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authorDaniel Stenberg <daniel@haxx.se>2008-03-01 00:36:08 +0000
committerDaniel Stenberg <daniel@haxx.se>2008-03-01 00:36:08 +0000
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-Q1. What is a FAQ?
-A1. A rare small animal of the species 'Textius Electronicus'. It is known for
- its helpful attitude and vicious misspellings.
-
-Q2. Okay, fine, what is _this_ FAQ?
-A2. This FAQ is for questions (that we have answers to) that have been asked
- repeatedly either in emails or on IRC.
-
-Q3. What is Rockbox? What is it's purpose?
-A3. The purpose of this project is to write an Open Source replacement
- firmware for the Archos Jukebox 6000, Studio 20 and Recorder MP3 players.
-
-Q4. I want to write code for my Archos, how do I proceed?
-A4. Our guide on first time (http://www.rockbox.org/docs/firsttime.html)
- Rockbox development should answer most of your questions.
-
-Q5: What is CVS?
-A5: Concurrent Versions System (http://www.cvshome.org). We have a small
- help page about how to use this to get, update and commit files on the web
- at http://www.rockbox.org/cvs.html
-
-Q6. What exactly is the CONTRIBUTING file?
-A6. Just like the name implies, it lists conventions that the project follows,
- and in turn asks you to follow, for the formating of source code in
- general.
-
-Q7. Okay, so I read CONTRIBUTING and although I don't agree with all your
- conventions, I am going to be sensible and follow them anyway. Now what?
-A7. Start by reading up on the information about the jukeboxes on our web page.
- Then go into CVS and look at the code we've written. Then take what you
- need and start writing.
-
-Q8. I want to join the development team, but don't have a SourceForge account,
- what should I do?
-A8. You don't need a SourceForge account to help developing Rockbox. Just
- submit patches (http://www.rockbox.org/twiki/bin/view/Main/WorkingWithPatches)
-
- If your patches are consistently well-written and thus accepted, you may
- ultimately be offered CVS commit access. If that should happen, you will
- need to get a Sourceforge account:
- http://sourceforge.net/account/register.php
-
-Q9. Do you have a mailing list?
-A9. Sure do! As a matter of fact, we have several of them for specific things.
- Please check out: http://www.rockbox.org/mail/, and please see FAQ entry
- 75.
-
-Q10. Great you have a mailing list! Is there anyway for me to catch up on
- past posts?
-A10. Check out the archives at: http://www.rockbox.org/mail/
-
-Q11. How can I meet the developers working on the project?
-A11. One way is by visiting us on IRC. Head on over to the server
- irc.openprojects.net, and then join "#rockbox". There is usually at
- least one person there. If you don't see any activity, feel free to post
- questions anyway, several of us log the channel and will get you answers
- when we unidle.
-
-Q12: Wow, you guys talk on IRC a lot? I wish I had been around for those
- conversations to see what happened.
-A12: We are glad you mentioned that! http://www.rockbox.org/irc happens
- to have a list of various logs we have recorded of events in the channel.
- Feel free to read up, and ask questions on what you find.
-
-Q13. What is this "SourceForge" you keep mentioning?
-A13. http://www.sourceforge.net
-
-Q14. Can the changes or the software that Rockbox suggests or offers
- possibly damage my Archos Player?
-A14. All firmware mods that are presented are still highly experimental.
- Try them at your own risk. We offer no guarantee that this software, or
- the hardware modifications we show, will not damage your player or void
- your warranty. That said, we have not been able to damage any of our
- units by modifying only the firmware. You can accidentally password
- protect your hard disk, but there are ways around that. (See below.)
-
-Q15. I want to see what the inside of my player looks like, but I would really
- like to avoid voiding my warranty. Is there anything you can suggest?
-A15. We have a collection of photos of both the player and recorder. Look at
- http://www.rockbox.org/internals/
-
-Q16. What exactly are you trying to achieve with this line of development?
- (A.K.A. what's your purpose for being here?)
-A16. Firstly, we wouldn't start something like this if we didn't simply enjoy
- it profusely. This is great fun!
- Secondly, we feel the original firmware is lacking some features and
- contains a number of annoying bugs that we don't want to live with.
-
-Q17. You mention supporting Ogg Vorbis and other file types on your list of
- ideas. What is the status on that?
