokes the index scanner and displays start positions
of indices
catalog retrieves and displays a media catalog number
trackid retrieves and displays international standard recording
codes
sectors displays track start positions in absolute sector nota-
tion
To combine several requests just list the suboptions seperated
with commas.
The table of contents
The display will show the table of contents with number of
tracks and total time (displayed in mm:ss.hh format, mm=minutes,
ss=seconds, hh=rounded 1/100 seconds). The following list dis-
plays track number and track time for each entry. The summary
gives a line per track describing the type of the track.
track preemphasis copypermitted tracktype chans
The track column holds the track number. preemphasis shows if
Generation of simple output for gui frontends
-g this option switches on simple line formatting, which is
needed to support gui frontends (like xcd-roast).
Verbose SCSI logging
-V this option switches on logging of SCSI commands. This will
produce a lot of output (when SCSI devices are being used).
This is needed for debugging purposes. The format is the same as
being used with the cdrecord program from Joerg Schilling. I
will not describe it here.
Quiet option
-q suppresses all screen output except error messages. That
reduces cpu time resources.
Just show information option
-J does not write a file, it only prints information about the
disc (depending on the -v option). This is just for information
purposes.
CDDBP support
Lookup album and track titles option
-L cddbp mode Cdda2wav tries to retrieve performer, album-, and
track titles from a cddbp server. The default server right now
is 'freedb.freedb.org'. It is planned to have more control over
the server handling later. The parameter defines how multiple
entries are handled:
0 interactive mode, the user chooses one of the entries.
1 take the first entry without asking.
Set server for title lookups
cddbp-server servername When using -L or -cddb, the server
being contacted can be set with this option.
Set portnumber for title lookups
cddbp-port portnumber When using -L or -cddb, the server port
being contacted can be set with this option.
HINTS ON USAGE
Don't create samples you cannot read. First check your sample player
software and sound card hardware. I experienced problems with very low
sample rates (stereo <= 1575 Hz, mono <= 3675 Hz) when trying to play
them with standard WAV players for sound blaster (maybe they are not
legal in WAV format). Most CD-Writers insist on audio samples in a
bigendian format. Now cdda2wav supports the -E endianess option to
control the endianess of the written samples.
If your hardware is fast enough to run cdda2wav uninterrupted and your
CD drive is one of the 'perfect' ones, you will gain speed when switch-
ing all overlap sampling off with the -P 0 option. Further fine tuning
FILES
Cdda2wav can generate a lot of files for various purposes.
Audio files:
There are audio files containing samples with default extensions These
files are not generated when option (-N) is given. Multiple files may
be written when the bulk copy option (-B) is used. Individual file
names can be given as arguments. If the number of file names given is
sufficient to cover all included audio tracks, the file names will be
used verbatim. Otherwise, if there are less file names than files
needed to write the included tracks, the part of the file name before
the extension is extended with '_dd' where dd represents the current
track number.
Cddb and Cdindex files:
If cdda2wav detects cd-extra or cd-text (album/track) title informa-
tion, then .cddb and .cdindex files are generated unless suppressed by
the option -H. They contain suitable formatted entries for submission
to audio cd track title databases in the internet. The CDINDEX and
CDDB(tm) systems are currently supported. For more information please
visit www.musicbrainz.org and www.freedb.com.
Inf files:
The inf files are describing the sample files and the part from the
audio cd, it was taken from. They are a means to transfer information
to a cd burning program like cdrecord. For example, if the original
audio cd had pre-emphasis enabled, and cdda2wav -T did remove the pre-
emphasis, then the inf file has pre-emphasis not set (since the audio
file does not have it anymore), while the .cddb and the .cdindex have
pre-emphasis set as the original does.
WARNING
IMPORTANT: it is prohibited to sell copies of copyrighted material by
noncopyright holders. This program may not be used to circumvent copy-
rights. The user acknowledges this constraint when using the software.
BUGS
Generation of md5 checksums is currently broken.
Performance may not be optimal on slower systems.
The index scanner may give timeouts.
The resampling (rate conversion code) uses polynomial interpolation,
which is not optimal.
Cdda2wav should use threads.
DATE
11 Sep 2002
CDDA2WAV(1)
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