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://rockbox.haxx.se/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://rockbox.haxx.se/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://rockbox.haxx.se/docs/patch.html) 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://rockbox.haxx.se/mail/ 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://rockbox.haxx.se/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, serveral of us log the channel and will get you answers when we unidle. Q12: Wow, you guys talk on IRC alot? I wish I had been around for those conversations to see what happened. A12: We are glad you mentioned that! http://rockbox.haxx.se/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 harddisk, 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://rockbox.haxx.se/internals/ Q16. What exactly are you trying to achieve with this line of development? (A.K.A. whats 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 firmware is lacking some features and contain a number of annoying bugs that we want to fix. Some ideas would include (in no particular order): - No pause between songs - Mid-song resume - Mid-playlist resume - No-scan playlists - Unlimited playlist size - Autobuild playlists (ie: "all songs in this directory tree") - Auto-continue play in the next directory - Current folder and all sub-folder random play - Full disk random play - REAL random - Multi song queue - Faster scroll speed - More cool features with the wire remote control (including controlling your Archos from your car radio (req hw mod)) - Support playing of other files types (ie: Ogg Vorbis support) - Support for megabass switch (req hw mod) - Player control via USB - Memory expansion? Note: Just because something is on this list, does not mean that it is technically feasible. (But hey we can dream) And something not being on the list does not mean it isn't a neat idea. Bring it to the list. 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 sufficent 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 Intermetall 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 question #18, 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 1.4, so head on over to http://rockbox.haxx.se/download/ and pull it down. Make sure to read the release notes. (http://rockbox.haxx.se/download/rockbox-1.4-notes.txt). Q21. What do you plan to add to coming versions? A21. We have a rough idea of which features we plan/expect/hope to be included in which versions. Once again, remember that none of this is written in stone (noticing a pattern yet?) Version 2.0 Recording, Autobuild playlists, File/directory management Q22. I tried one of your firmware files and now I can't access my harddisk! When I turn on my jukebox, it says: Part. Error Pls Chck HD A22. Your harddisk has been password protected. We're not 100% sure why it happens, but you can unlock it yourself. Look at: http://rockbox.haxx.se/lock.html 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, reading http://rockbox.haxx.se to see if the question was answered else where and just not included here, or ultimatly dropping an email to the mailing list (rockbox@cool.haxx.se) or the FAQ maintainer listed on the project homepage. 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 website [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: Wait a minute here. When you released version 1.0 you did not have a single one of the ideas you have mentioned on your website actually implimented! Calling this version 1.0 is really misleading. Whats the story?! A31: In simple terms, the first release was called 1.0 because it had a basic working feature set that worked and had no known bugs. That is what 1.0 meant. It is true that Rockbox 1.0 lacked most of the feature set that every sane user wanted. However, we never said it was more feature-complete or better in any way then the original firmware that early in the project. The first release was done as a proof of concept that our ideas are moving in the right direction. We also hoped that it would help bring the project some attention, and some additional developers. Adding the missing features was just a matter of time. In more recent releases we have completed many of our desired goals, and several new ones that were implimented to fullfill user requests. 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. *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 harddisk to store data from my PDA/ digital camera/phone etc. A33: No. See: http://rockbox.haxx.se/docs/nodo.html#4 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://rockbox.haxx.se/docs/battery-faq.html Q36. I have a question about patches... A36. Check out http://rockbox.haxx.se/docs/patch.html 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://rockbox.haxx.se/manual/wps.html for information. Q40: So how do I load/make a .wps file? A40: You check out http://rockbox.haxx.se/docs/custom_wps_format.html to learn the format/features of a .wps file, and you visit http://rockbox.haxx.se/manual/wps.html to learn how to load it ;) Q41: Does Rockobx support other languages? How do I load/use different languages? A41: See: http://rockbox.haxx.se/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://rockbox.haxx.se/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 any games available for the Players? A45: The display on the Players is character cell and not bitmap based. This means we can only control what characters get displayed, not what pixels are shown. This makes the prospect of game play very slim (at least for anything involving graphics, so if you have text based games that only use 2 lines send them on in!). 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: Where's the recording option? Why can't I record?!! A47: I'd like to say we hid it because we don't like you, but you seem to be a good person so here's the truth. It's just not implimented in release versions of Rockbox yet. But stress not, you can still use Rolo to boot the default Archos firmware and record from there. Daily builds and bleeding edge versions have initial support for Recording. If you're brave and want to help out, get one, try out and report your findings! Q48: When recording is finally implimented in Rockbox, will it be possible to use custom codecs (like LAME) or is there a built in codec in the Archos? 