-A17. Pessimist's Answer: At the current time we believe this is not very
- likely. The Micronas chip (MAS3507) decoder in the Archos does not
- natively support decoding and there is very little program space in the
- player to implement it ourselves. The alternative would be to write a
- software decoder as part of the Rockbox firmware. However, as much as we
- love our players, the computing power of the Archos (SH1 microcontroller)
- is not fully sufficient for this need.
-
- Optimist's Answer: We can play any format if only we can write code for
- the DSP to decode it. The MAS 3507 (and 3587) are generic DSPs that
- simply have MP3 codecs in ROM. We can download new codecs in them and
- we will be the first to celebrate if we can get OGG or FLAC or anything
- into these DSPs. Unfortunately, we have no docs or tools for writing new
- MAS DSP code and Micronas is very secretive about it. If anyone can
- help, please get in touch!
-
- The recent release of Tremor (integer Ogg decoder) indicates it uses
- around 100 KB for lookup tables. That's not unreasonable for a decoder,
- but we only have 4 KB for both code *and* data. So the grim reality is
- that Ogg will never be supported by the Archos Players and Recorders.
-
-Q18. What about supporting playing of WMA files?
-A18. Dear Mr. Gates, you have two options. Re-read previous question, or go
- buy your own project.
-
-Q19: But you don't understand, I'm not talking about decoding here,
- since the data we want may already be in the decoded format (PCM).
-A19: Okay, last time. No. We have no problems whatsoever reading different
- file formats, call it PCM, WAV, GRI, PQR or whatever. The problem is
- that the CODEC only accepts MP3 data and nothing else. We could write a
- new CODEC if we knew how to do it, but there is no documentation on the
- DSP. Please note that we have no access to the DAC, so we can't send the
- data directly to the DAC.
-
-Q20. What is the most recent version of Rockbox?
-A20. We recently released version 2.3, so head on over to
- http://www.rockbox.org/download/ and pull it down.
- Make sure to read the release notes.
- (http://www.rockbox.org/download/rockbox-2.3-notes.txt).
-
-Q21. What do you plan to add to coming versions?
-A21. We don't plan versions in detail. We just write code, and when it feels
- right we release a new version.
-
-Q22. I tried one of your firmware files and now I can't access my hard disk!
- When I turn on my jukebox, it says:
- Part. Error
- Pls Chck HD
-A22. Your hard disk has been password protected. We're not 100% sure why it
- happens, but you can unlock it yourself. Look at:
- http://www.rockbox.org/lock.html
-
- Note: This is a very rare problem. Most people who think they have a
- locked disk actually just experience hardware and/or driver problems.
-
-Q23: This FAQ doesn't answer the question I have. What should I do?
-A23: You have a couple options here. You could forget the question, find an
- easier question, or accept '42' as the answer no matter what. We don't
- really recommend any of these (though I do opt for '42' often myself).
- What we do recommend is stopping by IRC, visiting the web site
- (http://www.rockbox.org) to see if the question was answered else where
- (like our nodo http://www.rockbox.org/twiki/bin/view/Main/NoDo FAQ)
- and just not included here, or ultimately dropping an email to the
- mailing list (rockbox@cool.haxx.se) or the FAQ maintainer listed on the
- project home page.
-
-Q24: Are there other ways to contact the developers?
-A24: Yes.
-
-Q25: Are you going to tell us what they are?
-A25: No. Post to the mailing list and we will get back to you.
-
-Q26: But I _really_ want to talk with you in person.
-A26: I'm sorry. My girlfriend/boyfriend/pet says I'm not allowed to, and the
- doctors here won't let me have pens or pencils. They say its some rule
- about us not having sharp objects. I'm sorry. Now please stop calling
- me here.
-
-Q27: Will you ever port Quake II to the Archos?
-A27: If you ask that again, I'm sending your address and phone number to the
- guy that mailed us with question #24.
-
-Q28: Umm, was that sarcasm?
-A28: That's it, I'm mailing him now.
-
-Q29: Is this legal? I mean, I'd just hate to see something like that
- challenged under the DMCA in all its ridiculousness. Any thoughts or
- ideas?
-A29: We believe we are in the green on this. We are not violating anyone's
- copyright and we are not circumventing any copy protection scheme.
- This has been a big point for the project since its inception. Some
- people wanted us to distribute patched versions of the original firmware,
- but seeing as that _would_ have violated Archos' copyright, we didn't
- follow that course of action.
