diff options
-rw-r--r-- | docs/FAQ | 117 |
1 files changed, 64 insertions, 53 deletions
@@ -560,81 +560,92 @@ A68: The old MOD/AJZ was not entirely deleted from the disk. It is still | |||
560 | there, and the boot loader finds that one instead of the new file. Here's | 560 | there, and the boot loader finds that one instead of the new file. Here's |
561 | what you can do: | 561 | what you can do: |
562 | 562 | ||
563 | o Download and install Directory Snoop (version 4.03 in november 2002) | 563 | - Download and install Directory Snoop (version 4.03 in november 2002) |
564 | from http://www.briggsoft.com/dsnoop.htm | 564 | from http://www.briggsoft.com/dsnoop.htm |
565 | It's shareware, the trial version can be used 25 times. | 565 | It's shareware, the trial version can be used 25 times. |
566 | 566 | ||
567 | Directory Snoop can display true drive contents by bypassing the | 567 | Directory Snoop can display true drive contents by bypassing the |
568 | operating system and reading the raw drive sectors directly. | 568 | operating system and reading the raw drive sectors directly. |
569 | 569 | ||
570 | o Plug the Jukebox in the PC as usual and power on | 570 | - Plug the Jukebox in the PC as usual and power on |
571 | o Launch Directory snoop | 571 | |
572 | o Click on the Jukebox drive letter in the [select drive] field in the | 572 | - Launch Directory snoop |
573 | toolbar. The content of the jukebox harddrive appears in the main | 573 | |
574 | window. Files which appear in red color don't seem to be present on the | 574 | - Click on the Jukebox drive letter in the [select drive] field in the |
575 | harddrive, but they still here. | 575 | toolbar. The content of the jukebox harddrive appears in the main |
576 | 576 | window. Files which appear in red color don't seem to be present on the | |
577 | o Simply select the appropriate files (red color) and purge them | 577 | harddrive, but they still here. |
578 | (Purge button). Of course, don't erase the new archos.mod file and the | 578 | |
579 | .rockbox directory :) | 579 | - Simply select the appropriate files (red color) and purge them |
580 | o Safely remove (Windows unmount device function) the Jukebox. | 580 | (Purge button). Of course, don't erase the new archos.mod file and the |
581 | Power it up and ...voila... Rockbox is there! | 581 | .rockbox directory :) |
582 | |||
583 | - Safely remove (Windows unmount device function) the Jukebox. | ||
584 | Power it up and ...voila... Rockbox is there! | ||
582 | 585 | ||
583 | (Thanks to Olivier Rafidison for this info) | 586 | (Thanks to Olivier Rafidison for this info) |
584 | 587 | ||
585 | Q69: What kind of mic can I connect to my AJBR? | 588 | Q69: What kind of mic can I connect to my AJBR? |
586 | A69: There are several types of microphones. | 589 | A69: There are several types of microphones. |
590 | |||
587 | Dynamic: The one that's available from archos is a dynamic one. | 591 | Dynamic: The one that's available from archos is a dynamic one. |
588 | Their output level is high enough so that they don't need an | 592 | Their output level is high enough so that they don't need an |
589 | amplifier (that's the reason why the archos mic is of | 593 | amplifier (that's the reason why the archos mic is of this type - |
590 | this type - it's cheap). | 594 | it's cheap). |
591 | - cheap | 595 | - cheap |
592 | - no good sound quality of cheap dynamic mics (good enough for | 596 | - no good sound quality of cheap dynamic mics (good enough for |
593 | speech) | 597 | speech) |
594 | - no amplifier needed | 598 | - no amplifier needed |
599 | |||
595 | Backplate Condenser: These are the professional mics. They need phantom | 600 | Backplate Condenser: These are the professional mics. They need phantom |
596 | power (48V) for charging the condenser. | 601 | power (48V) for charging the condenser. |
597 | They also need an amplifier, because their output level is low. | 602 | They also need an amplifier, because their output level is low. |
598 | - good sound quality | 603 | - good sound quality |
599 | - need phantom power (48V) | 604 | - need phantom power (48V) |
600 | - need amplifier | 605 | - need amplifier |
601 | - expensive | 606 | - expensive |
602 | Electret Condenser: These capsules are cheap and result in a good recording | 607 | |
603 | quality. They don't need phantom power voltage. They need power | 608 | Electret Condenser: These capsules are cheap and result in a good |
604 | for the FET (field effect transistor) that's inside. If you have | 609 | recording quality. They don't need phantom power voltage. They need power |
605 | such a mic with a battery in it, it is mostly because of the FET | 610 | for the FET (field effect transistor) that's inside. If you have |
