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 per-
centage] [-n sectors] [-l buffers] [-N] [-J] [-H] [-g]
[-B] [-D device] [-A auxdevice] [-I interface] [-O audio-
type] [-C input-endianess] [-E output-endianess] [-M
count] [-S speed] [-paranoia] [cddbp-server=servername]
[cddbp-port=portnumber] [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 (CDDA).
OPTIONS
-D device --dev --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). The setting of the environment vari-
able CDDA_DEVICE is overridden by this option.
-A auxdevice --auxdevice
uses auxdevice as CDROM drive for ioctl usage.
-I interface --interface
specifies the interface for CDROM access:
generic_scsi or (on Linux, and FreeBSD systems)
cooked_ioctl.
-c 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
sets bits per sample per channel: 8, 12 or 16.
-r rate --rate
sets rate in samples per second. Possible values
-n sectors --sectors-per-request
reads sectors per request.
-l buffers --buffers-in-ring
uses a ring buffer with buffers total.
-t track+endtrack --track
selects the start track and optionally the end
track.
-i index --index
selects the start index.
-o offset --offset
starts offset sectors behind start track (one sec-
tor equivalents 1/75 seconds).
-O audiotype --output-format
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
sets endianess of the input samples to 'little',
'big' or 'guess' to override defaults.
-E endianess --output-endianess
sets endianess of the output samples to 'little' or
'big' to override defaults.
-d 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.
-B --bulk --alltracks
copies each track into a seperate file.
-w --wait
waits for signal, then start recording.
-F --find-extremes
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 sam-
ples.
| disable | no information 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 Recording 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 debug-
ging purposes).
-J --info-only
does not write to a file, it just gives information
about the disc.
-L cddb mode --cddb
does a cddbp album- and track title lookup based on
the cddb id. The parameter cddb mode defines how
multiple entries shall be handled.
cddbp-server=servername
sets the server to be contacted for title lookups.
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
enables calculation of MD-5 checksum for 'count'
bytes from a beginning of a track.
-S speed --speed
sets the cdrom device to one of the selectable
speeds for reading.
-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
ENVIRONMENT VARIABLES
CDDA_DEVICE is used to set the device name. The device
naming is compatible with Jörg Schilling's cdrecord pack-
age.
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 connection 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 perfor-
mance parameters and slows down the connection com-
pared to a root initiated rcmd(3) connection.
RSCSI If the RSCSI environment variable is present, the
remote SCSI server will not be the program
/opt/schily/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:
+---------+--------------------------------------------------------------------+
|Exitcode | Description |
+---------+--------------------------------------------------------------------+
| 0 | no errors encountered, successful operation. |
| 1 | usage or syntax error. cdda2wav got inconsistent arguments. |
| 2 | permission (un)set errors. permission changes failed. |
| 3 | read errors on the cdrom/burner device encountered. |
| 4 | write errors while writing one of the output files encountered. |
| 5 | errors with soundcard handling (initialization/write). |
| 6 | errors with stat() system call on the read device (cooked ioctl). |
| 7 | pipe communication errors encountered (in forked mode). |
| 8 | signal handler installation errors encountered. |
| 9 | allocation of shared memory failed (in forked mode). |
| 10 | dynamic heap memory allocation failed. |
| 11 | errors on the audio cd medium encountered. |
| 12 | device open error in ioctl handling detected. |
| 13 | race condition in ioctl interface handling detected. |
mat introduced by MS Windows). 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 available 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 specifier 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 descrip-
tor!!! 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 generic SCSI
interface, the latter uses the ioctl of the CDROM
driver. The latter variant works only when the ker-
nel driver supports CDDA reading. This entry has to
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 cor-
respond 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 doubles 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 minimally 1 and maximally 50.5 and every-
thing 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 spe-
cific 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 frequencies.
Standard sector size of an audio CD (ignoring addi-
tional information) is 2352 Bytes. In order to fin-
These tracks must be from the table of contents.
This sets the track where recording begins. Record-
ing can advance through the following tracks as
well (limited by the optional end track or other-
wise depending on recording time). Whether one file
or different files are then created depends on the
-B option (see below).
Select start index
-i n selects the index to start recording with.
Indices other than 1 will invoke the index scanner,
which will take some time to find the correct start
position. An offset may be given additionally (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 record-
ing 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 sam-
ples, 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). Differ-
ences can occur by the usage of the -o option (see
below). Notice that recording time will be short-
ened, unless enough disk space exists. Recording
can be aborted at anytime by pressing the break
character (signal 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 beginning of a track so you
can pick exactly the part you want. Each sector
runs for 1/75 seconds, so you have very fine con-
negative and the most positive sample value found
during recording for both channels. 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 output for-
mat).
