Skipping wav files

[norma023]

Hmm, seems like a relevant thread for this. If not please let me know.

I've got a iRiver H320 (modded with a 4gig CF card, so no actual hard drive) that is running Rockbox. Unit works (and functions) just fine!

I use this primarily for recording, but for playback purposes, I've played back mp3, flac and wav files (44k-16bit) and no problems whatsoever.

Once I copied a wav file to it via USB, one roughly at or around 60mins long that was in 48k-24bit format, and after about 20 mins or so of playback the player started to skip. Tried it again the next day (playing back that same file) and the same problems appeared, however much quicker, like within 2 minutes.

I know the unit itself has a limitation (for recording) of 44k-16bit files. But what about playback of wav files, what bit rates etc does Rockbox support?

[nls]

This sounds like http://www.rockbox.org/tracker/task/9064 if you have battery level announcement enabled, try turning it off.

[Multiplex]

I know the unit itself has a limitation (for recording) of 44k-16bit files. But what about playback of wav files, what bit rates etc does Rockbox support?

Rockbox converts to 44k-16bit for playback, and in the past there have been coments by devs on the quality of the downsampler (look for threads about 24bit 96k flac files).

I saw a comit for the Wolfson codec and different sample rates but I don't think that is the device in the iRiver.

[nls]

Yes, during playback everything that is not 44.1kHz is resampled to this frequency, and yes our resampler is considered to be lacking...
Even if your hardware supports different samplerates and rockbox has support for those implemented the playback system still has this limitation. (Rockbox has support for 88.2kHz output on h300 actually, just, as i said, playback is limited to 44kHz)

On to the issue though, If you have ruled out the battery announcement bug... I don't think our resampler should cause it to skip and as 'decoding' wav files is very fast it shouldn't be skipping because of buffer underruns, unless your cf card is too slow.

44.1kHz/16 bit stereo wav is 1.4Mbit/second
48kHz/24 bit stereo is 2.3Mbit/second ~ 0.3Mbytes/second
If you can compile your own build, try enabling the test_disk plugin and see what speeds it reports (make sure to have a few hundred megs free for the test though)

[norma023]

Just checked and that announce  battery level option was set to "off" already, as was everything else in that same Voice menu screen (except for Voice Menu's, that was set to "on, of which I set it to off).

A previous owner to me isntalled the CF card, so I don't have specs on it unless I open up the unit myself to look at it.

I don't code so I won't be compiling my own build. Does the current release have a
test_disk plugin feature?

In the meantime, I'll put another 48k-24bit file on there and try again.

[AlexP]

No, none of the test plugins are included in current builds.

However, you don't need to do any coding to build.  See www.rockbox.org/wiki/SimpleGuideToCompiling and when you have that down, we can get to how to build the test plugin.