-
-Q30: On the web site [and various information postings] you state
- "Every tiny bit was reverse engineered, disassembled and then
- re-written from scratch".
- If it was rewritten from scratch then why was it first reverse-engineered
- and disassembled? Instead this sounds more like someone disassembled it
- then used the understanding that they gained to create a new version,
- which is not quite the same as "from scratch".
-A30: Don't confuse the terms. Reverse engineering means examining a product
- to find out how it works. Disassembling the firmware is merely one tool
- used in that examination. Oscilloscopes and logic analyzers are other
- tools we have used. We have written every single byte of the Rockbox
- firmware. But we could not have written the software without first
- researching how the hardware was put together, i.e. reverse engineer it.
- All of this is completely legal. If you define "from scratch" as writing
- software without first researching the surrounding interfaces, then no
- software has ever been written from scratch.
-
-Q31: This FAQ is great, but do you have anything with a bit more detail?
-A31: Check out our website and it's documentation. Rockbox also has a user
- manual you can read. http://www.rockbox.org/manual/manual.pdf
-
-Q32: I've heard talk of a 'Rolo'. What is that? (Or 'All you ever wanted
- to know about Rockbox boot loaders')
-A32: Rolo is our bootloader. Rolo became available with our 1.4 release.
- To make use of Rolo, you must have a file with the same extension as
- your Rockbox firmware (.ajz on Recorder, .mod on Player) but a different
- name. You can then browse to it, and you 'run' the other firmware
- you wish to switch to by pressing play. Remember to set the Show Files
- option to "Supported" or "All" to be able to see the firmware files in
- the browser.
-
- *Poof* You will reboot to that firmware. (Note that in order to return
- to Rockbox you may need to reboot manually if the new firmware you loaded
- does not have a bootloader itself.)
-
-Q33: Can I use the Archos as an USB hard disk to store data from my PDA/
- digital camera/phone etc.
-A33: No. See http://www.rockbox.org/twiki/bin/view/Main/NoDo#4_Interfacing_with_other_USB_dev
-
-Q34: When I use Rockbox my jukebox's red "error" light turns on a lot, but this
- doesn't happen on the factory firmware. Why?
-A34: Rockbox uses the red LED as harddisk activity light, not as an error
- light. Relax and enjoy the music.
-
-Q35: I have a question about the batteries...
-A35: STOP! We have put together a completely different FAQ for battery
- related questions.
- Check out: http://www.rockbox.org/twiki/bin/view/Main/BatteryFAQ
-
-Q36. I have a question about patches...
-A36. Check out http://www.rockbox.org/twiki/bin/view/Main/WorkingWithPatches
- as it should answer any patch related questions you may have.
-
-Q37: What is the WPS?
-A37: That is the 'While Playing Screen'. Basically this is what is shown on
- your player's display while we are playing your song.
-
-Q38: What good is the WPS? How usable/flexible is it?
-A38: It is very good if you want information about the current item playing ;)
- By using a WPS configuration file you can manage exactly how/what you
- want displayed on your Archos Player. (Even better yet, if you want
- a feature that's not there, we are _always_ open to suggestions!)
- Please see http://www.rockbox.org/manual/wps.html for information.
-
-Q40: So how do I load/make a .wps file?
-A40: You check out http://www.rockbox.org/twiki/bin/view/Main/CustomWPS
- to learn the format/features of a .wps file, and read the manual to
- learn how to load it ;)
-
-Q41: Does Rockbox support other languages? How do I load/use different
- languages?
-A41: See: http://www.rockbox.org/lang
-
-Q42: Does Rockbox support other fonts/character sets?
-A42: Recorders do, Players don't.
-
-Q43: How do I use the loadable fonts?
-A43: If you own a Recorder see: http://www.rockbox.org/fonts/ Players
- cannot make use of loadable fonts.
-
-Q44: Why can't I use loadable fonts on the Player?
-A44: This is because the Player font is character cell based (as opposed to
- the Recorder's bitmap based display). This
- means that we are able to choose what characters to display, but not how
- to display them. We do have the ability to change/create up to 4 chars
- on one model and 8 on another, however we are currently using several of
- these 'letters' to store icons for the player.
-
-Q45: Why don't you have as many games available for the Players?
-A45: The display on the Players is character cell and not bitmap based.
- This means there is much more limitations in the amount of graphics that
- can be displayed, and thus what kind of games can be written.
