FS#1 - uncompressed PCM recording
Attached to Project:
Rockbox
Opened by Anonymous Submitter - Wednesday, 23 January 2002, 19:50 GMT
Last edited by Björn Stenberg (zagor) - Saturday, 21 September 2002, 20:06 GMT
Opened by Anonymous Submitter - Wednesday, 23 January 2002, 19:50 GMT
Last edited by Björn Stenberg (zagor) - Saturday, 21 September 2002, 20:06 GMT
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DetailsI would like to have the ability to develop firmware
for the Archos Recorder that allows users to record uncompressed PCM audio to the hard drive. Useful potential features: PCM recording to wave files. A recording UI that allows settings similar to those found on a DAT recorder: sample rate selection stereo of mono input level control recording feedback to the headphones ALC level meter store date/time stamp info to each sound file. John Burt |
This task depends upon
Closed by Björn Stenberg (zagor)
Saturday, 21 September 2002, 20:06 GMT
Reason for closing:
Additional comments about closing: Closing all feature requests.
Saturday, 21 September 2002, 20:06 GMT
Reason for closing:
Additional comments about closing: Closing all feature requests.
The 1Mbit/s link between the Mp3 chip and the CPU is a limiting factor.
Uncompressed 16bit audio at 44.1kHz needs about 1.5Mbit/s.
So the
theoretical maximum sample rate would be about 30kHz.
Actually, in the Recorder the MAS is connected via the
parallell interface (the data bus), not via the 1Mbit/s
serial interface.
Is this possible? Recording PCM would be great!
JB
It is possible, but we need to write new DSP code. We are desperately seeking information about the DSP but it is very hard to come by.
The classical Jukebox have an imput too, and he can
probably record in PCM too, that well be very interresting to
permit to the owners of Jukebox 6000 or studio to record in
PCM format.
Yes, the classical jukebox has a Line-In jack but the CODEC has *no*
recording capabilities. It doesn't even have an A/D converter!