606 | power, not because of an amplification circuit inside the mic. | 611 | such a mic with a battery in it, it is mostly because of the FET |
607 | These mics are in all the consumer products like mobile phones, | 612 | power, not because of an amplification circuit inside the mic. |
608 | PC headsets and so on. | 613 | These mics are in all the consumer products like mobile phones, |
614 | PC headsets and so on. | ||
609 | - cheap (2 EUR for a capsule) | 615 | - cheap (2 EUR for a capsule) |
610 | - good sound quality | 616 | - good sound quality |
611 | - need amplifier | 617 | - need amplifier |
612 | - need power for the FET (1,5 - 15V) | 618 | - need power for the FET (1,5 - 15V) |
613 | recommendation for do-it-yourselfers: Use electret condenser mic capsules, | 619 | |
614 | solder an amplifier for them which both amplifies the output level | 620 | Recommendation for do-it-yourselfers: Use electret condenser mic capsules, |
615 | and feeds the power needed for the FET to the capsule. | 621 | solder an amplifier for them which both amplifies the output level |
616 | The one on http://www.geocities.com/ferocious_1999/md/micpreamp2.html | 622 | and feeds the power needed for the FET to the capsule. |
617 | was soldered and tested by Uwe Freese, and it works. | 623 | The one on http://www.geocities.com/ferocious_1999/md/micpreamp2.html |
618 | There are some others available from www.elv.de and other sellers. | 624 | was soldered and tested by Uwe Freese, and it works. |
619 | recommendation for others: Buy some mic + preamp combination which can be | 625 | There are some others available from www.elv.de and other sellers. |
620 | plugged into a line in of any amplifier. Maybe such a commercially | 626 | |
621 | available combination needs a power supply and doesn't work with | 627 | Recommendation for others: Buy some mic + preamp combination which can be |
622 | batteries. Some are very expensive. (If you know a cheap solution | 628 | plugged into a line in of any amplifier. Maybe such a commercially |
623 | with an electret condenser mic + preamp, please tell us!) | 629 | available combination needs a power supply and doesn't work with |
624 | what does not work: Don't use an amplifier thing that can be simply connected | 630 | batteries. Some are very expensive. (If you know a cheap solution |
625 | between some mic cable. Maybe it sounds as if it could work, but | 631 | with an electret condenser mic + preamp, please tell us!) |
626 | I doesn't. If the piece of (expensive) electronic doesn't have a | 632 | |
627 | power source and your mic doen't either, it does not work! | 633 | What does not work: Don't use an amplifier thing that is simply |
628 | A PC sound card or md player has usually a power output (same pin | 634 | connected between some mic cable. Maybe it sounds as if it could work, but |
629 | where the sound goes through, dc value) for feeding the FET of | 635 | I doesn't. If the piece of (expensive) electronic doesn't have a |
630 | an electret condenser capsule (see above) (and this power could | 636 | power source and your mic doen't either, it does not work! |
631 | also used to feed a mic amplifier), but the archos hasn't | 637 | A PC sound card or md player usually has a power output (same pin |
632 | (it's a line in and no mic in!). | 638 | where the sound goes through, dc value) for feeding the FET of |
639 | an electret condenser capsule (see above) (and this power could | ||
640 | also used to feed a mic amplifier), but the archos hasn't | ||
641 | (it's a line in and no mic in!). | ||
642 | |||
633 | If you want to know more on microphone powering, read this: | 643 | If you want to know more on microphone powering, read this: |
634 | http://www.hut.fi/Misc/Electronics/circuits/microphone_powering.html. | 644 | http://www.hut.fi/Misc/Electronics/circuits/microphone_powering.html. |
635 | (As described, you need also amplification.) | 645 | (As described, you also need amplification.) |
636 | 646 | ||
637 | Q70: I can't start rockbox when the charger is connected. What am I doing wrong? | 647 | Q70: I can't start rockbox when the charger is connected. What am I doing |
648 | wrong? | ||
638 | A70: If your device is off and you connect the charger, the Archos charger code | 649 | A70: If your device is off and you connect the charger, the Archos charger code |
639 | is started immediately. You can then start Rockbox with holding down the | 650 | is started immediately. You can then start Rockbox with holding down the |
640 | ON key for several seconds. Hold the key down a really long time, until | 651 | ON key for several seconds. Hold the key down a really long time, until |