-
-Q46: I keep shutting off my player in my pocket. Can the OFF (Recorder) or
- STOP (Player) key be locked?
-A46: No. Unfortunately, the ON/OFF mechanisms are handled entirely in
- hardware. The firmware can read the keys, but can't prevent them from
- shutting off the player.
-
-Q47: Can I record with Rockbox?
-A47: You sure can. Take a look at our manual.
- http://www.rockbox.org/manual/manual.pdf
-
-Q48: Now that I can record, can I use custom codecs (like LAME)?
-A48: The MP3 encoder is in the MAS3587F chip, and nothing we can change.
-
-Q49: What are the max/min bitrates for recording on the Recorder's encoder?
-A49: The builtin encoder is variable bit rate only with a max of 192kbit/s,
- and a min of 32kbit/s.
-
-Q50: Would it be possible to record from line in on the player?
-A50: No.
-
-Q51: I have a question about the id3v1 and id3v2 tags...
-A51: Rockbox supports both id3v1 and id3v2. If you have problems,
- report it to the developers and please provide an example.
-
-Q52: Where exactly did the name 'Rockbox' come from?
-A52: Well you can follow the full line of emails at
- http://www.rockbox.org/mail/archive/rockbox-archive-2002-01/0062.shtml
- However, the brief rundown is that it was recommended first by
- Tome Cvitan, and put to a vote (which it lost).
-
- Funny thing about democracies. This isn't one ;) Our beloved project
- leader vetoed the winning name and chose Rockbox instead.
- http://www.rockbox.org/mail/archive/rockbox-archive-2002-01/0134.shtml
-
- There you have it. Recommended by users, decision by dictator.
-
-Q53: Why is there a limit of 400 files in a directory?
-A53: This is a configurable value, 400 files is just the default.
-
-Q54: Why is there a 10,000 song limit on playlists?
-A54: This is a configurable value, 10,000 songs is just the default.
-
-Q55: How can I make playlists on my PC?
-A55: There are many programs that can create .m3u playlists. WinAmp is one.
- Another simple method, that requires no extra software, is to use dir:
-
- dir /b /s X:\ > X:\allfiles.m3u
- dir /b /s X:\Pop > X:\pop.m3u
-
- ...where X: is your Archos drive.
-
- Linux users can use the 'find' command:
-
- cd /mnt/archos
- find . -name "*.mp3" > all.m3u
-
- Remember that playlists are simple text files. You can edit them with any
- normal text editor.
-
-Q56: How does the shuffle work?
-A56: It sees the playlist as a deck of cards, shuffling the entries using a
- pseudo-random generator called the Mersenne Twister. After shuffling,
- the list is never changed again until you re-shuffle the list, by
- stopping the playback and restarting. If the repeat mode is enabled,
- the list will simply start over from the first file again, without
- re-shuffling.
- The random seed is stored in the persistent setting area, so that the
- resume feature can shuffle the playlist in exactly the same way when
- resuming.
-
-Q57: How can I find out about all the neat features that Rockbox has?
-A57: This information is in our manual (It sometimes gets a bit out of
- date, so please bear with us.) The information you are most likely
- looking for is a bit down the tree, so the here is the url:
- http://www.rockbox.org/manual/rec-general.html
-
- Also, check out the features-list at:
- http://www.rockbox.org/docs/features.html
-
-Q58: How can I see what bugs are currently open/being worked on?
-A58: Check out http://www.rockbox.org/bugs.shtml for a listing of bugs
- that have been reported.
-
-Q59: How can I report about bugs in Rockbox?
-A59: If we were better programmers we would take that as an insult. But we
- aren't, so we won't. The first step in reporting a bug is to review
- the rules we ask you to follow in your submission (listed at:
- http://www.rockbox.org/bugs.shtml#rules).
-
- Please note that we ask reports of bugs in CVS/daily builds to be sent
- to the mailing list, and bugs in released versions of Rockbox to be
- submitted through SourceForge's bug tracker. (A link to the bug tracker
- can be found under our bug submission rules.)
-
-Q60: What's with all the different versions of Rockbox?
-
-A60: We currently support four different hardware platforms: Players, Recorder
- v1, Recorder v2 and FM Recorder.
- For each platform, Rockbox is released in three versions: Release, Daily
- Build and Bleeding Edge. These only differ in release frequency.
