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-
- -----------------------------------
- *** Flowerpower's ADPCM package ***
- -----------------------------------
-
- CDRipper documentation
-
- This software package is in the public domain.
- Do with it whatever you want.
-
-
-
- Introduction
- ------------
-
- This program will rip CD audio data from any audio CD using a Toshiba CDRom
- drive and store this in ADPCM2 or ADPCM3 format.
-
- The loading routines are derived from my 14 bit CDPlayer available on
- AmiNet. Sony CDRom support might be added in one of the next releases as
- well as to my 14 Bit CDPlayer.
-
- Some people have reported that this software (as well as my 14 bit
- CDPlayer) works with several IDE and ATAPI CDRoms. These obviously have
- got good SCSI command set emulations, including direct data transfer via
- SCSI bus.
-
-
- Technical Info
- --------------
-
- The CD-DA data will be converted to MONO and downsampled to 22050Hz. An
- optional scaling can be done as well. Then the data will be compressed
- using ADPCM2 or ADPCM3. The ADPCM algorithm is taken from example
- sourcecodes for the ZyXEL modem's voice files.
-
-
- Usage
- -----
-
- This is a Shell-only program. Do not try to start it from Workbench. A
- user interface may be added in the future.
-
- Template: TRACK/N/A, NUMTRACKS/K/N, TO/K/A, BITS/K/N,
- DEVICE/K, UNIT/K/N, MAXIMIZE/S, BOOST/K/N
-
- Examples:
-
- CDRipper 5 TO RAM:Sample BITS=3 DEVICE=gvpscsi.device UNIT=2
-
- CDRipper 3 NUMTRACKS=2 TO RAM:Sample MAXIMIZE BOOST=125
-
-
- TRACK/N/A
-
- The audio track to rip. Be careful: No further checks are done on that
- number!
-
- NUMTRACKS/K/N
-
- This parameter specifies the number of contiguous tracks to rip.
-
- TO/K/A
-
- This keyword must exist. After that you must specify a file name to save
- the sample to.
-
- BITS/K/N
-
- Either specify 2 or 3 for ADPCM2 or ADPCM3 compression. Other values might
- be added in the future (e.g. 8 or 16 for saving as IFF or WAV file)
-
- DEVICE/K
-
- The SCSI device driver to use. This defaults to "scsi.device"
-
- UNIT/K/N
-
- The SCSI unit to use. This must be a CDRom unit. This defaults to 3.
-
- MAXIMIZE/S
-
- If you give this parameter, the program will first scan through the audio
- track(s) and try to find the maximum peak (similar to PEAK SEARCH on your
- CD-Player). Then it will scale the sample to maximum 8 bit dynamics. This
- will reduce the quantisation noise level. Your sample will be louder and
- clearer. But it will take twice the time to rip the track.
-
- BOOST/S
-
- Here you can give a scaling factor for your sample in percent. 100 will
- mean no scaling, 50 means half the volume, 200 will double the volume
- etc... You can also combine this parameter with the MAXIMIZE switch.
-
- The boost factor can further improve the sound quality as it improves the
- signal-to-noise ratio. Values between 100 and 400 usually give best
- results. Using too high boost values may lead to audible distortion,
- similar to overmodulating an audio amplifier.
-
-
-
- The Author
- ----------
-
- Christian Buchner
- Steinbergstraße 2
- 82110 Germering
- Germany
- Tel.: +49-89-849868
-
- EMAIL: flowerp@eikon.e-technik.tu-muenchen.de
-
- <flowerp> on irc #amiga and #amigager
-
- //
- \X/ Flowerpower
-