Find if input samples are in mono
-G If this option is given, input samples for both
channels will be compared. At the end of the pro-
gram the result is printed. Differences in the
channels indicate stereo, otherwise when both chan-
nels are equal it will indicate mono.
Undo the pre-emphasis in the input samples
-T Some older audio CDs are recorded with a modi-
fied frequency response called pre-emphasis. This
is found mostly in classical recordings. The cor-
rection can be seen in the flags of the Table Of
Contents often. But there are recordings, that show
this setting only in the subchannels. If this
option is given, the index 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 header-
less files to be used for cd writers). All file
samples are coded in linear pulse code modulation
(as done in the audio compact disc format). This
holds for all audio formats. Wav files are compat-
ible 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 easi-
est 'format', the cdr aka raw format. It is done
per default in msb,lsb byte order to satisfy the
order wanted by most cd writers. Since there is no
header information in this format, the sample
-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_NEV-
ERSKIP
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 ini-
tial overlap sampling for jitter correction. Two
cases are to be distinguished. For nonzero values,
some sectors are read twice to enable cdda2wav's
jitter correction. If an argument of zero is
given, no overlap sampling will be used. For
nonzero overlap sectors cdda2wav dynamically
adjusts the setting during sampling (like cdpara-
noia does). If no match can be found, cdda2wav
retries the read with an increased overlap. If the
amount of jitter is lower than the current over-
lapped samples, cdda2wav reduces the overlap set-
ting, resulting in a higher reading speed. The
argument given has to be lower than the total num-
ber of sectors per request (see option -n below).
Cdda2wav will check this setting and issues a error
message otherwise. The case of zero sectors is
nice on low load situations or errorfree (perfect)
cdrom drives and perfect (not scratched) audio cds.
Set the transfer size
-n sectors will set the transfer size to the spec-
ified 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
indices invokes the index scanner and displays
start positions of indices
catalog retrieves and displays a media catalog num-
ber
trackid retrieves and displays international stan-
dard recording codes
sectors displays track start positions in absolute
sector notation
To combine several requests just list the subop-
tions 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 displays 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. preempha-
sis shows if that track has been given a non linear
frequency response. NOTE: You can undo this effect
with the -T option. copy-permitted indicates if
this track is allowed to copy. tracktype can be
data or audio. On multimedia CDs (except hidden
track CDs) both of them should be present. chan-
nels is defined for audio tracks only. There can be
two or four channels.
No file output
-N this debugging option switches off writing to a
file.
No infofile generation
-H this option switches off creation of an info
file and a cddb file.
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 com-
mands. This will produce a lot of output (when SCSI
CDDBP support
Lookup album and track titles option
-L cddbp mode Cdda2wav tries to retrieve per-
former, 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 param-
eter 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 experi-
enced problems with very low sample rates (stereo <= 1575
Hz, mono <= 3675 Hz) when trying to play them with stan-
dard WAV players for sound blaster (maybe they are not
legal in WAV format). Most CD-Writers insist on audio sam-
ples 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 uninter-
rupted and your CD drive is one of the 'perfect' ones, you
will gain speed when switching all overlap sampling off
with the -P 0 option. Further fine tuning can be done
with the -n sectors option. You can specify how much sec-
tors should be requested in one go.
Cdda2wav supports pipes now. Use a filename of - to let
cdda2wav output its samples to standard output.
Conversion to other sound formats can be done using the
sox program package (although the use of sox -x to change
the byte order of samples should be no more necessary; see
option -E to change the output byteorder).
If you want to sample more than one track into different
files in one run, this is currently possible with the -B
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 information, then .cddb and .cdindex files are gen-
erated 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 infor-
mation 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 origi-
nal does.
WARNING
IMPORTANT: it is prohibited to sell copies of copyrighted
material by noncopyright holders. This program may not be
used to circumvent copyrights. 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.
Cdda2wav currently cannot sample hidden audio tracks
(track 1 index 0).
ACKNOWLEDGEMENTS
Thanks goto Project MODE (http://www.mode.net/) and Fraun-
hofer Institut für integrierte Schaltungen (FhG-IIS)
CDDA2WAV(1)
Man(1) output converted with
man2html
FhG Homepage
FOKUS Homepage
Schily's Homepage