-
- The Release version (currently 2.3) is a frozen known-good state. This
- means that we are confident that few, if any, significant bugs reside
- within the code for that version. This is the version for the common
- user, *except for Ondio*. Use a current daily build for Ondio.
- There are 2 bugs in the 2.3 release that render it not recommended for
- Ondio: (1) Saving configuration files or radio presets takes ages, and
- wears the flash chip much more than necessary. (2) Rockbox 2.3 does not
- yet support all Ondio hardware variants. This may lead to non-working
- storage access both from rockbox and via USB.
-
- The Daily Builds (http://www.rockbox.org/daily.shtml) are automated
- daily builds of the CVS (development) code. As such they contain all the
- new features (and bugs) that have been introduced after the last official
- release, up to this morning.
-
- The Bleeding Edge builds (http://www.rockbox.org/daily.shtml#bleeding_edge)
- are built from the CVS code every 20 minutes. The purpose of these builds
- is to verify the code builds properly on all platforms (and simulators)
- and also to allow testers to try out new features and bug fixes without
- having to build the code themselves.
-
- Please Note: Bleeding Edge builds are expected to be buggy at times. We
- ask that you _do not_ submit bug reports for Bleeding Edge builds, but
- would love to hear any reports you may have about Release or Daily build
- versions. (see "How can I report about bugs in Rockbox?")
-
-Q61: I am in Windows and can't create a .rockbox directory to store my
- files. When are you going to fix this?
-A61: You don't need to. The directory should have been created when you
- installed Rockbox. If it wasn't created, you haven't installed it
- correctly. Re-read the installation instructions on the download page:
-
- http://www.rockbox.org/download/
-
-Q62: I own a Mac. I can't seem to create the .rockbox file. Can you
- fix this?
-A62: See question 61.
-
-Q63: Will Rockbox work on any of Archos' other units?
-A63: Other than the 6 currently supported models: no, probably not. If Archos
- releases another rockbox-able player (such as the V2) then rockbox will
- find its way onto it, but their new devices as the Gmini, MM, and AV
- units are completely different hardware and probably won't be supported
- by Rockbox unless someone enthusiastically reverse engineers them and
- submits patches to make it happen.
-
- See also: http://www.rockbox.org/docs/nodo.html#7
-
-Q64: I installed Rockbox, removed the jukebox safely and rebooted, but Rockbox
- still didn't load. What is wrong? I am running Windows.
-A64: The old MOD/AJZ was not entirely deleted from the disk. It is still
- there, and the boot loader finds that one instead of the new file. Here's
- what you can do:
-
- - Download and install Directory Snoop (version 4.03 in November 2002)
- from http://www.briggsoft.com/dsnoop.htm.
- It's shareware, the trial version can be used 25 times.
-
- Directory Snoop can display true drive contents by bypassing the
- operating system and reading the raw drive sectors directly.
-
- - Plug the Jukebox in the PC as usual and power on
-
- - Launch Directory snoop
-
- - Click on the Jukebox drive letter in the [select drive] field in the
- toolbar. The content of the jukebox hard drive appears in the main
- window. Files which appear in red color don't seem to be present on the
- hard drive, but they still here.
-
- - Simply select the appropriate files (red color) and purge them
- (Purge button). Of course, don't erase the new archos.mod file and the
- .rockbox directory :)
-
- - Safely remove (Windows unmount device function) the Jukebox.
- Power it up and ...voila... Rockbox is there!
-
- (Thanks to Olivier Rafidison for this info)
-
- Another alternative:
-
- - Copy the firmware file to the jukebox again. Windows will rename it to "Copy of XXXXX"
-
- - Delete the original firmware file and remove the "Copy of" part from the new file name
-
- - Reboot
-
- If it doesn't load the correct firmware, do the whle procedure again until the new file is recognized.
-
-Q65: What kind of mic can I connect to my AJBR?
-A65: There are several types of microphones.
-
- Dynamic: The one that's available from Archos is a dynamic one.
- Their output level is high enough so that they don't need an
- amplifier (that's the reason why the Archos mic is of this type -
- it's cheap).
- - cheap
- - no good sound quality of cheap dynamic mics (good enough for
- speech)
- - no amplifier needed
-
- Backplate Condenser: These are the professional mics. They need phantom
- power (48V) for charging the condenser.
- They also need an amplifier, because their output level is low.
