Support and General Use > Recording
New Codec and FM Recording for iAudio and iRiver
jhMikeS:
Audio cannot be played if the codecs are loaded so any loading of codecs will stop playback. Else a new buffer would be needed for codecs that would take up space all the time and leave less for everything else.
Perhaps the codec could be loaded into normal RAM at first then swapped into the codec IRAM when needed, much like what happens between voice/(playback & record). But you still need a buffer set aside for that since there's no dynamic memory allocation.
Full flushing as well as creating the new file could be delayed and full sync delayed until recording has been stopped.
Don't say anything until the HD spins down perhaps? Make it a short timeout.
Needless to say disk access should be minimized in general.
pabouk:
Probably the best compromise (i.e. without changes to the Rockbox architecture) would be to (optionaly) load the codec immediately after entering the recording menu, entering the recording screen or changing a codec.
If someone wants to use Rockbox as a "ready" recorder (s)he will activate "Show Recording Screen on Startup" option so the codec will be loaded immediately after boot.
During recording the harddisk spindown timeout should be automatically set to 0.
lux:
hello, i tried to record FM radio on iriver H140 and have some notes: when recording to MP3 (i tried 160 and 320 too) there is some digital noise, like very quick pulses oh high frequencies. i tried WAV too, and sound was clear. is it problem of not good encoder or what?
pabouk:
Yesterday I encountered two crashes while recording to WavPack with the latest build. This bug was described in the tracker as #5952 already so I added my observations as a comment.
mlind:
--- Quote from: lux on September 06, 2006, 08:37:59 PM ---hello, i tried to record FM radio on iriver H140 and have some notes: when recording to MP3 (i tried 160 and 320 too) there is some digital noise, like very quick pulses oh high frequencies. i tried WAV too, and sound was clear. is it problem of not good encoder or what?
--- End quote ---
Is this the same thing?
http://forums.rockbox.org/index.php?topic=6327.0
Seems they fixed it by now.
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