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Clipping using Rockbox on Sansa e200

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cpchan:

--- Quote from: Gregory on January 25, 2008, 05:31:53 PM ---Also, here is the wma (vbr highest bitrate) of the song so someone can compare the two firmwares for themselves.
By the way, I hear something that sounds like clipping at the beggining of the song in both firmwares, so ignore that.
--- End quote ---

I finally got a chance to listen to your wma file. Almost the whole file sounded clipped to me, so I decoded it to wav and looked at the waveform in Audacity. Like I suspect, this is the case (please refer to the screenshot, anything that is red is clipped). Are you using some sort of EQ setting that makes it sound worst to you in Rockbox? Also, what is your volume setting?

Charles

Gregory:
I guess its only natural to not trust me, but the song clips in rockbox and nowhere else.  Given, the song is very loud and does probably clip some itself.  Maybe I haven't described what I'm hearing well enough.  It's like a popping or clicking, but what I am hearing only occurs in rockbox.  It's not throught the song either, only in certain places, which are generally the loudest parts.  One thing I notice too is that it mostly happens in the left channel, but it does happen in both.  I'm sure a different song might be the other way around, because of small recording differences in the studio.

Please listen to the commparison to see if you can hear it (dedicated host this time, lol).  http://files.filefront.com/sansa+vs+rockwav/;9529253;/fileinfo.html  What I hear in the comparison is exactly the same as what I hear when I'm listening with headphones.

The volume is ususally somewhere around -30db. The volume doesn't make a difference anyway.

The confg file is attached.

And just as a note, it occurs on other songs and albums as well, but not all of them.

Gregory:
For now, I've found a pretty good solution and I'm disappointed that I didn't think of it before. 
I just enabled the eq, and set the pre-cut to about -2db.  1db may have been enough, but it looked a little close while watching the oscilloscope demo.  Cleared up the problem perfectly.

This solution should point toward a more permanent one, but I wouldn't know anything.

Llorean:
Are you sure that the "nowhere else" doesn't just mean that other software intentionally goes out of its way to avoid clipping, while Rockbox just plays the audio as-is unless the user explicitly gives it instructions?

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