- - good sound quality
- - need phantom power (48V)
- - need amplifier
- - expensive
-
- Electret Condenser: These capsules are cheap and result in a good
- recording quality. They don't need phantom power voltage. They need power
- for the FET (field effect transistor) that's inside. If you have such a
- mic with a battery in it, it is mostly because of the FET power, not
- because of an amplification circuit inside the mic. These mics are in
- all the consumer products like mobile phones, PC headsets and so on.
- - cheap (2 EUR for a capsule)
- - good sound quality
- - need amplifier
- - need power for the FET (1,5 - 15V)
-
- Recommendation for do-it-yourselfers: Use electret condenser mic capsules,
- solder an amplifier for them which both amplifies the output level
- and feeds the power needed for the FET to the capsule.
- The one on http://www.geocities.com/ferocious_1999/md/micpreamp2.html
- was soldered and tested by Uwe Freese, and it works.
- There are some others available from www.elv.de and other sellers.
-
- Recommendation for others: Buy some mic + preamp combination which can be
- plugged into a line in of any amplifier. Maybe such a commercially
- available combination needs a power supply and doesn't work with
- batteries. Some are very expensive. You might have some luck at
- http://www.giant-squid-audio-lab.com/.
-
- What does not work: Don't use an amplifier thing that is simply connected
- between some mic cable. Maybe it sounds as if it could work, but I
- doesn't. If the piece of (expensive) electronic doesn't have a power
- source and your mic doesn't either, it does not work! A PC sound card or
- md player usually has a power output (same pin where the sound goes
- through, dc value) for feeding the FET of an electret condenser capsule
- (see above) (and this power could also used to feed a mic amplifier), but
- the Archos hasn't (it's a line in and no mic in!).
-
- If you want to know more on microphone powering, read this:
- http://www.hut.fi/Misc/Electronics/circuits/microphone_powering.html.
- (As described, you also need amplification.)
-
-Q66: I can't start rockbox when the charger is connected. What am I doing
- wrong?
-A66: If your device is off and you connect the charger, the Archos charger code
- is started immediately. You can then start Rockbox with holding down the
- ON key for several seconds. Hold the key down a really long time, until
- you see the Rockbox logo!
-
-Q67: Why can't you implement a cross-fader? That would be so cool!
-A67: Please read our NODO faq. http://www.rockbox.org/twiki/bin/view/Main/NoDo#3_Crossfade_between_tracks_
-
-Q68: My screen is all black/white when I run Rockbox on my Recorder!
-A68: This bug has been fixed in the later versions of Rockbox. Upgrade!
-
-Q69: Where are the FM controls for the FM Recorder?
-A69: In the menu: FM Radio
-
-Q70: I installed/renamed ajbrec.ajz (or archos.mod) but I am still booting
- with another version of firmware.
-A70: When looking on the hard disk the Archos firmware only matches the first
- ten characters of the file name. Because of this files like
- ajbrec.ajz.bak or ajbrec.ajz-20030404 match and are loaded. To
- prevent this from happening, give the it a file name that differs in
- the first 10 characters, e.g., ajbrec.bak.ajz.
-
-Q71: Help! My recorder crashes when I copy files to it!
-A71: Yes, the recorder can crash when you copy several gigabytes of
- files to it. The explanation is simple: Copying several gigabytes
- of files through USB requires a long period of sustained disk
- activity and drains more power than the batteries of the recorder
- can store. A long copy will eventually drain the batteries to the
- point where the recorder can no longer function and it halts.
- This even happens when connected to the charger, since the power
- drain is more than the charger can provide! If the recorder halts
- while connecter to the charger, the batteries will recover and
- after a short while it will reboot the Archos firmware in charger
- mode. To make it worse, depending on the USB drivers of your
- system it can cause your system to crash as well, or confuse it
- to the point it needs a reboot.
-
- There is no solution, just some tips:
-
- - Connect to the charger when copying lots of files. This will
- not prevent the problem, but it will take longer to happen.
-
- - Make sure you have "Deep Discharge" disabled.
-
- - Switch off the "Backlight On When Plugged" option.
-
- - Use USB 2.0. Transfers will be much faster.
-
- - Copy incrementally. With fully charged standard batteries it
- should be capable of sustained copying for 2 - 2.5 hours.
-
-Q72: What should I know about digital I/O connector on my jukebox?
