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Recording via optical in - sample rate 44,1 khz or 48 khz

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hellokitty:
Hi,

after I upgraded rockbox with daily build 230906 I realized that recording via optical in now seems to be limited to 44,1 khz. If I go to the recording menu it shows 48, but the generated file is only 44,1 khz. I could find no way to select a sample rate higher than 1441 kbps WAV (source digital).

It also seemed to be too slow, maybe because of the difference between optical out (48 khz) an the optical in ("forced" 44,1 khz).

I decided to downgrade with daily build 090806 which always generates 48 khz files from optical in. And it workes just fine.

But I really would like to see it working again because the latest builds have the bookmarking for .txt files which I missed for months.

Maybe someone can help me?

keuleJ:
Hi, I just discovered the same error. If you record 48kHz with optical, the recording screen shows you 48kHz. But if you listen to the file, it is played in 44.1kHz without resampling, pitch is too low and speed is too slow. If you play it on the computer, its still too slow, because of that I think something with the recorded file is wrong.
Funny is, that if you monitor the recording, I think you listen to the right pitch/speed.

This is for Wave and for MP3 recording. I didn't test other formats. I can supply example files, if needed.

Filed as a Bug: http://www.rockbox.org/tracker/task/6061

pabouk:
AFAIK Rockbox never does resampling while recording. The bug is that it writes wrong sampling rate into the WAV header (44.1 instead of 48 kHz). You can fix your recordings by manually editing the WAV header. :)

petur:
The bug is confirmed but not so easy to fix... Sorry.

perjak:
Well, I am having troubles with this as well....

So until it is fixed: Have do I manually edit the .wav header?

Thanks a million in advance

Per in Denmark

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