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: Stop! Here is all the information about that (if you still have questions when done, ask then.) - Rockbox supports both id3v1 and id3v2 - The id3v2 support is limited to the first 300 bytes of the file. Some ripper programs tend to add very big tags first and then the important ones Rockbox wants to read end up beyond the first 300 bytes and then they remain unknown. - If you believe that the tags you don't see *are* within 300 bytes, then please make the mp3 file available for one of the developers to try out. - The 300-byte limit is subject to be removed in a future version (Actually, it is already removed in post-1.4 versions) Q52: Where exactly did the name 'Rockbox' come from? A52: Well you can follow the full line of emails at http://rockbox.haxx.se/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://rockbox.haxx.se/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: We have answered this question numerous times. It is mentioned in the release notes, and in the mailing list archives (http://rockbox.haxx.se/mail/archive/rockbox-archive-2002-08/0448.shtml). But, hey, we wouldn't want people to have to work to get an answer. (If you are reading this, feel proud, for you are the exception). We settled on 400 files in a directory because file listings take up memory on the unit, and we felt that 400 is significantly large enough for a majority of the populace. We prefer the option of limiting file limits in order to provide a greater amount of memory for buffering of files being played. Q54: Okay, I understand your 400 file limit. But why hardcode? Why not have this be dynamically allocated? A54: Because it's useless. Dynamic memory is only ever useful if you have memory consumers (tasks) that run at different points in time, and thus can reuse the same memory for different purposes. We don't have that. We must be able to show a big dir, index a big playlist and play a big mp3 file, all at the same time. They cannot use the same memory, and thus dynamic memory buys us nothing but extra complexity. If we used dynamic memory for this, we would get all kinds of odd bugs. Playlists that only got half-loaded if placed in certain directories. Parts of the disk you couldn't go to if playing a certain playlist etc. We have a number of tasks that consume memory. They can all run at the same time, using all of their alotted memory. Therefore it is much better to allocate that memory to them beforehand and not pretend that anyone else is able to use it. This is standard practice in memory-limited systems. Q55: Why is there a 10,000 song limit on playlists? A55: This is another hardcoded limit. We feel that as bigger disks arrive that this limit will increase. Because of the way that playlists are stored, it tends to be a bit more malleable than the directory file limit. For further detail, look at questions 53 and 54 and replace any instances of '400' with '10,000'. Q56: You don't understand! I _really_ need to have more then 400 files in a directory! A56: The use of really big directories was a workaround for the poor playlist capabilities of the original Archos firmware. With Rockbox, you no longer need this workaround. Organize your files in directories, then build playlists for all collections you want to shuffle-play. Q57: How can I make playlists on my PC? A57: 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. Q58: How does the shuffle work? A58: 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 reshuffle 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 reshuffling. 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. Q59: How can I find out about all the neat features that Rockbox has? A59: 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://rockbox.haxx.se/manual/rec-general.html Also, check out the features-list at: http://rockbox.haxx.se/docs/features.html Q60: How can I see what bugs are currently open/being worked on? A60: Check out http://rockbox.haxx.se/bugs.shtml for a listing of bugs that have been reported. Q61: How can I report about bugs in Rockbox? A61: 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://rockbox.haxx.se/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.) Q62: Whats with all the different versions of Rockbox? A62: There are really only two versions of Rockbox. One for Players and one for Recorders. However, we do have 3 other 'versions' of Rockbox available for download. These would be Releases, Daily Builds, and Bleeding Edge. The Release version (currently 1.4) has a fixed feature set. This means that we are confident that few, if any, significant bugs still reside within the code/features of that 'version'. This is the version for the common user. The Daily Builds (see: http://rockbox.haxx.se/daily.shtml#target_builds) are automated daily builds of the CVS code. As such they contain all the new features (and bugs ;) ) that have been introduced after the last official release, and upto and including that morning. The Bleeding Edge 'versions' are automated builds that are updated every 20 minutes or so. This are as feature full and bug ridden as you can possibly get if you are not a developer, or are not pulling directly from the CVS tree. Please Note: Daily and Bleeding Edge builds are expected to be buggy. We ask that you _do not_ submit bug reports for Bleeding Edge versions, but would love to hear any reports you may have about Release or Daily build versions. (see question #62). Q63: I am in Windows and can't create a .rockbox directory to store my files. When are you going to fix this? A63: We won't. The limitations of your operating system is not reason enough for us to change how we handle things. And you _can_ create this directory. Open a command line and type: mkdir j:\.rockbox You will need to correct the location for the drive letter that Windows assigns to your drive. Q64: I own a Mac. I can't seem to create the .rockbox file. Can you fix this? A64: Truth is, we don't need to fix anything. If you are using OSX then you can just open a console, change directories to the device and just: mkdir .rockbox If you are in another version then you should be able to do command-N in the Finder, then name the folder. Q65: Will Rockbox work on an of Archos' other units? A65: Some development has recently occured on the Archos FM units, and is in the daily builds. However the FM developement is not being done by the core team, and so is progressing at a slower rate. As yet, no development is planned for any of Archos' other units. Q66: I copied the rockbox MOD/AJZ file to the root, removed the jukebox safely and rebooted. But Rockbox still didn't load. What is wrong? I am running Windows. A66: 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 harddrive appears in the main window. Files which appear in red color don't seem to be present on the harddrive, 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) Q67: What kind of mic can I connect to my AJBR? A67: 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. (If you know a cheap solution with an electret condenser mic + preamp, please tell us!) 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 doen'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.) Q68: I can't start rockbox when the charger is connected. What am I doing wrong? A68: 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! Q69: Why can't you implement a crossfader? That would be so cool! A69: Please read our NODO faq. http://rockbox.haxx.se/docs/nodo.html#3 Q70: My screen is all black/white when I run Rockbox on my Recorder! A70: We have no way of knowing the correct contrast setting from start and the displays differ a lot. Change your contrast setting by doing this: F1, down, right, down, down, right, down, down, down, right, down (until you like the contrast)