-A72: The Recorder models have a connector for digital audio output using the
- common S/PDIF standard (Sony/Phillips Digital Interface). This jack is
- not present on the Studio/Player/FM Recorder models. By using the digital
- output in combination with high class external equipment, you can get
- much better sound quality out of your jukebox. This is because you can
- use better DA-converters and better amplifiers, plus you eliminate the
- analog audio connections between the jukebox and your equipment that can
- introduce noise and distortion.
-
- The Recorder and the FM Recorder models are able to record from digital
- sources, too. The digital inputs don't have the 15kHz lowpass filter like
- the analog inputs and you are sure to minimize the noise floor.
-
- Although S/PDIF can be an electrical or an optical signal and there are
- many devices that support both, the socket on the jukebox is for
- electrical signals only! Some devices have sockets that look the same,
- and can take either an optical or an electrical cable, but sadly this is
- not true with the Jukebox.
-
- If you want to connect your amp with digital input (RCA type) to the
- output of your Recorder you need an adapter cable (3.5mm stereo jack to
- dual RCA jack). Plug the 3.5mm stero jack into the digital I/O socket of
- your jukebox and the red RCA jack (right channel) into the digital input
- socket of your amp and that's it. You don't have to enable the digital
- output, since it's always on. The sound settings on the digital output
- are always flat, your volume, bass, treble, bass boost, loudness settings
- won't have any effect here, that's why fade in/out won't work,
- either. The sampling frequency of the digital output is the same as the
- sampling frequency of the mp3. It's therefore possible that your external
- equipment won't be able to synchronize to the output of your jukebox if
- you have mp3's with sampling frequencies other than 32, 44.1 or 48kHz
- (The pitch shift function also modifies the sampling frequency!).
-
- For recording digital signals on the Recorder, use the white RCA jack
- (left channel) and plug it into the digital output of your CD player, MD
- player or whatever. Don't forget to select digital input in the recording
- settings!
-
- Note that some adapter cables exist with different color coding, so if it
- doesn't work try to swap red and white. The tip of the 3.5mm jack is the
- digital input, the ring is the ouput. For recording digital signals on
- the FM Recorder, you need a special 4-pole 3.5mm plug (shaft = ground,
- tip = left channel analog line in, first ring (next to tip) = right
- channel analog line in, second ring = digital in).
-
- If you want to connect devices with optical inputs/outputs, you need a
- small converter box which converts your signal from electrical to optical
- (for digital output from the Archos) or optical to electrical (for
- digital recording in to the Archos).
-
-Q73: How do I unsubscribe from the rockbox mailing list?
-A73: The same way you subscribed, but you send an 'unsubscribe' request to the
- mailing list server instead of the 'subscribe' one you sent before.
-
- This is all mentioned on the same web page: http://www.rockbox.org/mail/
-
- Please please please pretty please with sugar on top, DO NOT attempt to
- mail unsubscribe requests to the mailing list itself. That will only
- annoy more than 400 readers and will have no effect on your subscription.
-
- In fact, you NEVER unsubscribe to ANY mailing lists by mailing unsubscribe
- to the list's address. You might as well take the opportunity to learn
- this right away.
-
- When you first subscribed to the mailing list, you were sent a welcome
- mail from the server. It contained information about the mailing list and
- instructions on how to unsubscribe. It is considered a good habit to keep
- such welcome messages from mailing lists.
-
- In addition to all this, every mail that is sent out to the rockbox
- mailing list has a set of standard headers that offer info about the
- mailing list: how to post, how to unsubscribe, where to find the mailing
- list archives etc. Sensible mail clients can display these headers.
-
-Q74: What is the Recorder V2?
-A74: The Recorder V2 is essentially an FM Recorder without the radio. It looks
- and works like the FM Recorder except for the radio, and has LiIon
- batteries. It is meant to replace the older Recorder model.
- NOTE! The first V2 Recorders were in fact real FM Recorders with the
- radio parts still mounted. If you are lucky, the FM radio might work in
- your V2, try it!
-
-Q75: Why is there a Radio option in my Rockbox for V2?
-A75: Some of the first V2 units had an FM radio in there, so if you're one of
- the few lucky ones, you can use the radio fine.
-
-Q76: What does "dir buffer is full" mean?
-A76: It means you have more files in a single directory than you have
- configured Rockbox to support. See Q53.
-
- Solution: Increase the "max files in dir browser" setting.
