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

[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

[petur]

Mike is working on a patch - it's in the tracker but so far it only works for iaudio x5, not iriver h1x0/h3x0

I'm sure there's plenty of freeware tools to change WAVs. If not, load it in audacity/cooledit/... and change the samplerate there (not 'resample'!)

Or wait until somebody post below here with a better answer

[perjak]

Cool Eddie did the job!

Thanks so far!

[jhMikeS]

This will be fixed in the next update (codecs always assumed 44.1kHz) but be aware you don't choose rates for SPDIF. The rate is taken from the source and rounded to the nearest standard rate (SPDIF could be actually running at 44099 for example). 48kHz will work with all codecs as well.

[perjak]

Sorry, if my question is stupid: Next update is not the same as the next daily build?

Is there any sort of announcement of an update? Or is it clearly seen on the frontpage of the website?

Best wishes Per in Denmark

This will be fixed in the next update (codecs always assumed 44.1kHz) but be aware you don't choose rates for SPDIF. The rate is taken from the source and rounded to the nearest standard rate (SPDIF could be actually running at 44099 for example). 48kHz will work with all codecs as well.

[lordzoster]

quoting from the Daily Builds page header, they "are automated daily builds of the code in CVS. They contain all the latest features. They may also contain bugs and/or undocumented changes".
this means that, in the last day an update have been committed, the daily build will contain it.
Elsewhere not.

[petur]

Well Mike wasn't to clear there: he meant with the next change of the recording code, not the next time the automated build system produces a new version.

Mike got himself an h120 to be able to finish this part of the code, so it'll be ready soon hopefully...

[jhMikeS]

New stuff in CVS now...try it out  

[perjak]

Sorry again. I am on a Mac.....

What do I do?  

My H140 was RockBoxed with the help from a friend with a Win PC a month ago.

Per

New stuff in CVS now...try it out  

[pabouk]

Follow the normal Rockbox upgrade procedure:
http://www.rockbox.org/twiki/bin/view/Main/ManualRockboxInstall#Keeping_Rockbox_up_to_date

If you do not want to lose your configuration, save your Rockbox settings before updating then you can restore it. Saving is needed only if the configuration block format changes between the versions but anyway it is useful to have the configuration saved in a file.

[perjak]

Thanks for reply, but

- do I have to visit the friend with the PC or can I do it from the Mac?

It's not easy for a rookie to differ between the terms "Daily Build", "Bleeding Edge" and a CVS.

Today I have d/l and unzipped two items fro the website:

1. rockbox.zip which unzips to rockbox Folder. In this folder there is a file named rockbox.iriver dated 7th Nov 2006, 6:38

2. rockbox-h120-20061107.zip which unzips to rockbox-h120-20061107 Folder. In this folder there is also a file named rockbox.iriver dated 7th Nov 2006, 6:38

In the root of the H140 drive there is a file named rockbox.iriver dated 1st Oct 2006, 7:09.

Is it enough just to replace the old one with the new one?

TIA

Per