-
- The 2.2 release contained a bug that set the default buffer setting
- to 0, giving the dir buffer full error.
-
- Solution: Upgrade to 2.3.
-
-Q77: Why are you developing X when you should be doing Y?
-A77: You make the common mistake of confusing Rockbox development with that of
- commercial projects. There is not much of an agenda for the development
- of Rockbox. Anyone who wants to write new features can do that.
-
- If there is a current "huge emphasis" on the X functionality, it is
- because one or more developers, decided he/they wanted to write it. It's
- not because "Rockbox project management" decided function X is a more
- important feature than anything else.
-
- That is the nature of Free Software: People write code that scratches
- their own itches, or that simply is fun to write. Everybody working with
- Rockbox is doing it for fun. A wide or narrow audience actually has only
- little bearing on the choice of features to implement.
-
- The moment someone with a bit of time to spare and the necessary
- programming skills (or a will to learn them) feels function Y is a
- sufficiently useful feature, it will be written.
-
- (That could be you.)
-
-Q78: How do I control the recording frequency and quality?
-A78: Linus Nielsen Feltzing replied to a similar question on April 17th 2004,
- and this is a cut'n paste of his reply that can be read on the following
- URL:
- http://www.rockbox.org/mail/archive/rockbox-archive-2004-04/0814.shtml
-
- SAMPLE RATE
-
- Controls the amount of samples per second, basically which frequencies
- that can accurately be reproduced during playback. Lower frequencies
- produce smaller files, for two reasons: 1) The amount of data to be
- compressed is smaller and 2) the data is easier to compress, since higher
- frequencies are not present.
-
- BIT RATE
-
- Controls how many bits per second that is required for accurate live
- transmission of the compressed audio. When you compress the data harder
- (meaning worse sound quality), the bitrate gets lower.
-
- STEREO VS MONO
-
- A mono file doesn't necessarily have to be smaller than a stereo file.
- It all depends on the encoder. The MAS does produce smaller files with
- mono.
-
- MAS QUALITY
-
- The MAS uses VBR for compression (yes always), which means that the
- bitrate varies from frame to frame, depending on how compressable the
- data was at that point in time. This allows for a more even quality, and
- also smaller files if the data is easily compressed. The MAS can generate
- frames with bit rates ranging from 32kbit/s to 192kbit/s (MPEG1) or
- 8kbit/s to 160kbit/s (MPEG2).
-
- The MAS quality setting is just a way of selecting an average bit rate
- according to the following table (quality 0 is on the far left):
-
- FREQUENCY BITRATE IN KBIT/S
- ------------------------------------------------------
- 44100Hz stereo: 75, 80, 90, 100, 120, 140, 160, 170
- 22050Hz stereo: 39, 41, 45, 50, 60, 80, 110, 130
- 44100Hz mono: 65, 68, 73, 80, 90, 105, 125, 140
- 22050Hz mono: 35, 38, 40, 45, 50, 60, 75, 90
-
- (This table can be found on page 38 in the MAS3587 data sheet.)
-
- MPEG VERSIONS
-
- The different MPEG versions use different sample rates:
- 44100, 48000, 32000: MPEG version 1
- 22050, 24000, 16000: MPEG version 2
- 11025, 12000, 8000: MPEG version 2.5 (not an official standard)
-
-Q79: How can I make rockbox play tracks in CD order?
-A79: You have two options.
-
- 1: You can rename all tracks to have the track number in front of them
- (01 - track1.mp3, 02 - track2.mp3, ...). Just make sure to zero-prefix
- the number properly so that 10 will play after 09.
-
- 2: Make a playlist for each album and play that instead of the .mp3
- files.
-
- No, you can't make Rockbox use the track number id3 info for this.
-
-Q80: Why does Rockbox say that I only have 18Gb free space on my 20Gb disk?
-A80: Because the disk manufacturers have a different definition of Giga than
- the rest of the computer world does.
-
- Read more about it here:
-
- http://personal-computer-tutor.com/abc3/v30/vic30.htm
diff --git a/docs/FILES b/docs/FILES
index 74e872ada6..dba1b12998 100644
--- a/docs/FILES
+++ b/docs/FILES
@@ -9,7 +9,6 @@ CREDITS
CREDITS-MANUAL
CUSTOM_CFG_FORMAT
CUSTOM_WPS_FORMAT
-FAQ
FILES
HISTORY
KNOWN_ISSUES